Which of the following description about verifying whether a received Hello message is legal is wrong?
A . If the network type of the receiving port is point-to-point or virtual link, the Network Mask field is not checked
B . The RouterDeadIntera1 field in the received Hello message must be consistent with the configuration of the receiving port
C . If the network type of the receiving port is broadcast, point-to-multipoint or NBMA, the Network Mask field in the received Hello message may be inconsistent with that of the interface
D . The E-bit in the Options field in the received Hello message must be consistent with the configuration of the relevant area
Answer: C
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