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Q. Which of the following is true about ICMP messages?

Q. Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC).

Q. Adding 1 and 1 in modulo-2 arithmetic results in _________.

Q. Dialog control is the function of which layer

Q. What is Unicode?

Q. A(n) _________ can be used to preserve the integrity of a document or a message.

Q. ________ means to prove the identity of the entity that tries to access the system's resources.

Q. A straight permutation cipher or a straight P-box has same number of inputs as

Q. Substitutional cipers are