Free CREST CREST-CPSA Exam Questions

Become CREST Certified with updated CREST-CPSA exam questions and correct answers

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Total 359 Questions | Updated On: Jan 12, 2026

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Question 1

What is a Thick client?

A : A computer that uses remote desktop sessions

B : A computer that holds the software and updates for the clients.

C : A computer always distributed over network.

D : It is a networked computer system with most resources installed locally, rather than distributed over a network.

E : A computer that provides network information to Thin clients.

Answer: D

Question 2

In CBC mode, how is each plaintext block encrypted before being XORed with the previous ciphertext block?

A : XORing each plaintext block with the previous ciphertext block before encryption

B : Using a cryptographic nonce as the encryption key

C : Using a unique initialization vector (IV) for each block

D : Using a different key for each block

E : Using the same encryption key for each block

Answer: E

Question 3

What are the SIP and RTP protocols used for in VoIP?

A : SIP and RTP are competing protocols that are both used for audio data transmission.

B : RTP is used for setting up and closing down calls, and SIP is used for audio data transmission.

C : SIP and RTP are competing protocols that are both used for setting up and tearing down calls.

D : SIP is used for setting up and closing down calls, and RTP is used for audio data transmission.

E : SIP is used for setting up and closing down calls, but RTP is nothing to do with VoIP.

Answer: D

Question 4

How many possible hosts are in class A network?

A : 16384

B : 65536

C : 512

D : 8096

E : 16777214

Answer: E

Question 5

What is the hash length of MD5?

A : 8 Byte or 36 bits

B : 16 Bytes with 128 bits

C : 32 Byte or 256 bits

D : 12 Byte or 192 bits

E : 64 Byte or 512 bits

Answer: B

Page: 1 / 72

Total 359 Questions | Updated On: Jan 12, 2026

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