June 2004
Intermediate to advanced
840 pages
39h 47m
English
Content preview from The Internet and Its Protocols
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1.7 The Protocols at a Glance 19
Figure
1.16 An 802.3 frame showing 802.2 data encapsulation with a SNAP header.
Another important encapsulation is the Subnetwork Access Protocol
(SNAP) header. This may be used on its own or in association with an 802.2
header, as shown in Figure 1.16. When a SNAP header is used with 802.2, the
DSAP and SSAP are set to 0x AA and the control byte is set to 0x 03 to indicate
that the SNAP header follows.
The SNAP header fields are used to identify the payload protocol. The
Organizationally Unique Identifier (OUI) provides a way to manage different ...
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