Windows Networking Tools

33

3

addrESSIng at layErS

2 and 3 and thE

IntErnEt Protocol

In this chapter we continue to acquire a foundation of knowledge

concerning both Ethernet LANs and the TCP/IP protocol suite by

focusing attention upon the data link and network layer address-

ing as well as the Internet Protocol (IP), to include the Address

Resolution Protocol (ARP) and both versions of Internet Control

Message Protocol (ICMP). IP represents both the network layer

protocol in the TCP/IP protocol suite and the data delivery mech-

anism, which enables packets to be routed from source to desti-

nation. However, when data are delivered to a device, such as a

workstation on a LAN or even a computer accessing the Internet

via a cable modem, the physical interface at the data ...