©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
C839v5/D334 Additional Practice. Exam
Questions And Answers |Latest 2025 |
Guaranteed Pass
The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256 - Answer✔128
Hashing involves taking a _____ length input and producing a _____ length output (message
digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable - Answer✔variable; fixed
The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256 - Answer✔160
The hash value in bits for MD4 is ____.
A. 128
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, ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
B. 160
C. 256 - Answer✔128
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 - Answer✔Transport
IPSec ______ mode involves encryption from gateway to gateway, i.e. just through the public
network space.
A. Tunnel
B. Transport
C. Trusted - Answer✔Tunnel
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 - Answer✔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.
_____ 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. - Answer✔Chaskey
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Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80 - Answer✔128
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 - Answer✔salt
The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64 - Answer✔40
RC4 is a symmetric stream cipher with a variable key size up to a max of _____ bits.
A. 256
B. 2048
C. 1024 - Answer✔2048
_____ has a block size of 64 bits, key size of 56 bits, and 16 rounds of substitution &
transposition.
A. DES
B. AES
C. RC4 - Answer✔Data Encryption Standard (DES)
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, ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
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 - Answer✔rainbow table
_____ is a common x.509 certificate file type that is used with both PEM and DER formats.
A. .crt
B. .cer
C. .der - Answer✔.cer
_____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of substitution &
transposition.
A. DES
B. RSA
C. 3DES - Answer✔Triple Data Encryption Standard (3DES)
Key sizes used with the Advanced Encryption Standard (AES) include _____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80 - Answer✔128, 192, 256
The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256 - Answer✔128
4
C839v5/D334 Additional Practice. Exam
Questions And Answers |Latest 2025 |
Guaranteed Pass
The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256 - Answer✔128
Hashing involves taking a _____ length input and producing a _____ length output (message
digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable - Answer✔variable; fixed
The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256 - Answer✔160
The hash value in bits for MD4 is ____.
A. 128
1
, ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
B. 160
C. 256 - Answer✔128
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 - Answer✔Transport
IPSec ______ mode involves encryption from gateway to gateway, i.e. just through the public
network space.
A. Tunnel
B. Transport
C. Trusted - Answer✔Tunnel
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 - Answer✔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.
_____ 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. - Answer✔Chaskey
2
, ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80 - Answer✔128
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 - Answer✔salt
The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64 - Answer✔40
RC4 is a symmetric stream cipher with a variable key size up to a max of _____ bits.
A. 256
B. 2048
C. 1024 - Answer✔2048
_____ has a block size of 64 bits, key size of 56 bits, and 16 rounds of substitution &
transposition.
A. DES
B. AES
C. RC4 - Answer✔Data Encryption Standard (DES)
3
, ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+
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 - Answer✔rainbow table
_____ is a common x.509 certificate file type that is used with both PEM and DER formats.
A. .crt
B. .cer
C. .der - Answer✔.cer
_____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of substitution &
transposition.
A. DES
B. RSA
C. 3DES - Answer✔Triple Data Encryption Standard (3DES)
Key sizes used with the Advanced Encryption Standard (AES) include _____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80 - Answer✔128, 192, 256
The Advanced Encryption Standard (AES) operates using _____ bit blocks.
A. 128
B. 192
C. 256 - Answer✔128
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