TCP/IP Networks

• TCP/IP have become the most commonly used data communication protocols.
• TCP stands for Transport Control Protocol; it implements the Transport Layer.
• IP stands for Internet Protocol; it implements the network layer.
• Recall that protocols prepend headers to packets to convey information to peers.
• The use of headers can be compared to an envelope: the contents is transparent to the postal system; address information is on the outside.
• We will consider packet headers used in TCP and IP to draw conclusions about the functionality provided by these protocols.