The following are statements about fields in the Hello packet that must match in order to form an OSPF adjacency. Which statement is correct?
The area ID does not have to match.
The value of the E bit in the options field does not have to match.
The value of the Hello interval does not have to match.
The value of the network mask does not have to match.
The area ID, the E bit value, the Hello interval and network mask must all match.
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