Tcp/Ip; Addressing - Compaq 222863-001 - TaskSmart W2200 Model 10 Administration Manual

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Figure B-2. Ethernet

TCP/IP

Transmission Control Protocol/Internet Protocol (TCP/IP) was previously
briefly mentioned and now can be covered in more detail. Internet Protocol
(IP) is equivocal to the Network layer or Layer 3 of the ISO/OSI reference
model. IP is responsible for addressing and routing packets. Packets are groups
of data with a heading that carry data from source to destination. The IP layer
can further divide a piece of data independent of the TCP layer because both
processes are independent of each other. A more definitive understanding of
TCP/IP may be sought by the user; but for the purpose of this networking
overview, it is most important to understand the address scheme.
TCP is found at the Transport layer or Layer 4 of the ISO/OSI reference
model. Because of unreliable network conditions, TCP was designed, to
ensure the successful transfer of a message between the origination and
destination. TCP breaks up the data that it gets from the upper layers into
pieces, which simplifies the transmission process. However, the TCP is also
responsible for assembling the message at the other end and requesting pieces
not received.

Addressing

Addressing a network is imperative if there is to be any communication
between systems. There are two types of addresses when referring to
networks. The first is a hard-wired NIC address that is associated with a
computer that is connected to a specific local area network (LAN). The
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Networking Basics B-5
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