WGU C839V5/D334 PASSED Exam Question
and Answer (2026/2027) | Simplified Review
Guide | 100% Verified Answers
• 128 -✓✓ The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
• variable; fixed -✓✓ Hashing involves taking a _____ length input and producing a
_____ length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
• 160 -✓✓ The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
• 128 -✓✓ The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
• Transport -✓✓ 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 -✓✓ 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. -✓✓ 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 -✓✓ _____ 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 -✓✓ Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
• salt -✓✓ 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 -✓✓ The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
• 2048 -✓✓ 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) -✓✓ _____ 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 -✓✓ A(n) _____ is a collection of precomputed hash values of actual
plaintext passwords used for password cracking.
A. initialization vector
B. key pair
C. rainbow table
, • .cer -✓✓ _____ 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) -✓✓ _____ 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 -✓✓ Key sizes used with the Advanced Encryption Standard (AES)
include _____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
• 128 -✓✓ The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256
• 80 -✓✓ Skipjack is a symmetric block cipher that uses a ______ bit key.
A. 64
B. 80
C. 112
• 128-bit key size; 64-bit IV -✓✓ Enocoro operates with a key size of ______ bits and an
initialization vector (IV) of _____ bits.
A. 80; 80
B. 128; 64
C. 80; 64
• 64 -✓✓ Skipjack has a block size of _____bits.
A. 64
B. 80
C. 128
• Light-weight hashing algorithms -✓✓ PHOTON, SPONGENT, Lesamnta-LW, and
Quark are examples of light-weight _____.
A. hashing algorithms
B. public-key algorithms
C. symmetric block ciphers
and Answer (2026/2027) | Simplified Review
Guide | 100% Verified Answers
• 128 -✓✓ The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
• variable; fixed -✓✓ Hashing involves taking a _____ length input and producing a
_____ length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
• 160 -✓✓ The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
• 128 -✓✓ The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
• Transport -✓✓ 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 -✓✓ 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. -✓✓ 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 -✓✓ _____ 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 -✓✓ Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
• salt -✓✓ 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 -✓✓ The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
• 2048 -✓✓ 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) -✓✓ _____ 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 -✓✓ A(n) _____ is a collection of precomputed hash values of actual
plaintext passwords used for password cracking.
A. initialization vector
B. key pair
C. rainbow table
, • .cer -✓✓ _____ 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) -✓✓ _____ 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 -✓✓ Key sizes used with the Advanced Encryption Standard (AES)
include _____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
• 128 -✓✓ The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256
• 80 -✓✓ Skipjack is a symmetric block cipher that uses a ______ bit key.
A. 64
B. 80
C. 112
• 128-bit key size; 64-bit IV -✓✓ Enocoro operates with a key size of ______ bits and an
initialization vector (IV) of _____ bits.
A. 80; 80
B. 128; 64
C. 80; 64
• 64 -✓✓ Skipjack has a block size of _____bits.
A. 64
B. 80
C. 128
• Light-weight hashing algorithms -✓✓ PHOTON, SPONGENT, Lesamnta-LW, and
Quark are examples of light-weight _____.
A. hashing algorithms
B. public-key algorithms
C. symmetric block ciphers
