You want to use IS-IS on a GRE interface where the underlying Layer 3 MTU is 1500. Which statement is correct?

Question

Options

• AIS-IS can be used because every IS-IS interface must be capable of transmitting packets at least
• BIS-IS cannot be used because the IS-IS hello is not allowed to be fragmented and has the DF bit
• CIS-IS can be used, but the networking device directly attached to the circuit must be capable of
• DIS-IS cannot be used, but the router can enable a GRE key that serves the same function as IS-

• A
  8% (3)
• B
  3% (1)
• C
  70% (26)
• D
  19% (7)

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