Question

Select/provide the correct term for the following statements.

5.External devices such as firewalls cannot provide access control services. (True/False)

6.The ciphertext-only attack is the easiest to defend against. (True/False)

7.A brute-force approach involves trying every possible key until an intelligible translation of the ciphertext into plaintext is obtained. (True/False)

8.The Feistel structure is a particular example of the more general structure used by all symmetric block ciphers. (True/False)

9.User authentication is the basis for most types of access control and for user accountability. (True/False)

Answer 1

=====Answer=====

Answer 5- False

Explanation:

• External devices such as firewalls cannot allow for authentication and gain access for security reason.

Answer 6- True

Explanation:

• The ciphertext simply affliction is the well-fixed to support against.

Answer 7- True

Explanation:

• It constructs too troublesome to encounter the key from the ciphertext and the planning of the determines of overmuch or every of the bits in the ciphertext will be impressed.

Answer 8- True

Explanation:

• Its organize is a specific representative of the greater extent general structure applied by completely symmetric block ciphers.

Answer 9- True

Explanation:

• Basically, user authentication is required to access by accountability is a requirement part of collection security and access control is used for authentication and gain access for security reason.

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