Chapter 10

Question 1

Any encryption that uses the same key for encryption and decryption is called?
A) Encoded Key
B) Symmetric Key
C) Single Key
D) Synthetic Key

Answer 1

B) Symmetric Key encrpytion uses the same key.

Question 2

RC4 is a(n)\_\_\_\_ cipher
A) Block
B) Forwarding
C) Stream
D) Asymmetric

Answer 2

C) RC4 is an Stream Cipher.

Question 3

In a PKI encryption method, which key encrypts the data?
A) Public
B) private
C) Both
D) Depends on who sends the data.

Answer 3

A) You send someone a public key that he or she in turn, uses to encrypt the data. The private key can decrypt data encrypted with the public key.

Question 4

The process of verifying with a high degree of confidence that the sender is who the receiver thinks he or she should be called \_\_\_\_\_\_?
A) PKI
B) Authentication
C) Locking
D) non-repudiation

Answer 4

D) this is the definition of non-repudiation

Question 5

A hash function is by definition a \_\_\_\_\_\_\_\_?
A) Complex Function
B) PKI function
C) One-Way Function
D) systematic Function

Answer 5

C) Hash functions must be one-way. They should be complex but complexity is not a requirement.

Question 6

Which of the following is a common hash function?
A) SHA-3
B) RC4
C) AES
D) BMX

Answer 6

A) Of the choices listed, Only SHA-3 is a hash function.

Question 7

In order to have PKI you must have a(n)\_\_\_\_\_?
A) web server
B) Web of Trust
C) Root Authority
D) Unsigned Certificate

Answer 7

C) A PKI must have a root authority.

Question 8

Which type of access control requires a label to define its sensitivity?
A) MAC
B) DAC
C) RBAC
D) VAC

Answer 8

A) (MAC) Mandatory Access Control must use a label to define sensitivity.

Question 9

If you saw some traffic running on UDP ports 1812 and 1813, what AAA standard would you know was running?
A) PPP
B) RADIUS
C) MS-CHAP
D) TACACS+

Answer 9

B) RADIUS uses UDP ports 1812 and 1813.

Question 10

Which authentication standard is highly time sensitive?
A) PAP
B) RADIUS
C) 802.1X
D) Kerberos

Answer 10

D) All Kerberos tickets are timestamped.

Question 11

A(n) \_\_\_\_ defines a user's access to a resource based on the roles the user plays in the network environment?
A) MAC
B) DAC
C) RBAC
D) VAC

Answer 11

C) A RBAC defines a user’s access to a resource based on the roles the user plays in the network environment.

Question 12

A(n)\_\_\_\_\_ is based on the idea that a reasource has an owner who may at his or her discretion assign access to that resource.
A) MAC
B) DAC
C) RBAC
D) VAC

Answer 12

B) A DAC is based on the idea that a reasource has an owner who may at his or her discretion assign access to that resource.

Question 13

Which authentication offers more security?
A) PAP
B) CHAP
C) MS-CHAP
D) PPP

Answer 13

C) MS-CHAMP offers the most secruity.

Question 14

What port do Kerberos use by default?
A) 80
B) 88
C) 90
D) 98

Answer 14

B) 88. Kerberos uses UDP or TCP port 88 by default.

Question 15

What port does SFTP use?
A) 23
B) 20
C) 21
D) 22

Answer 15

A) 23. SFTP uses TCP port 23.

Question 16

SNMP runs on UDP ports \_\_\_ and \_\_\_?
A) 80 - 88
B) 120 - 121
C) 161 - 162
D) 190 - 192

Answer 16

C) 161 - 162. SNMP runs on UDP ports 161 and 162?

Question 17

NTP uses UDP port \_\_\_?
A) 123
B) 163
C) 193
D) 83

Answer 17

A) 123 - NTP uses UDP port 123.