C839v5/D334 Additional Practice Questions and Answers Already Passed Rated A+
128 - AnswersThe hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - AnswersHashing involves taking a _____ length input and producing a _____ length
output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - AnswersThe hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - AnswersThe hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
Transport - AnswersIPSec ______ 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 - AnswersIPSec ______ 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. -
AnswersA 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 - Answers_____ 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 - AnswersChaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt - AnswersA 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 - AnswersThe minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048 - AnswersRC4 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) - Answers_____ 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 - AnswersA(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 - Answers_____ 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) - Answers_____ 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 - AnswersKey sizes used with the Advanced Encryption Standard (AES) include _____.
_____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - AnswersThe Advanced Encryption Standard (AES) operates using _____ bit blocks.
128 - AnswersThe hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed - AnswersHashing involves taking a _____ length input and producing a _____ length
output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160 - AnswersThe hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128 - AnswersThe hash value in bits for MD4 is ____.
A. 128
B. 160
C. 256
Transport - AnswersIPSec ______ 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 - AnswersIPSec ______ 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. -
AnswersA 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 - Answers_____ 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 - AnswersChaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt - AnswersA 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 - AnswersThe minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048 - AnswersRC4 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) - Answers_____ 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 - AnswersA(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 - Answers_____ 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) - Answers_____ 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 - AnswersKey sizes used with the Advanced Encryption Standard (AES) include _____.
_____, or _____.
A. 10, 12, 14
B. 128, 192, 256
C. 32, 64, 80
128 - AnswersThe Advanced Encryption Standard (AES) operates using _____ bit blocks.
