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Practical Subnetting Solutions

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  • 58

    Practical Subnetting 1

    F0/1F0/0

    S0/0/0 S0/0/1Router ARouter B

    Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of subnets, and allow enough extra subnets and hosts for100% growth in both areas. Circle each subnet on the graphic and answer the questionsbelow.

    Marketing24 Hosts

    Management15 Hosts

    F0/0

    Reasearch60 Hosts

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 100% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for100% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Research

    IP address range for Marketing

    IP address range for Management

    IP address range for Router Ato Router B serial connection

    IP Address 172.16.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    B255.255.224.0

    44

    8

    60

    60

    120

    +

    +

    =

    =

    172.16.0.0 to 172.31.255172.16.32.0 to 172.63.255172.16.64.0 to 172.95.255

    172.16.96.0 to 172.127.255

  • 59

    Show your work for Practical Subnetting 1 in the space below.

    172

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    512

    Bin

    ary

    valu

    es -

    Num

    ber

    ofH

    osts

    -

    102420484,0968,192

    16,384

    32,768

    65,536

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    0 1 0 1 0 1 0 1

    1 1 0 0 1 1

    1 1 1 1

    172

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    172

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    172

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    172

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    172

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    31.2

    55

    172

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    63.2

    55

    172

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    95.2

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    127.

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    .25

    5

    (0)

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    (2)

    (3)

    (4)

    (5)

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    60 x1.0 604

    x1.0 4

  • 60

    Practical Subnetting 2

    F0/0S0/0/0

    S0/0/1Router A

    Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of hosts per subnet, and allow enough extra subnets andhosts for 30% growth in all areas. Circle each subnet on the graphic and answer the questionsbelow.

    Science Lab10 Hosts

    Tech Ed Lab20 Hosts

    F0/0

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 30% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for30% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Tech Ed

    IP address range for English

    IP address range for Science

    IP address range for Router Ato Router B serial connection

    IP address range for Router Ato Router B serial connection

    IP Address 135.126.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Router BS0/0/1

    Router C

    English Department15 Hosts

    F0/1

    F0/1

    S0/0/0

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    52

    7

    20

    6

    26

    B255.255.255.224

    135.126.0.0 to 135.126.0.31135.126.0.32 to 135.126.0.63135.126.0.64 to 135.126.0.95

    135.126.0.96 to 135.126.0.127

    135.126.0.128 to 135.126.0.159

  • 61

    Show your work for Problem 2 in the space below.

    135

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    .... .

    512

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    ary

    valu

    es -

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    ber

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    osts

    -

    102420484,0968,192

    16,384

    32,768

    65,536

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

    1 1 0 0 1 1 0 0 1 1 0 0 1 1

    1 1 1 1 0 0 0 0 1 1 1 1

    1 1 1 1 1 1 1 1

    . . . . . . . . .

    135.

    126.0

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    5.12

    6.0.32

    135.

    126.0

    .6413

    5.12

    6.0.96

    135.

    126.0

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    135.

    126.0

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    135.

    126.0

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    135.

    126.0

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    135.

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    135.

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    135.

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    135.

    126.1

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    135.

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    to to to to to to to to to to to to to to to to

    135.

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    .3113

    5.12

    6.0.63

    135.

    126.0

    .9513

    5.12

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    5.12

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    113

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    5513

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    135.

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    135.

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    135.

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    135.

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    135.

    126.1

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    135.

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    (0)

    (1)

    (2)

    (3)

    (4)

    (5)

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    (7)

    (8)

    (9)

    (10)

    (11)

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    5 x.3 1.5

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    nd u

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    2)

    20 x.3 6

  • 62

    Practical Subnetting 3Based on the information in the graphic shown, design a classfull network addressing schemethat will supply the minimum number of hosts per subnet, and allow enough extra subnetsand hosts for 25% growth in all areas. Circle each subnet on the graphic and answer thequestions below.

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 25% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for25% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Sales

    IP address range for Marketing

    IP address range for Administrative

    IP address range for Router Ato Router B serial connection

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    F0/0

    Administrative30 Hosts

    Sales185 Hosts

    F0/0

    IP Address 172.16.0.0

    S0/0/1

    Marketing50 Hosts

    F0/1 S0/0/0Router A

    Router B

    41

    5

    185

    47

    232

    B255.255.255.0

    172.16.0.0 to 172.16.0.255172.16.1.0 to 172.16.1.255172.16.2.0 to 172.16.2.255

    172.16.3.0 to 172.16.3.255

  • 63

    Show your work for Problem 3 in the space below.

