UDP - User Datagram Protocol

• Protocol used for connectionless routing in TCP/IP suite (no acks, no flow control)

• Uses only a small packet header

  • Only 8 bytes containing only 4 fields:
    • Source port
    • Destination port
    • Message length
    • Header checksum

• Commonly used for control messages that are usually small, such as DNS, DHCP, RIP and SNMP.

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