December 2001
Intermediate to advanced
656 pages
27h 19m
English
Content preview from Networking Explained, 2nd Edition
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424 Networking Explained, Second Edition
2. I know about connection-oriented, full-duplex, and point-to-point. What is “cell-
switched”?
The concept of cell-switched is very similar to frame relay (Chapter 12), which uses
switches to transfer variable-length frames within the frame relay cloud from source to des-
tination. Instead of using frames, ATM uses fixed-length cells, which contain exactly 53
bytes—48 bytes for user data and 5 bytes for overhead. As a result, ATM is sometimes
referred to as cell relay, which dates back to the late 1960s. The concept of cell relay is pred-
icated on time domain multiplexing and packet-switching. The term asynchr ...
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