Date post: | 02-Jan-2016 |
Category: |
Documents |
Upload: | fleur-mcconnell |
View: | 51 times |
Download: | 0 times |
Topic 19 TCP/IPTopic 19 TCP/IP
Enabling Objectives19.1 DESCRIBE the OSI model and the TCP/IP Protocol.19.2 DISCUSS IP addresses.19.3 IDENTIFY common TCP/IP based protocols.
ARP
DNSDHCP
FTP
HTTPICMP
LDAP
OSPFPPP
PPTP
IRC
RIP
SNMP
SMTP
POP
TELNETIP
TCP
IGMPEGP
IGP
SMB
Network Devices
Transfer Mediums
Protocols
Basic Network Components
OSI Reference Model
PhysicalPhysical
Data LinkData Link
NetworkNetwork
TransportTransport
SessionSession
PresentationPresentation
ApplicationApplication
LLC Sublayer
MAC Sublayer
Layer 7
Layer 6
Layer 5
Layer 4
Layer 3
Layer 2
Layer 1
How data transfer’s over a network
PhysicalData LinkNetworkTransportSession
PresentationApplication
PhysicalData LinkNetworkTransportSession
PresentationApplication
Host B
End Product
Screen Layout
Start, Stop, Resume
End-to-End Management
Address and Routing
Media Access
Binary Transmission
MEDIAMEDIA
Host A
OSI model template for TCP/IP
Application
Transport
Application
Presentation
Session
Transport
Network
Data Link
Physical
OSI MODELOSI MODEL TCP/IP ModelTCP/IP Model
Network
Data Link
Physical
TCP/IP Model
Application
Transport
ETHERNET
PhysicalLAYER 1
LAYER 2
LAYER 3
LAYER 4
LAYER 5
Network
IRC
DNS
SMTP
SNMP
POP3
TELNET
HTTP
ARP/RARPIPICMP
DHCPIGMP
RIP
TCP UDP
OSPFIGP
EGPBGP
IP Datagram Structure
Version (4
bits)
Header Length (4 bits)
Type of Service (8 bits)
Total length of Datagram (16 bits)
Datagram Identification (16 bits)
Flags (3 bits)
Fragment Offset (13 bits)
Time To Live (TTL) (8 bits)
Protocol (8 bits)
Header Checksum (16 bits)
Source IP Address
Destination IP Address
IP Options (will be padded to fit in the 32-bit boundary)
Data portion of Datagram
TCP/IP Port Numbers
Well known port numbers
Port numbers in GCCS
Each Device Requires 3 IP’s
1st Octet Range # Hosts
CLASS A 1 – 126 16,777,214
CLASS B 128 – 191 65,534
CLASS C 192 – 223 254
CLASS D 224 – 239 Used for multicast
Default Subnet Masks
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0
Class D N/A
2. Subnet Mask1. Unique IP
Every device connected to a TCP/IP network requires at least one
Internet Protocol (IP) address and it must be unique.
An IP address is commonly represented in dotted decimal notation;
this makes them easier to read than in binary format. Example:
205.1.12.101 vice 11001101 00000001 00001100 01100101
IP addresses are also broken down into classes.
What does Subnet Mask do?
205.1.3.1 11001101 . 00000001 . 00000011 . 00000001
255.255.255.0 11111111 . 11111111 . 11111111 . 00000000
Destination IP Address
=
Subnet Mask
=
11001101 . 00000001 . 00000011 . 00000000
ANDING ANDING ANDING
205.1.3.0=
Extracted Network addressLocal Network Address = 205.1.2.0
205.1.3.0 205.1.2.0 Default Gateway
IP Datagram
“ANDING”“ANDING”
Each Device Requires 3 IP’s (cont.)
3.
Basic IP Routing
Application
Transport
Network
Data Link
Physical
Application
Transport
Network
Data Link
Physical
Network
Data Link
Physical
205.1.2.0 205.1.3.0
ROUTER
TCP/IP = Postal Service
TYPED LETTER
TYPED LETTER
LETTER CARRIER
BAGTYPED LETTER
ADDRESSED ENVELOPE
ADDRESSED ENVELOPE
TYPED LETTER
TYPED LETTERADDRESSED ENVELOPE
LETTER CARRIER
BAGTYPED LETTER
ADDRESSED ENVELOPE
RECEIVE
LETTER PROCESS
SEND
Letter analogy
$.44$.44
Read Pages 19-15 through 19-19
Important Things to Know About IP Addressing!