CompTIA PenTest+ Certification All-in-One Exam Guide (Exam PT0-001) by Raymond Nutting

Author:Raymond Nutting [Nutting, Raymond]
Language: eng
Format: azw3
Publisher: McGraw-Hill Education
Published: 2018-12-14T00:00:00+00:00

Questions and Answers

1. WEP uses an encryption algorithm called RC4, which was developed by Ronald Rivest. RC4 is a ________ cipher, which is a symmetric key cipher used to expand a short key into an infinite pseudo-random keystream.

A. Stream

B. Asymmetric

C. Block

D. Secret

A. RC4 is an older encryption algorithm that helps encrypt WEP networks. RC4 is a stream cipher used to combine plaintext with a pseudo-random keystream.

2. CRC-32 is an algorithm used to verify the integrity of network packets for WEP and is also found in different applications to detect changes in hardware. CRC-32 is based on the original cycle redundancy check and is not recommended for verifying the integrity of modern-day technology due to the fact that _____________. (Select the best answer.)

A. It is an older form of integrity checking software that has multiple vulnerabilities.

B. CRC-32 is a variant of CRC, which is based on a noncryptographic algorithm that offers very little assurance with regard to data manipulation.

C. CRC is a variant of CRC-32, which is based on a cryptographic algorithm that offers very little assurance with regard to data manipulation.

D. It is an older form of integrity checking software that has few to no vulnerabilities.

B. CRC-32 is a noncryptographic algorithm based off of CRC (cyclic redundancy check). Since the algorithm is based on code generation and cryptography, it provides little value with regard to integrity, as this value can easily be reproduced.

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