    172

    . 16

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    172

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    512

    Bin

    ary

    valu

    es -

    Num

    ber

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    -

    102420484,0968,192

    16,384

    32,768

    65,536

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

    1 1 0 0 1 1 0 0 1 1 0 0 1 1

    1 1 1 1 0 0 0 0 1 1 1 1

    1 1 1 1 1 1 1 1

    . . . . . . . . .

    172.

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    172.

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    to to to to to to to to to to to to to to to to

    1172

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    1172

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    1172

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    1172

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    1172

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    1172

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    1172

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    1172

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    1172

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    1172

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    .255

    (0)

    (1)

    (2)

    (3)

    (4)

    (5)

    (6)

    (7)

    (8)

    (9)

    (10)

    (11)

    (12)

    (13)

    (14)

    (15)

    22

    5x.2

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    4x..

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  • 64

    Practical Subnetting 4

    F0/0 S0/0/0S0/0/1Router A

    Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of subnets, and allow enough extra subnets and hosts for 70%growth in all areas. Circle each subnet on the graphic and answer the questions below.

    Dallas150 Hosts New York

    325 Hosts

    F0/0

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 70% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for70% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for New York

    IP address range for Washington D. C.

    IP address range for Dallas

    IP address range for Router Ato Router B serial connection

    IP address range for Router Ato Router C serial connection

    IP Address 135.126.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Router BS0/0/1

    Router C F0/0F0/1

    S0/0/0

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    Washington D.C.220 Hosts

    54

    9

    325

    228

    553

    B255.255.240.0

    135.126.0.0 to 135.126.15.255135.126.16.0 to 135.126.31.255135.126.32.0 to 135.126.47.255

    135.126.48.0 to 135.126.63.255

    135.126.64.0 to 135.126.79.255

  • 65

    Show your work for Problem 4 in the space below.

    135

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    ber

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    128

    64

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    .... .

    512

    Bin

    ary

    valu

    es -

    Num

    ber

    ofH

    osts

    -

    102420484,0968,192

    16,384

    32,768

    65,536

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

    1 1 0 0 1 1 0 0 1 1 0 0 1 1

    1 1 1 1 0 0 0 0 1 1 1 1

    1 1 1 1 1 1 1 1

    . . . . . . . . .

    135.

    126.0

    .013

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    6.16.0

    135.

    126.3

    2.0

    135.

    126.4

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    135.

    126.1

    12.0

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    28.0

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    126.1

    44.0

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    126.1

    60.0

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    76.0

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    126.1

    92.0

    135.

    126.2

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    126.2

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    126.2

    40.0

    to to to to to to to to to to to to to to to to

    135.

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    5.25

    513

    5.12

    6.31.2

    5513

    5.12

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    5513

    5.12

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    5513

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    5513

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    255

    135.

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    .255

    135.

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    5513

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    .255

    135.

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    75.2

    5513

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    6.191

    .255

    135.

    126.2

    07.2

    5513

    5.12

    6.223

    .255

    135.

    126.2

    39.2

    5513

    5.12

    6.125

    5.25

    5

    (0)

    (1)

    (2)

    (3)

    (4)

    (5)

    (6)

    (7)

    (8)

    (9)

    (10)

    (11)

    (12)

    (13)

    (14)

    (15)

  • 66

    Practical Subnetting 5Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of hosts per subnet, and allow enough extra subnets andhosts for 100% growth in all areas. Circle each subnet on the graphic and answer thequestions below.

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 100% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for100% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Router F0/0 Port

    IP address range for Router F0/1 Port

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    F0/0

    Science Room10 Hosts

    Tech Ed Lab18 Hosts

    English classroom15 Hosts

    F0/1

    Art Classroom12 Hosts

    IP Address 210.15.10.0

    22

    4

    30

    30

    60

    C255.255.255.192

    210.15.10.0 to 210.15.10.63

    210.15.10.64 to 210.15.10.127

  • 67

    Show your work for Problem 5 in the space below.

