November 2001
Intermediate to advanced
320 pages
7h 58m
English
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6.2. Chapter Summary
Layer 4—UDP
UDP is a streamlined transport layer protocol.
UDP incurs minimal CPU overhead and offers higher performance.
UDP requires no session establishment prior to data transmission.
Delivery of UDP datagrams is unacknowledged by the recipient.
Lack of flow control makes UDP dependent on link-layer services such as 802.3x.
UDP with 802.3x flow control is analogous to class 3 Fibre Channel service.
In the event of packet loss, upper layer applications must recover or retransmit.
UDP Port Numbers
UDP provides identifying port numbers that associate transactions with specific upper layer applications.
Port numbers for both UDP and TCP are 16-bit integers.
Assignment of port numbers also enables concurrent ...
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