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NETWORKS & VLAN
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WHY COMMUNICATION ?
y Communications activity associated with distributing or
exchanging information
y Telecommunications technology of communications at a
distance that permits information to be created any where andused everywhere with little delay
y Today it, involves
y Data: digital and analog
y
Voice: spoken wordy Video: telelcommunication imaging
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Essentials for Communications
1
>Must have a message2>Message must have a transmitter
3>Message must have a medium
4>Message must be understood
5>Message must have some level of security
Source Transmitter Transmission Receiver Destination
Source System Destination System
Workstation/PC Workstation/PCMedium
1 2 3 4 5 6
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TYPES OF NETWORKS
LAN LOCAL AREA NETWORK IS A SMALL GEOGRAPHICAL AREA SUCH AS COLLEGE
CAMPUS
MAN METROPOLITAN AREA NETWORK IS A NETWORK OVER A LARGER
GEOGRAPHICAL
AREA SUCH AS COMMMUNICATION WIHIN A CITY .
WAN WIDE AREA NETWORK IS A NETWORK USED OVER AN EXTREMELY LARGE
GEOGRAPHICAL AREA SUCH AS 2 CITIES.
Basics of Networking
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NETWORKS ARE BROKEN INTO 3 TOPOLOGIES.
THEY ARE:
yBUS TOPOLOGY
ySTAR TOPOLOGY
yMESH TOPOLOGY
yRING TOPOLOGY
yHYBRID TOPOLOGY
Basics of Networking
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BUS TOPOLOGYALLOWS INFORMATION TO BE
DIRECTED FROM ONE COMPUTER TO THE OTHER.
LOTS OF BINARY COLLISION THOUGH.
BUS TOPOLOGY
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STAR TOPOLOGY IS THE MOST COMMON TYPEUSED. ALL COMPUTERS ARE ATTACHED TO A HUB.
LESS COLLISIONS AND MOST EFFICIENT.
STAR TOPOLOGY
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RING TOPOLOGY
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MESH TOPOLGY
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HYBRID TOPOLOGY
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The seven layers of the OSI Model are:
Laye 1 H C LLaye 2 D T -L K
Laye 3 ETW K
Laye 4 T T
Laye 5 E
Laye 6 E E T T
Laye 7 L C T
Basics of etwo king
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VLAN
WHY VIRTUAL?
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General Description of LAN
Covering a small geographic area
y Home
y Office
y Group of Buildings
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Definition of Virtual Local Area
Network
y Commonly known as VLAN
yGroup of hosts(ports) on the switch with a common set of requirements
y Group of hosts communicate as if they were attached to the same wire
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LAN VS. VLAN
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Static VLAN
y Ports on a switch are administratively assigned to a VLAN
y Benefits
y can be assigned by port, address, or protocol type
y secure, easy to configure and monitor
y works well in networks where moves are controlled
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Dynamic VLAN(VMPS)
y Switch ports can automatically determine a users VLAN assignment based on
either/or:
y MAC / logical address / protocol type
y When connected to an unassigned port, the switch dynamically configures the
port with the right VLAN
y It has 2 stages. Firstly static then VMPS.17
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Port-Centric VLAN
y Same VLAN, same router interface
y Easy for managemenT
3 Port-Centric VLANs
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VTP AND ITS
MODES
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ISL FORMAT
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HOW VTP WORKS?
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THANK YOU