Question 1

Which of the following is true?

Accepted Answer

A)  TCP works at the transport layer. 
B)  UDP works at the transport layer. 
C)  Both A and B 
D)  Neither A nor B

Question 2

Spread spectrum transmission in wireless LANs provides security.

Accepted Answer

A) True 
 B)False

Question 3

Servers get ________.

Accepted Answer

A)  static IP addresses 
B)  ephemeral IP addresses 
C)  dynamic IP addresses 
D)  None of the above.

Question 4

A one-bit field is called a ________ field.

Accepted Answer

A)  binary 
B)  singlet 
C)  TCP 
D)  flag

Question 5

________ tell the attacker that a certain IP address has a live host or router.

Accepted Answer

A)  ICMP Echo replies 
B)  ICMP error messages 
C)  Both A and B 
D)  Neither A nor B

Question 6

TCP segment carries octets 4321 through 4371. What is its sequence number?

Accepted Answer

A)  4321 
B)  4371 
C)  4372 
D)  None of the above.

Question 7

What is the general function of the second row in the IPv4 header?

Accepted Answer

A)  To give the source address 
B)  To give the destination address 
C)  To handle fragmentation and reassembly 
D)  None of the above.

Question 8

In e-mail, the security standards situation is mature.

Accepted Answer

A) True 
 B)False

Question 9

In a TCP half-open DoS attack, ________.

Accepted Answer

A)  the attacker sends the final ACK of a session opening 
B)  the attacker sends an RST segment 
C)  Both A and B 
D)  Neither A nor B

Question 10

The ________ standard is designed to prevent impostors from sending false supervisory messages to switches.

Accepted Answer

A)  802.1X 
B)  802.1AE 
C)  Both A and B 
D)  Neither A nor B

Question 11

Which of the following sends passwords in the clear?

Accepted Answer

A)  FTP 
B)  SSH 
C)  Both A and B 
D)  Neither A nor B

Question 12

Packets are carried inside frames.

Accepted Answer

A) True 
 B)False

Question 13

Spread spectrum transmission is used in wireless LANs ________.

Accepted Answer

A)  to increase transmission speed 
B)  for security 
C)  Both A and B 
D)  Neither A nor B

Question 14

The ________ field in a packet ensures that misaddressed packets will not circulate endlessly.

Accepted Answer

A)  header checksum 
B)  TTL 
C)  Both A and B 
D)  Neither A nor B

Question 15

Intercepting wireless LAN transmissions is difficult.

Accepted Answer

A) True 
 B)False

Question 16

A flag field has the value 1.

Accepted Answer

A)  The TCP segment is an acknowledgement. 
B)  The field is set. 
C)  The field is locked. 
D)  The router will reduce the value to 0 and drop the packet.

Question 17

Which organization creates Internet standards?

Accepted Answer

A)  DARPA 
B)  IETF 
C)  ISO 
D)  TCP

Question 18

The IP header checksum field is used for error detection.

Accepted Answer

A) True 
 B)False

Question 19

User computers connect to ________ switches.

Accepted Answer

A)  core 
B)  primary 
C)  workgroup 
D)  terminal

Question 20

Which of the following is an OSI standards agency?

Accepted Answer

A)  ISO 
B)  ITU-T 
C)  Both A and B 
D)  Neither A nor B

Exam 11: Module A: Networking Concepts

Which of the following is true?

Spread spectrum transmission in wireless LANs provides security.

Servers get ________.

A one-bit field is called a ________ field.

________ tell the attacker that a certain IP address has a live host or router.

TCP segment carries octets 4321 through 4371. What is its sequence number?

What is the general function of the second row in the IPv4 header?

In e-mail, the security standards situation is mature.

In a TCP half-open DoS attack, ________.

The ________ standard is designed to prevent impostors from sending false supervisory messages to switches.

Which of the following sends passwords in the clear?

Packets are carried inside frames.

Spread spectrum transmission is used in wireless LANs ________.

The ________ field in a packet ensures that misaddressed packets will not circulate endlessly.

Intercepting wireless LAN transmissions is difficult.

A flag field has the value 1.

Which organization creates Internet standards?

The IP header checksum field is used for error detection.

User computers connect to ________ switches.

Which of the following is an OSI standards agency?