C839v5/D334 Additional Practice Exam Questions With Correct Answers

C839v5D334 Additional Practice Exam Questions
With Correct Answers


The |hash |value |in |bits |for |MD5 |is |____.

A. |128

B. |160

C. |256 |- |CORRECT |ANSWER✔✔-128



Hashing |involves |taking |a |_____ |length |input |and |producing |a |_____ |length |output |(message |
digest).

A. |fixed; |fixed

B. |variable; |fixed

C. |fixed; |variable |- |CORRECT |ANSWER✔✔-variable; |fixed



The |hash |value |in |bits |for |SHA-1 |is |____.

A. |128

B. |160

C. |256 |- |CORRECT |ANSWER✔✔-160



The |hash |value |in |bits |for |MD4 |is |____.

A. |128

B. |160

C. |256 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-Transport



IPSec |______ |mode |involves |encryption |from |gateway |to |gateway, |i.e. |just |through |the |public |
network |space.

A. |Tunnel

B. |Transport

C. |Trusted |- |CORRECT |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 |- |CORRECT |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. |- |CORRECT |ANSWER✔✔-Chaskey



Chaskey |has |a |key |size |of |_____ |bits.

A. |256

,B. |128

C. |80 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-salt



The |minimum |recommended |key |size |to |use |with |RC4 |is |_____ |bits.

A. |40

B. |20

C. |64 |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-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 |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 |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-128, |192, |256



The |Advanced |Encryption |Standard |(AES) |operates |using |_____ |bit |blocks.

A. |128

B. |192

C. |256 |- |CORRECT |ANSWER✔✔-128



Skipjack |is |a |symmetric |block |cipher |that |uses |a |______ |bit |key.