    128 64 32 16 8 4 2 1 - Binary values

    Number of Subnets - 2 4 8 16 2 4 8 16 2 4 8 16 2 4 8 16 2 4 8 16 32 64 128 256

    Number of256 128 64 32 16 8 4 2 - Hosts

    210. 15 . 10 . 0 0 0 0 0 0 0 0210. 15 . 10 . 0 0 0 0 0 0 0 0210. 15 . 10 . 0 0 0 0 0 0 0 0210. 15 . 10 . 0 0 0 0 0 0 0 0210. 15 . 10 . 0 0 0 0 0 0 0 001

    1 01 1

    210.15.10.0210.15.10.64210.15.10.128210.15.10.192

    210.15.10.63210.15.10.127210.15.10.191210.15.10.255

    totototo

    (0)(1)(2)(3)

  • 68

    Practical Subnetting 6Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of subnets, and allow enough extra subnets and hosts for 20%growth in all areas. Circle each subnet on the graphic and answer the questions below.

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 20% growth

    Total number of subnets needed

    IP address range for Technology

    IP address range for Science

    IP address range for Arts & Drama

    IP Address range Administration

    IP address range for Router Ato Router B serial connection

    IP address range for Router Ato Router C serial connection

    IP address range for Router Bto Router C serial connection

    IP Address 10.0.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    =

    F0/0

    S0/0/1Router A

    Administration35 Hosts

    TechnologyBuilding320 HostsF0/0

    Router B

    S0/0/1

    Router C

    F0/1

    F0/1

    S0/0/0

    Science Building225 Hosts

    S0/0/0

    S0/0/1S0/0/0Art & Drama

    75 Hosts

    72

    9

    A255.240.0.0

    10.0.0.0 to 10.15.255.25510.16.0.0 to 10.31.255.25510.32.0.0 to 10.47.255.25510.48.0.0 to 10.63.255.255

    10.64.0.0 to 10.79.255.255

    10.80.0.0 to 10.95.255.255

    10.96.0.0 to 10.111.255.255

  • 69

    Show your work for Problem 6 in the space below.

    Num

    ber

    of S

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    28

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    5121,0242,0484,0968,192

    16,38432,76

    865,53

    6

    131,072

    262,144

    524,288

    1,048,576

    2,097,152

    4,194,304

    .

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    131,072

    262,144

    524,288

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    2,097,152

    4,194,304

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

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    10.0

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    10.15

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    10.2

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    10.2

    55.2

    55.2

    55

    (0)

    (1)

    (2)

    (3)

    (4)

    (5)

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    (7)

    (8)

    (9)

    (10)

    (11)

    (12)

    (13)

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  • 70

    Practical Subnetting 7Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of hosts per subnet, and allow enough extra subnets andhosts for 125% growth in all areas. Circle each subnet on the graphic and answer thequestions below.

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 125% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for125% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Router A Port F0/0

    IP address range for Research

    IP address range for Deployment

    IP address range for Router Ato Router B serial connection

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    Marketing75 Hosts

    IP Address 177.135.0.0

    Administration33 Hosts Sales

    255 Hosts

    Research135 Hosts

    F0/0S0/0/0 F0/0

    F0/1

    S0/0/0Router A

    Router B

    Deployment63 Hosts

    45

    9

    363

    454

    817

    B255.255.252.0

    177.135.0.0 to 177.135.3.255177.135.4.0 to 177.135.7.255177.135.8.0 to 177.135.11.255

    177.135.12.0 to 177.135.15.255

  • 71

    Show your work for Problem 7 in the space below.

    177.

    135

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    ber

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    6 .

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    512

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    102420484,0968,192

    16,384

    32,768

    65,536

    512

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    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

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    . . . . . . . . .

    177.1

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    177.1

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    177.1

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    35.35

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    35.4

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    35.5

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    177.1

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    517

    7.135

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    5517

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    55

    (0)

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    (3)

    (4)

    (5)

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    (8)

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    (13)

    (14)

    (15)

  • 72

    Practical Subnetting 8

    F0/0 S0/0/0S0/0/1Router A

    Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number subnets, and allow enough extra subnets and hosts for 85%growth in all areas. Circle each subnet on the graphic and answer the questions below.

