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UDP & TCP

UDP & TCP. BS IT 4 th Semester By: Muhammad Hanif. User Datagram Protocol & Transmission Control Protocol. Quote of the day……. Many of life's failures are people who did not realize how close they were to success when they gave up. ~Thomas Edison Have a blessed day!.

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UDP & TCP

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  1. UDP & TCP BS IT 4th Semester By: Muhammad Hanif User Datagram Protocol & Transmission Control Protocol

  2. Quote of the day…… • Many of life's failures are people who did not realize how close they were to success when they gave up. • ~Thomas Edison Have a blessed day!

  3. Transport Protocols • Provide logical communication between application processes running on different hosts • Run on end hosts • Sender: breaks application messages into segments, and passes to network layer • Receiver: reassembles segments into messages, passes to application layer • Multiple transport protocol available to applications • Internet: TCP and UDP

  4. UDP BS IT 4th Semester By: Muhammad Hanif User Datagram Protocol

  5. Position of UDP in the TCP/IP protocol suite

  6. User Datagram Protocol • UDP is an end-to-end or transport protocol that allows an application program to serve as the end-point of communication

  7. UDP Characteristics • End-to-end • Connectionless • Message-oriented • Each UDP message must fit within one IP datagram • UDP message can be lost, duplicated, or corrupted • Suitable for applications that can tolerate delivery errors • One-to-one, one-to-many • E.g. Internet Telephony, Conference Call

  8. UDP Format

  9. UDP Format Detail • Source Port/Destination Port: A port Virtual circuit between two communicating processes on two different computers or devices • The source port is the port on the sending device. • The destination port is a TCPport on a receiving device that corresponds with the source port on the sending device • Length: contains information about the length of the frame • Checksum: This field is used to detect errors over the entire user datagram (header plus data). • Placed in the frame by the sending station. • The recipient also calculates the checksum and compares its calculation with the value in the checksum field.

  10. Encapsulation and Decapsulation

  11. TCP BS IT 4th Semester By: Muhammad Hanif Transmission Control Protocol

  12. Quote of the day…… • Be noble minded! Our own heart, and not other men's opinions of us, forms our true honor. • - Johann Friedrich • Johann Friedrich was a German anatomist.

  13. Position of TCP in the TCP/IP protocol suite

  14. TCP Features • Reliable, in-order delivery (TCP) • Connection Oriented • Discarding of corrupted packets • Retransmission of lost packets • Flow control

  15. Establishing a TCP Connection • Three-way handshake to establish connection • Host A sends a SYN (open) to the host B • Host B returns a SYN acknowledgment (SYN ACK) • Host A sends anACK to acknowledge the SYN ACK

  16. TCP segment format

  17. Control Fields

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