Network

Network Layer Functions ,[object Object],[object Object],[object Object],1 1 2 2 3

Network Layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Routing Algorithms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Adaptive Routing ,[object Object],[object Object],[object Object]

Distributed Routing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Congestion Control ,[object Object],[object Object],[object Object],[object Object]

Routing Information Protocol (RIP) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Calculating the Cost Network 1 Network 2 Network 3 Network 4 Network Hops 2 1 3 1 1 2 Network Hops 1 1 1 2 Network Hops 1 1 2 3 3 4 2 1 3 2 Transmitted routing table Transmitted routing table Internal routing table Router A Router B Router C

IP Routing ,[object Object],[object Object],[object Object]

Routing Table Network Mask Router Hops Age Port ID 3 255 C 1 30 1 4 255 C 1 30 2 2 255 B 2 15 2 1 255 B 3 45 2

Example: TCP/IP ,[object Object],[object Object],[object Object],[object Object]

References TCP/IP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TCP/IP Stack 1 2 3 4 5 -7 OSI DIX Ethernet or ... ARP ICMP IP TCP UDP DNS TELNET FTP

Notes on TCP/IP Suite ,[object Object],[object Object],[object Object]

Brief Definitions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Other TCP/IP Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer Protocols DNS Query DNS Reply SYN SYN/ACK ACK Caller Callee {TCP Establishment} ARP Request ARP Reply

IP Functionality ,[object Object],[object Object],[object Object],[object Object]

IP Addresses ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Netmask Usage ,[object Object],[object Object],[object Object],Same netmask

Netmask Examples ? S= 128.194.100.10 M= 255.255.255.0 result 128.194.100.0 D= 128.194.200.10 M= 255.255.255.0 result 128.194.200.0 Not Equal S= 128.194.12.10 M= 255.255.255.0 result 128.194.12.0 S= 67.194.18.10 M= 255.255.240.0 result 67.194.16.0 D= 128.194.12.110 M= 255.255.255.0 result 128.194.12.0 D= 67.194.10.10 M= 255.255.240.0 result 67.194. 0.0 ?

Special Address Conventions ,[object Object],[object Object],[object Object],[object Object],[object Object],all 0’s 127 anything (usually 1) net host all 0’s all 1’s all 1’s

IP Header 0 16 31 VERS HLEN SERVICE TYPE TOTAL LENGTH FLAGS FRAGMENT OFFSET IDENTIFICATION TIME TO LIVE PROTOCOL HEADER CHECKSUM SOURCE IP ADDRESS DESTINATION IP ADDRESS 19 8 4 IP OPTIONS (IF ANY) PADDING DATA ... 24

IP Packet Handling (rcv) receiving Transport Layer (TCP or UDP) Sockets IP Link {DIX Type or 802.3 DSAP} Other Physical

IP Packet Handling (xmit) sending Local or Non-Local ? ARP Search Routing Table Found! Missing! ICMP Error Send locally...

Bridges or Routers A B C D 1 2 3 4 5 Address & Netmask 1: 131.122.24.12 255.255.255.0 2: 131.122.31.253 255.255.255.0 3: 131.121.18.12 255.255.240.0 4: 131.121.24.18 255.255.240.0 5: 131.121.31.254 255.255.240.0

ICMP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Network

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