    New York8 Hosts

    F0/0

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 85% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for85% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Router A F0/0

    IP address range for New York

    IP address range for Router Ato Router B serial connection

    IP Address 192.168.1.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Router B

    F0/1

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    Boston5 Hosts

    Research & Development8 Hosts

    33

    6

    13

    12

    25

    C255.255.255.224

    192.168.1.0 to 192.168.1.31192.168.1.32 to 192.168.1.63

    192.168.1.64 to 192.168.1.95

  • 73

    Show your work for Problem 8 in the space below.

    128 64 32 16 8 4 2 1 - Binary values

    Number of Subnets - 2 4 8 16 2 4 8 16 2 4 8 16 2 4 8 16 2 4 8 16 32 64 128 256

    Number of256 128 64 32 16 8 4 2 - Hosts

    192. 168 . 1 . 0 0 0 0 0 0 0 0192. 168 . 1 . 0 0 0 0 0 0 0 0192. 168 . 1 . 0 0 0 0 0 0 0 0192. 168 . 1 . 0 0 0 0 0 0 0 0192. 168 . 1 . 0 0 0 0 0 0 0 001

    1 01 1

    1 0 01 0 11 1 01 1 1

    192.168.1.0192.168.1.32192.168.1.64192.168.1.96192.168.1.128192.168.1.160192.168.1.192192.168.1.224

    192.168.1.31192.168.1.63192.168.1.95192.168.1.127192.168.1.159192.168.1.1191192.168.1.223192.168.1.255

    totototototototo

    (0)(1)(2)(3)(4)(5)(6)(7)

  • Practical Subnetting 9

    F0/0

    S0/0/0S0/0/1Router A

    Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of hosts per subnet, and allow enough extra subnets andhosts for 15% growth in all areas. Circle each subnet on the graphic and answer the questionsbelow.

    Dallas1500 Hosts

    F0/0

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 15% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for15% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Ft. Worth

    IP address range for Dallas

    IP address range for Router Ato Router B serial connection

    IP address range for Router Ato Router C serial connection

    IP address range for Router Cto Router D serial connection

    IP Address 148.55.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Router BS0/0/1

    Router C

    F0/1

    S0/0/0

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    Router D S0/0/0S0/0/1

    74

    Ft. Worth2300 Hosts

    51

    6

    2300

    345

    2645

    B255.255.240.0

    148.55.0.0. to 148.55.15.255148.55.16.0. to 148.55.31.255148.55.32.0. to 148.55.47.255

    148.55.48.0. to 148.55.63.255

    148.55.64.0. to 148.55.79.255

  • 75

    Show your work for Problem 9 in the space below.

    148.

    55

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    102420484,0968,192

    16,384

    32,768

    65,536

    512

    1,024

    2,048

    4,096

    8,192

    16,384

    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

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    . . . . . . . . .

    148.5

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    8.55.

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    128.0

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    to to to to to to to to to to to to to to to to

    148.5

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    148.5

    5.63

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    148.5

    5.79

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    148.5

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    148.5

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    148.5

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    7.255

    148.5

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    148.5

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    148.5

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    514

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    191.2

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    (0)

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    (4)

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    (14)

    (15)

  • 76

    Practical Subnetting 10Based on the information in the graphic shown, design a network addressing scheme that willsupply the minimum number of subnets, and allow enough extra subnets and hosts for110% growth in all areas. Circle each subnet on the graphic and answer the questions below.

    Address class

    Custom subnet mask

    Minimum number of subnets needed

    Extra subnets required for 110% growth

    Total number of subnets needed

    Number of host addresses in the largest subnet group

    Number of addresses needed for110% growth in the largest subnet

    Total number of addressneeded for the largest subnet

    IP address range for Sales/Managemnt

    IP address range for Marketing

    IP address range for Research

    IP address range for Router Ato Router B serial connection

    IP Address 172.16.0.0

    _____________________________

    _____________________________

    _________

    _________

    _________

    _________

    _________

    _________

    _____________________________

    _____________________________

    _____________________________

    _____________________________

    (Round up to the next whole number)

    (Round up to the next whole number)

    Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

    +

    +

    =

    =

    F0/0S0/0/0

    S0/0/1Router AF0/0

    Router B

    F0/1

    Sales115 Hosts

    Management25 Hosts

    Research35 Hosts

    Marketing56 Hosts

    45

    9

    140

    154

    294

    B255.255.255.240

    172.16.0.0 to 172.16.15.255172.16.16.0 to 172.16.31.255172.16.32.0 to 172.16.47.255

    172.16.48.0 to 172.16.63.255

  • 77

    Show your work for Problem 10 in the space below.

