is a 64-bit random number used by the requester to prevent replay attacks by mal-
icious agents. The Reply Code in the Reply message indicates the success or failure of
the request--a host of rejection reasons are allowed, as shown in Table 15.5.
Table 15.4 The Capability Flags Within the Mobile IP Registration
Request Message
Flag Meaning
M
This bit indicates that the mobile node is requesting that this
binding supplement rather than replace the previous binding.
The mobile node requests that broadcast datagrams be
tunneled to it along with any datagrams that are specifically
addressed to it.
The mobile node will ...
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