Monday, June 22, 2009

Internet Layer

IP Header

Protocol Field in IP Header


Protocol Field in IP Header

ICMP

Internet Control Message Protocol (ICMP) works at the Network layer and is used by IP for many different services.
  • ICMP is a management protocol and messaging service provider for IP.
  • Its messages are carried as IP datagrams.
ICMP packets have the following characteristics:
  • They can provide hosts with information about network problems.
  • They are encapsulated within IP datagrams.

E0 of LAB_B goes down. What happens?


ARP
ARP resolves IP addresses to Ethernet (MAC) addresses.


RARP
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