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C839v5/D334 Additional Practice Exam
Questions With Correct Answers 100%
Verified
128 - Answer✔The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - Answer✔Hashing involves taking a _____ length input and producing a _____
length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - Answer✔The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - Answer✔The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
Transport - Answer✔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
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B. Transport
C. Trusted
Tunnel - Answer✔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. - Answer✔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 - Answer✔_____ 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 - Answer✔Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt - Answer✔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 - Answer✔The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
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2048 - Answer✔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) - Answer✔_____ 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 - Answer✔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 - Answer✔_____ 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) - Answer✔_____ 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 - Answer✔Key sizes used with the Advanced Encryption Standard (AES) include
_____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - Answer✔The Advanced Encryption Standard (AES) operates using _____ bit blocks.
C839v5/D334 Additional Practice Exam
Questions With Correct Answers 100%
Verified
128 - Answer✔The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - Answer✔Hashing involves taking a _____ length input and producing a _____
length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - Answer✔The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - Answer✔The hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
Transport - Answer✔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
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1/29/2025. ✔✔
B. Transport
C. Trusted
Tunnel - Answer✔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. - Answer✔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 - Answer✔_____ 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 - Answer✔Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt - Answer✔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 - Answer✔The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1/29/2025. ✔✔
2048 - Answer✔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) - Answer✔_____ 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 - Answer✔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 - Answer✔_____ 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) - Answer✔_____ 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 - Answer✔Key sizes used with the Advanced Encryption Standard (AES) include
_____. _____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - Answer✔The Advanced Encryption Standard (AES) operates using _____ bit blocks.
