Network Security Questions

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21.

DES is a(n) ________ method adopted by the U.S. government.

A

symmetric-key

B

asymmetric-key

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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22.

DES has an initial and final permutation block and _________ rounds

A

14

B

15

C

16

D

none of the above

Correct Answer: C

None.

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23.

The DES function has _______ components

A

2

B

3

C

4

D

5

Correct Answer: C

None.

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24.

DES uses a key generator to generate sixteen _______ round keys

A

32-bit

B

48-bit

C

54-bit

D

42-bit

Correct Answer: B

None.

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25.

________ DES was designed to increase the size of the DES key

A

Double

B

Triple

C

Quadruple

D

none of the above

Correct Answer: B

None.

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26.

_______ is a round cipher based on the Rijndael algorithm that uses a 128-bit block of data

A

AEE

B

AED

C

AER

D

AES

Correct Answer: D

None.

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27.

AES has _____ different configurations

A

two

B

three

C

four

D

five

Correct Answer: B

None.

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28.

ECB and CBC are ________ ciphers

A

block

B

stream

C

field

D

none of the above

Correct Answer: A

None.

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29.

One commonly used public-key cryptography method is the ______ algorithm

A

RSS

B

RAS

C

RSA

D

RAA

Correct Answer: C

None.

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30.

. The ________ method provides a one-time session key for two parties

A

Diffie-Hellman

B

RSA

C

DES

D

AES

Correct Answer: A

None.

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