C839v5/D334 Additional Practice \| \| \|
questions with answers \| \|
The hash value in bits for MD5 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
C. 256 - CORRECT ANSWERS ✔✔128
\| \| \| \| \|
Hashing involves taking a _____ length input and producing a _____ length
\| \| \| \| \| \| \| \| \| \| \| \|
output (message digest).
\| \|
A. fixed; fixed
\| \|
B. variable; fixed
\| \|
C. fixed; variable - CORRECT ANSWERS ✔✔variable; fixed
\| \| \| \| \| \| \|
The hash value in bits for SHA-1 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
C. 256 - CORRECT ANSWERS ✔✔160
\| \| \| \| \|
The hash value in bits for MD4 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
,C. 256 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Transport
\| \| \| \| \|
IPSec ______ mode involves encryption from gateway to gateway, i.e. just
\| \| \| \| \| \| \| \| \| \| \|
through the public network space. \| \| \| \|
A. Tunnel
\|
B. Transport
\|
C. Trusted - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔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. -
\| \| \| \| \| \| \| \| \| \| \| \|
CORRECT ANSWERS ✔✔Chaskey \| \|
Chaskey has a key size of _____ bits.\| \| \| \| \| \| \|
A. 256\|
B. 128
\|
C. 80 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔salt
\| \| \| \| \|
The minimum recommended key size to use with RC4 is _____ bits.
\| \| \| \| \| \| \| \| \| \| \|
A. 40 \|
B. 20
\|
C. 64 - CORRECT ANSWERS ✔✔40
\| \| \| \| \|
RC4 is a symmetric stream cipher with a variable key size up to a max of
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
_____ bits. \|
A. 256\|
, B. 2048
\|
C. 1024 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Data Encryption Standard (DES)
\| \| \| \| \| \| \| \|
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 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔.cer
\| \| \| \| \|
_____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
substitution & transposition. \| \|
A. DES
\|
questions with answers \| \|
The hash value in bits for MD5 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
C. 256 - CORRECT ANSWERS ✔✔128
\| \| \| \| \|
Hashing involves taking a _____ length input and producing a _____ length
\| \| \| \| \| \| \| \| \| \| \| \|
output (message digest).
\| \|
A. fixed; fixed
\| \|
B. variable; fixed
\| \|
C. fixed; variable - CORRECT ANSWERS ✔✔variable; fixed
\| \| \| \| \| \| \|
The hash value in bits for SHA-1 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
C. 256 - CORRECT ANSWERS ✔✔160
\| \| \| \| \|
The hash value in bits for MD4 is ____.
\| \| \| \| \| \| \| \|
A. 128
\|
B. 160
\|
,C. 256 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Transport
\| \| \| \| \|
IPSec ______ mode involves encryption from gateway to gateway, i.e. just
\| \| \| \| \| \| \| \| \| \| \|
through the public network space. \| \| \| \|
A. Tunnel
\|
B. Transport
\|
C. Trusted - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔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. -
\| \| \| \| \| \| \| \| \| \| \| \|
CORRECT ANSWERS ✔✔Chaskey \| \|
Chaskey has a key size of _____ bits.\| \| \| \| \| \| \|
A. 256\|
B. 128
\|
C. 80 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔salt
\| \| \| \| \|
The minimum recommended key size to use with RC4 is _____ bits.
\| \| \| \| \| \| \| \| \| \| \|
A. 40 \|
B. 20
\|
C. 64 - CORRECT ANSWERS ✔✔40
\| \| \| \| \|
RC4 is a symmetric stream cipher with a variable key size up to a max of
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
_____ bits. \|
A. 256\|
, B. 2048
\|
C. 1024 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Data Encryption Standard (DES)
\| \| \| \| \| \| \| \|
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 - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔.cer
\| \| \| \| \|
_____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
substitution & transposition. \| \|
A. DES
\|
