UNCC ITIS 3100 - Networks And TCPIP-Part2 (36 pages)

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Networks And TCPIP-Part2



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Networks And TCPIP-Part2

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Pages:
36
School:
University of North Carolina - Charlotte
Course:
Itis 3100 - Introduction to IT Infrastructure Systems
Introduction to IT Infrastructure Systems Documents

Unformatted text preview:

Networks and TCP IP Part 2 Transport Protocols TCP vs UDP TCP Transmission Control Protocol More complicated Ensures delivery UDP User Datagram Protocol Simpler protocol Delivery not guaranteed Others DCCP Datagram Congestion Control Protocol SCTP Stream Control Transmission Protocol TCP Transmission Control Protocol TCP Transmission Control Protocol How data is transmitted between addresses Data broken into packets Numbered Each packet sent most practical way at that moment Traffic Failures Etc Reassembled at destination TCP TCP adds a great deal of functionality to the IP service it is layered over Streams TCP data is organized as a stream of bytes much like a file The datagram nature of the network is concealed A mechanism the Urgent Pointer exists to let out of band data be specially flagged Reliable delivery Sequence numbers are used to coordinate which data has been transmitted and received TCP will arrange for retransmission if it determines that data has been lost Network adaptation TCP will dynamically learn the delay characteristics of a network and adjust its operation to maximize throughput without overloading the network Flow control TCP manages data buffers and coordinates traffic so its buffers will never overflow Fast senders will be stopped periodically to keep up with slower receivers TCP Header TCP Header Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 Source Port Destination Port Sequence Number Acknowledgment Number Data U A P R S F Offset Reserved R C S S Y I Window G K H T N N Checksum Urgent Pointer Options Padding data UDP Header 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 Source Port Destination Port Length Checksum Data Ports What and Why are They Typically There is only one network access point to the internet Multiple systems and programs want to access the internet How do programs and systems keep their conversations straight Ports An extra



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