Module 2: Quiz

Question 1

The transport layer protocols offer a logical connection between processes only if the hosts reside in the same network.

True/False

Answer 1

False

Question 2

A sending host receives a message from the application layer and encapsulates it with the transport layer header before passing it down to the network layer.

True/False

Answer 2

True

Question 3

An application running on a host can bind to multiple sockets simultaneously.

True/False

Answer 3

True

Question 4

The identifier of a UDP socket is a tuple of destination IP address and port.

True/False

Answer 4

True

Question 5

The identifier of a TCP socket is a tuple of source IP address and port.

True/False

Answer 5

False

Question 6

UDP is considered more lightweight than TCP.

True/False

Answer 6

True

Question 7

One of the functionalities that UDP offers is to increase or decrease the pace with which the sender sends data to the receiver.

True/False

Answer 7

False

Question 8

UDP offers basic error checking.

True/False

Answer 8

True

Question 9

Assume Hosts A, B, and C. Host A has a UDP socket with port 123. Hosts B and C each send their own UDP segment to Host A. Hosts B and C cannot use the same destination port 123 for sending their UDP segment.

True/False

Answer 9

False

Question 10

TCP offers in-order delivery of the packets, flow control, and congestion control.

True/False

Answer 10

True

Question 11

TCP detects packet loss using timeouts and triple duplicate acknowledgements.

True/False

Answer 11

True

Question 12

Flow control is a rate control mechanism to protect the receiver’s buffer from overflowing.

True/False

Answer 12

True

Question 13

Congestion control is a rate control mechanism to protect the network from congestion.

True/False

Answer 13

True

Question 14

In TCP, the number of unacknowledged segments that a sender can have is the minimum of the congestion window and the receive window.

True/False

Answer 14

True

Question 15

Consider the TCP Reno, congestion window is cut in half in both of the following events: a) a timeout occurs, b) a triple duplicate acknowledgement occurs.

True/False

Answer 15

False

Question 16

Consider a TCP connection and a diagram showing the congestion as it progresses. From the diagram, when we observe the congestion window drop to its initial value, we infer that a packet loss occurred.

True/False

Answer 16

True

Question 17

Consider a TCP connection, and a diagram that shows how the congestion window progresses over time. From the diagram we can identify the time periods of slow start when the congestion window increases by 1 every RTT.

True/False

Answer 17

False

Question 18

TCP Cubic was designed for better network utilization.

True/False

Answer 18

True

Question 19

TCP Cubic congestion window growth function is designed to not overflow the receiver’s buffer.

True/False

Answer 19

False

Question 20

TCP Cubic uses a cubic function to increase the congestion window.

True/False

Answer 20

True

Question 21

TCP Cubic increases the congestion window in every RTT.

True/False

Answer 21

False