    172

    .16

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    102420484,0968,192

    16,384

    32,768

    65,536

    512

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    32,768

    65,536

    0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

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    . . . . . . . . .

    172.

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    to to to to to to to to to to to to to to to to

    172.

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    172.

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    172.

    16.11

    1.255

    172.

    16.12

    7.255

    172.

    16.14

    3.255

    172.

    16.15

    9.255

    172.

    16.17

    5.25

    517

    2.16

    .191.2

    5517

    2.16

    .207

    .255

    172.

    16.2

    23.2

    5517

    2.16

    .239

    .255

    172.

    16.2

    55.2

    55

    (0)

    (1)

    (2)

    (3)

    (4)

    (5)

    (6)

    (7)

    (8)

    (9)

    (10)

    (11)

    (12)

    (13)

    (14)

    (15)

  • Valid and Non-Valid IP Addresses

    Using the material in this workbook identify which of the addresses below are correct andusable. If they are not usable addresses explain why.

    IP Address: 0.230.190.192 ________________________________Subnet Mask: 255.0.0.0 ________________________________

    IP Address: 192.10.10.1 ________________________________Subnet Mask: 255.255.255.0 ________________________________

    IP Address: 245.150.190.10 ________________________________Subnet Mask: 255.255.255.0 ________________________________

    IP Address: 135.70.191.255 ________________________________Subnet Mask: 255.255.254.0 ________________________________

    IP Address: 127.100.100.10 ________________________________Subnet Mask: 255.0.0.0 ________________________________

    IP Address: 93.0.128.1 ________________________________Subnet Mask: 255.255.224.0 ________________________________

    IP Address: 200.10.10.128 ________________________________Subnet Mask: 255.255.255.224 ________________________________

    IP Address: 165.100.255.189 ________________________________Subnet Mask: 255.255.255.192 ________________________________

    IP Address: 190.35.0.10 ________________________________Subnet Mask: 255.255.255.192 ________________________________

    IP Address: 218.35.50.195 ________________________________Subnet Mask: 255.255.0.0 ________________________________

    IP Address: 200.10.10.175 /22 ________________________________________________________________

    IP Address: 135.70.255.255 ________________________________Subnet Mask: 255.255.224.0 ________________________________

    The network ID cannot be 0.

    OK

    245 is reserved forexperimental use.

    This is the broadcast addressfor this range.

    127 is reserved for loopbacktesting.

    OK

    This is the subnet address for the3rd usable range of 200.10.10.0

    OK

    This address is taken from the firstrange for this subnet which is invalid.

    This has a class B subnetmask.

    A class C address must use aminimum of 24 bits.

    This is a broadcast address.

    78

    Reference Pages 28-29

    Reference Page Inside Front Cover

    Reference Pages 48-49

    Reference Pages 54-55

    Reference Page Inside Front Cover

    Reference Page Inside Front Cover

    Reference Pages 54-55 and/or Inside Front Cover

    Reference Pages 56-57

    Reference Pages Inside Front Cover

    Reference Pages 34-35

    Reference Pages 30-31

    Reference Pages 48-49

  • 0-127

    128-255

    0-34-78-11

    12-1516-1920-2324-2728-3132-3536-3940-4344-4748-5152-5556-5960-6364-6768-7172-7576-7980-8384-8788-9192-9596-99

    100-103104-107108-111112-115116-119120-123124-127128-131132-135136-139140-143144-147148-151152-155156-159160-163164-167168-171172-175176-179180-183184-187188-191192-195196-199200-203204-207208-211212-215216-219220-223224-227228-231232-235236-239240-243244-247248-251252-255

