Question 1

________ is the use of mathematical operations to protect messages travelling between parties or stored on a computer.

Accepted Answer

A)  Cryptography 
B)  Encryption 
C)  Authentication 
D)  Confidentiality 
A)  Cryptography 
B)  Encryption 
C)  Authentication 
D)  Confidentiality

Question 2

A commonly SSL/TLS-aware application is ________.

Accepted Answer

A)  webservice 
B)  database 
C)  Both A and B 
D)  Neither A nor B 
A)  webservice 
B)  database 
C)  Both A and B 
D)  Neither A nor B

Question 3

In MS-CHAP, the ________ creates the response message.

Accepted Answer

A)  supplicant 
B)  verifier 
C)  Both A and B 
D)  Neither A nor B 
A)  supplicant 
B)  verifier 
C)  Both A and B 
D)  Neither A nor B

Question 4

When Emma sends a message to Lucy, Emma will use the public key to encrypt it.

Accepted Answer

A) True 
 B)False

Question 5

SSL/TLS operates at the ________ layer.

Accepted Answer

A)  internet 
B)  transport 
C)  application 
D)  None of the above. 
A)  internet 
B)  transport 
C)  application 
D)  None of the above.

Question 6

In checking the digital signature, the verifier ________.

Accepted Answer

A)  decrypts the digital signature it received with the supplicant's public key to get the message digest 
B)  hashes the plaintext message with the same algorithm used by the sender to get the message digest 
C)  Both A and B 
D)  Neither A nor B 
A)  decrypts the digital signature it received with the supplicant's public key to get the message digest 
B)  hashes the plaintext message with the same algorithm used by the sender to get the message digest 
C)  Both A and B 
D)  Neither A nor B

Question 7

When two parties in an IPsec connection communicate back and forth, there are ________ security associations.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 8

Hashing is a reversible process.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is one of the key lengths offered by AES?

Accepted Answer

A)  112 bits 
B)  192 bits 
C)  Both A and B 
D)  Neither A nor B 
A)  112 bits 
B)  192 bits 
C)  Both A and B 
D)  Neither A nor B

Question 10

In order to be considered strong today, a symmetric encryption key must be at least ________ bits long.

Accepted Answer

A)  6 
B)  8 
C)  100 
D)  1,000 
A)  6 
B)  8 
C)  100 
D)  1,000

Question 11

3DES is ________.

Accepted Answer

A)  very slow 
B)  strong enough for communication in corporations 
C)  expensive in terms of processing cost 
D)  All of the above 
A)  very slow 
B)  strong enough for communication in corporations 
C)  expensive in terms of processing cost 
D)  All of the above

Question 12

Companies transmit over the Internet because the Internet ________.

Accepted Answer

A)  is inexpensive 
B)  is secure 
C)  Both A and B 
D)  Neither A nor B 
A)  is inexpensive 
B)  is secure 
C)  Both A and B 
D)  Neither A nor B

Question 13

The sender the uses public key of the recipient in ________.

Accepted Answer

A)  public key encryption for confidentiality 
B)  public key encryption for authentication 
C)  Both A and B 
D)  Neither A nor B 
A)  public key encryption for confidentiality 
B)  public key encryption for authentication 
C)  Both A and B 
D)  Neither A nor B

Question 14

Replay attacks can be thwarted by using ________.

Accepted Answer

A)  time stamps 
B)  sequence numbers 
C)  nonces 
D)  All of the above. 
A)  time stamps 
B)  sequence numbers 
C)  nonces 
D)  All of the above.

Question 15

An attacker who captures the keying information in Diffie-Hellman key agreement can compute the symmetric session key.

Accepted Answer

A) True 
 B)False

Question 16

________ ciphers leave letters in their original positions.

Accepted Answer

A)  Transposition 
B)  Substitution 
C)  Both A and B 
D)  Neither A nor B 
A)  Transposition 
B)  Substitution 
C)  Both A and B 
D)  Neither A nor B

Question 17

SSL/TLS was developed for remote access VPNs.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following measures do HMACs use?

Accepted Answer

A)  Symmetric key encryption 
B)  Public key encryption 
C)  Hashing 
D)  All of the above 
A)  Symmetric key encryption 
B)  Public key encryption 
C)  Hashing 
D)  All of the above

Question 19

To meet national export limitation in many countries, RC4 often uses a key length of ________ bits.

Accepted Answer

A)  8 
B)  40 
C)  100 
D)  256 
A)  8 
B)  40 
C)  100 
D)  256

Question 20

MS-CHAP provides mutual authentication.

Accepted Answer

A) True 
 B)False

________ is the use of mathematical operations to protect messages travelling between parties or stored on a computer.

A commonly SSL/TLS-aware application is ________.

In MS-CHAP, the ________ creates the response message.

When Emma sends a message to Lucy, Emma will use the public key to encrypt it.

SSL/TLS operates at the ________ layer.

In checking the digital signature, the verifier ________.

When two parties in an IPsec connection communicate back and forth, there are ________ security associations.

Hashing is a reversible process.

Which of the following is one of the key lengths offered by AES?

In order to be considered strong today, a symmetric encryption key must be at least ________ bits long.

3DES is ________.

Companies transmit over the Internet because the Internet ________.

The sender the uses public key of the recipient in ________.

Replay attacks can be thwarted by using ________.

An attacker who captures the keying information in Diffie-Hellman key agreement can compute the symmetric session key.

________ ciphers leave letters in their original positions.

SSL/TLS was developed for remote access VPNs.

Which of the following measures do HMACs use?

To meet national export limitation in many countries, RC4 often uses a key length of ________ bits.

MS-CHAP provides mutual authentication.

The Threat Environment

Planning and Policy

Secure Networks

Access Control

Firewalls

Host Hardening

Application Security

Data Protection

Incident and Disaster Response

Module A: Networking Concepts

Filters

Exam 3: Cryptography

________ is the use of mathematical operations to protect messages travelling between parties or stored on a computer.

A commonly SSL/TLS-aware application is ________.

In MS-CHAP, the ________ creates the response message.

When Emma sends a message to Lucy, Emma will use the public key to encrypt it.

SSL/TLS operates at the ________ layer.

In checking the digital signature, the verifier ________.

When two parties in an IPsec connection communicate back and forth, there are ________ security associations.

Hashing is a reversible process.

Which of the following is one of the key lengths offered by AES?

In order to be considered strong today, a symmetric encryption key must be at least ________ bits long.

3DES is ________.

Companies transmit over the Internet because the Internet ________.

The sender the uses public key of the recipient in ________.

Replay attacks can be thwarted by using ________.

An attacker who captures the keying information in Diffie-Hellman key agreement can compute the symmetric session key.

________ ciphers leave letters in their original positions.

SSL/TLS was developed for remote access VPNs.

Which of the following measures do HMACs use?

To meet national export limitation in many countries, RC4 often uses a key length of ________ bits.

MS-CHAP provides mutual authentication.

The Threat Environment

Planning and Policy

Secure Networks

Access Control

Firewalls

Host Hardening

Application Security

Data Protection

Incident and Disaster Response

Module A: Networking Concepts

Filters