May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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140 Data Communications and Computer Networks
provides the negotiation mechanism. Each LCP packet is encapsulated in the payload field of PPP frame
and a value 0xC021 (hexadecimal) is placed in the protocol field of PPP frame to indicate that PPP is
carrying an LCP frame (Figure 7.10).
Flag Address Control 0xC021 Payload FCS Flag
InformationLengthIDCodeLCP packet
Figure 7.10 LCP Packet Encapsulated into PPP Frame
The frame structure of LCP consists of various subfields, which are described as follows
Code: It is a one-byte long field that defines the type of LCP packet. There are 11 types of LCP
packets that are divided into three categories. ...
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