Deck 5: Transport Layer

Question 1

The ability of TCP to serve multiple applications simultaneously is called _____.

A)reliability
B)flow control
C)multiplexing
D)segmentation
E)connection establishment

Answer 1

C

Question 2

An example of a standard port in TCP is _____.

A)a web browser using port 7756
B)an FTP client using port 34567
C)a web server listening on port 80
D)a network application written by you in Java,listening on port 8000

Answer 2

C

Question 3

The advantages of segmentation in TCP include _____.

A)reduction in the likelihood of errors in each datagram
B)reduction in the amount of rework if a datagram is lost
C)simplification of router hardware
D)All of the above

Answer 3

D

Question 4

Breaking application data of arbitrary size into smaller fragments for delivery by IP is called _____.

A)reliability
B)flow control
C)multiplexing
D)segmentation
E)connection establishment

Question 5

The transport layer protocol that does not provide end-to-end reliability over packet switched networks is _____.

A)IP
B)UDP
C)TCP
D)HTTP

Question 6

In the sliding windows mechanism for flow control,the ____ before waiting for an acknowledgment.

A)receiver processes as much data as specified by the sender in the window size field
B)sender sends as much data as specified by the receiver in the window size field
C)sender transmits data one segment at a time
D)receiver acknowledge data one segment at a time

Question 7

Optimizing the transmission rate in TCP to minimize lost packets is called _____.

A)reliability
B)flow control
C)multiplexing
D)segmentation
E)connection establishment

Question 8

A TCP segment with sequence number 1,000 has a length of 350 Bytes.The next segment in the sequence will have a sequence number of _____.

A)1000
B)1001
C)1350
D)1351

Question 9

The mechanism used for flow control in TCP is _____.

A)sliding window
B)three-way handshake
C)stop-and-wait
D)CSMA/ CD

Question 10

When a TCP connection is initiated,the sequence number of the first datagram is _____.

A)1
B)a randomly chosen number
C)Either A or B
D)None of the above

Question 11

The sequence numbers added by TCP to every datagram enable the detection of _____.

A)duplicate segments
B)lost segments
C)bit level errors
D)A and B
E)A and C

Question 12

Multiplexing at the transport layer enables _____.

A)multiple applications on the host to share a common network connection
B)multiple hosts to share a common physical medium
C)Both of the above
D)None of the above

Question 13

Flow control in TCP is used to _____.

A)speed up the receiver if necessary
B)speed up the sender if necessary
C)slow down the receiver if necessary
D)slow down the sender if necessary

Question 14

The window size field in TCP specifies the _____.

A)amount of data the receiver is capable of processing
B)amount of data the sender is capable of processing
C)size of the window in the data center where the sender is located
D)sequence number of the last received datagram

Question 15

Standard ports are defined in TCP for _____.

A)web browsers
B)common network server applications
C)common network client applications
D)common desktop applications

Question 16

The important functions of the transport layer include all of the following except _____.

A)segmentation
B)routing
C)port addressing
D)duplicate detection

Question 17

The transport layer protocol that provides end-to-end reliability over packet switched networks is _____.

A)IP
B)UDP
C)TCP
D)HTTP

Question 18

The three-way handshake is used in _____.

A)reliability
B)flow control
C)multiplexing
D)segmentation
E)connection establishment

Question 19

Ensuring that TCP recovers from lost and duplicate packets is called _____.

A)reliability
B)flow control
C)multiplexing
D)segmentation
E)connection establishment

Question 20

TCP assigns a sequence number to every byte of data to _____.

A)enable better detection of bit-level errors
B)enable the receiver to acknowledge partial datagrams
C)simplify counting of segments
D)None of the above

Question 21

UDP is used when _____.

A)large quantities of data are to be transferred
B)small quantities of data are to be transferred
C)ordered and reliable delivery is not necessary for an application
D)ordered and reliable delivery is required for an application

Question 22

The standard ports in TCP are port numbers in the range _____.

A)1 - 1,023
B)1 - 100
C)1 - 65,535
D)1 - 10,000

Question 23

A communication socket or Internet socket is defined by an)_____.

A)IP address
B)port address
C)IP address and port address together
D)None of the above

Question 24

The advantages of UDP include _____.

A)it can be faster than TCP
B)it is simpler than TCP
C)it is suitable for multi-media applications
D)it is as reliable as TCP

Question 25

Incoming packets are directed to the appropriate application on the computer based on the _____.

A)MAC address
B)IP address
C)port address
D)URL