问题:
A . A value of 4 represents the "Implicit NULL Label."
B . A value of 0 represents the "IPv4 Explicit NULL Label."
C . A value of 1 represents the "Router Alert Label". The use of this label is analogous to the use of the"Router Alert Option" in IP packets (for example, ping with record route option)
D . A value of 2 represents the "IPv6 Explicit NULL Label"
E . A value of 1 represents the "IPv1 Explicit NULL Label"
F . A value of 3 represents the "Implicit NULL Label"
● 参考解析
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