    /308+8+8+6

    255.255.255.2524 Hosts

    /298+8+8+5

    255.255.255.2488 Hosts

    /288+8+8+4

    255.255.255.24016 Hosts

    /278+8+8+3

    255.255.255.22432 Hosts

    /268+8+8+2

    255.255.255.19264 Hosts

    /258+8+8+1

    255.255.255.128128 Hosts

    /248+8+8

    255.255.255.0256 Hosts

    0-7

    8-15

    16-23

    24-31

    32-39

    40-47

    48-55

    56-63

    64-71

    72-79

    80-87

    88-95

    96-103

    104-111

    112-119

    120-127

    128-135

    136-143

    144-151

    152-159

    16-167

    168-175

    176-183

    184-191

    192-199

    200-207

    208-215

    216-223

    224-231

    232-239

    240-247

    248-255

    0-15

    16-31

    32-47

    48-63

    64-79

    80-95

    96-111

    112-127

    128-143

    144-159

    160-175

    176-191

    192-207

    208-223

    224-239

    240-255

    0-63

    64-127

    128-191

    192-255

    0-255

    IP Address Breakdown

    79

  • /24255.255.255.0

    256 Hosts1 Subnet

    Start with a square. The whole squareis a single subnet comprised of 256addresses.

    Visualizing Subnets UsingThe Box Method

    The box method is the simplest way to visualize the breakdown ofsubnets and addresses into smaller sizes.

    /25255.255.255.128

    128 Hosts2 Subnets

    /26255.255.255.192

    64 Hosts4 Subnets

    80

    Split the box in half and you get twosubnets with 128 addresses,

    Divide the box into quarters and youget four subnets with 64 addresses,

  • 81

    /27255.255.255.224

    32 Hosts8 Subnets

    Split each individual square and youget eight subnets with 32 addresses,

    /30255.255.255.252

    4 Hosts64 Subnets

    /29255.255.255.248

    8 Hosts32 Subnets

    /28255.255.255.240

    16 Hosts16 Subnets

    Split the boxes in half again and youget sixteen subnets with sixteenaddresses,

    The next split gives you thirty twosubnets with eight addresses,

    The last split gives sixty four subnetswith four addresses each,

  • 82

    # of BitsBorrowed

    012345678910111213141516171819202122

    SubnetMask

    255.0.0.0255.128.0.0255.192.0.0255.224.0.0255.240.0.0255.248.0.0255.252.0.0255.254.0.0255.255.0.0

    255.255.128.0255.255.192.0255.255.224.0255.255.240.0255.255.248.0255.255.252.0255.255.254.0255.255.255.0

    255.255.255.128255.255.255.192255.255.255.224255.255.255.240255.255.255.248255.255.255.252

    Total # ofSubnets

    1248163264128256512

    1,0242,0484,0968,19216,38432,76865,536131,072262,144524,288

    1,048,5762,097,1524,194,304

    Total # ofHosts

    16,777,2168,388,6084,194,3042,097,1521,048,576524,288262,144131,07265,53632,76816,3848,1924,0962,0481,02451225612864321684

    Usable # ofHosts

    16,777,2148,388,6064,194,3022,097,1501,048,574524,286262,142131,07065,53432,76616,3828,1904,0942,0461,02251025412662301462

    # of BitsBorrowed

    01234567891011121314

    SubnetMask

    255.255.0.0255.255.128.0255.255.192.0255.255.224.0255.255.240.0255.255.248.0255.255.252.0255.255.254.0255.255.255.0

    255.255.255.128255.255.255.192255.255.255.224255.255.255.240255.255.255.248255.255.255.252

    Total # ofSubnets

    1248163264128256512

    1,0242,0484,0968,19216,384

    Total # ofHosts65,53632,76816,3848,1924,0962,0481,02451225612864321684

    Usable # ofHosts65,53432,76616,3828,1904,0942,0461,02251025412662301462

    Class C Addressing Guide# of Bits

    Borrowed0123456

    SubnetMask

    255.255.255.0255.255.255.128255.255.255.192255.255.255.224255.255.255.240255.255.255.248255.255.255.252

    Total # ofSubnets

    1248163264

    Total # ofHosts

    25612864321684

    Usable # ofHosts

    25412662301462

    CIDR/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30

    CIDR/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30

    CIDR/24/25/26/27/28/29/30

    Class B Addressing Guide

    Class A Addressing Guide

    _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

    ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

    _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

  • Inside Cover


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