C839V5/D334 ADDITIONAL PRACTICE.
EXAM 2025 QUESTIONS AND ANSWERS
128 - ANS The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - ANS Hashing involves taking a _____ length input and producing a _____
length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - ANS The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - ANS The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
1 @COPYRIGHT THESTAR 2025/2026
,Transport - ANS IPSec ______ mode involves "end-to-end" encryption; i.e. data remains
encrypted from the time it leaves a sender's device to the time it arrives at the receiver's
device.
A. Tunnel
B. Transport
C. Trusted
Tunnel - ANS IPSec ______ mode involves encryption from gateway to gateway, i.e. just
through the public network space.
A. Tunnel
B. Transport
C. Trusted
Tunnel
Remember, with tunnel mode, encryption does not happen until just before it leaves the local
network. Traffic likely remains unencrypted between the end user device and the local network
boundary. - ANS A security analyst on a local network using monitoring tools is likely to only
be able to read contents of traffic encrypted using IPSec ______ mode.
A. Tunnel
B. Transport
C. Trusted
Chaskey - ANS _____ is a lightweight cryptography method for signing messages (MAC). It
boasts a relatively undemanding hardware implementation (only ~3,333 gates required at
1MHz clock rate) making it suitable for IoT implementation.
128 - ANS Chaskey has a key size of _____ bits.
A. 256
B. 128
2 @COPYRIGHT THESTAR 2025/2026
,C. 80
salt - ANS A weakness of one-way hashing is that the same piece of plaintext will result in the
same ciphertext unless _____ is applied.
A. Salt
B. Ash
C. Ether
40 - ANS The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048 - ANS RC4 is a symmetric stream cipher with a variable key size up to a max of _____
bits.
A. 256
B. 2048
C. 1024
Data Encryption Standard (DES) - ANS _____ has a block size of 64 bits, key size of 56 bits,
and 16 rounds of substitution & transposition.
A. DES
B. AES
C. RC4
rainbow table - ANS A(n) _____ is a collection of precomputed hash values of actual plaintext
passwords used for password cracking.
A. initialization vector
B. key pair
3 @COPYRIGHT THESTAR 2025/2026
, C. rainbow table
.cer - ANS _____ is a common x.509 certificate file type that is used with both PEM and DER
formats.
A. .crt
B. .cer
C. .der
Triple Data Encryption Standard (3DES) - ANS _____ has a block size of 64 bits, key size of
112 bits, and 48 rounds of substitution & transposition.
A. DES
B. RSA
C. 3DES
128, 192, 256 - ANS Key sizes used with the Advanced Encryption Standard (AES) include
_____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - ANS The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256
80 - ANS Skipjack is a symmetric block cipher that uses a ______ bit key.
A. 64
B. 80
C. 112
4 @COPYRIGHT THESTAR 2025/2026
EXAM 2025 QUESTIONS AND ANSWERS
128 - ANS The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - ANS Hashing involves taking a _____ length input and producing a _____
length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - ANS The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - ANS The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
1 @COPYRIGHT THESTAR 2025/2026
,Transport - ANS IPSec ______ mode involves "end-to-end" encryption; i.e. data remains
encrypted from the time it leaves a sender's device to the time it arrives at the receiver's
device.
A. Tunnel
B. Transport
C. Trusted
Tunnel - ANS IPSec ______ mode involves encryption from gateway to gateway, i.e. just
through the public network space.
A. Tunnel
B. Transport
C. Trusted
Tunnel
Remember, with tunnel mode, encryption does not happen until just before it leaves the local
network. Traffic likely remains unencrypted between the end user device and the local network
boundary. - ANS A security analyst on a local network using monitoring tools is likely to only
be able to read contents of traffic encrypted using IPSec ______ mode.
A. Tunnel
B. Transport
C. Trusted
Chaskey - ANS _____ is a lightweight cryptography method for signing messages (MAC). It
boasts a relatively undemanding hardware implementation (only ~3,333 gates required at
1MHz clock rate) making it suitable for IoT implementation.
128 - ANS Chaskey has a key size of _____ bits.
A. 256
B. 128
2 @COPYRIGHT THESTAR 2025/2026
,C. 80
salt - ANS A weakness of one-way hashing is that the same piece of plaintext will result in the
same ciphertext unless _____ is applied.
A. Salt
B. Ash
C. Ether
40 - ANS The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048 - ANS RC4 is a symmetric stream cipher with a variable key size up to a max of _____
bits.
A. 256
B. 2048
C. 1024
Data Encryption Standard (DES) - ANS _____ has a block size of 64 bits, key size of 56 bits,
and 16 rounds of substitution & transposition.
A. DES
B. AES
C. RC4
rainbow table - ANS A(n) _____ is a collection of precomputed hash values of actual plaintext
passwords used for password cracking.
A. initialization vector
B. key pair
3 @COPYRIGHT THESTAR 2025/2026
, C. rainbow table
.cer - ANS _____ is a common x.509 certificate file type that is used with both PEM and DER
formats.
A. .crt
B. .cer
C. .der
Triple Data Encryption Standard (3DES) - ANS _____ has a block size of 64 bits, key size of
112 bits, and 48 rounds of substitution & transposition.
A. DES
B. RSA
C. 3DES
128, 192, 256 - ANS Key sizes used with the Advanced Encryption Standard (AES) include
_____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - ANS The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256
80 - ANS Skipjack is a symmetric block cipher that uses a ______ bit key.
A. 64
B. 80
C. 112
4 @COPYRIGHT THESTAR 2025/2026
