Chapter 2

Question 1

The Application layer provides a set of interfaces for applications to access networked services, such as networked file transfer, message handling, and database query processing.
True or False?

Answer 1

True

Question 2

The PDU at the Application layer (and the Presentation and Session layers) is referred to simply as “message.”
True or False?

Answer 2

False

Question 3

Encoding is the representation of 0s and 1s as a physical signal, such as electrical voltage or a light pulse.
True or False?

Answer 3

True

Question 4

A packet is the basic unit for network traffic as it travels across the medium.
True or False?

Answer 4

False

Question 5

In the OSI reference model, the ____ layer is layer 6.

Answer 5

Presentation

Question 6

In the OSI reference model, the ____ layer is layer 7.

Answer 6

Application

Question 7

In the OSI reference model, the ____ layer is layer 5.

Answer 7

Session

Question 8

In the OSI reference model, the ____ layer is layer 1.

Answer 8

Physical

Question 9

In the OSI reference model, the ____ layer is layer 2.

Answer 9

Data Link

Question 10

In the OSI reference model, the ____ layer is layer 3.

Answer 10

Network

Question 11

In the OSI reference model, the ____ layer is layer 4.

Answer 11

Transport

Question 12

Access control is handled at the ____ layer during the routing process; the router consults a list of rules before forwarding an incoming packet to determine whether a packet meeting certain criteria (such as source and destination address) should be permitted to reach the intended destination.

Answer 12

Network

Question 13

The PDU at the Data Link layer is called a ____.

Answer 13

Frame

Question 14

The PDU at the Network layer is called a ____.

Answer 14

Packet

Question 15

The PDU at the Transport layer is called a ____.

Answer 15

Segment

Question 16

The job of the ____ to convert bits into signals for outgoing messages and signals into bits for incoming messages.

Answer 16

Physical Layer

Question 17

A frame is usually addressed to only one computer and is called a ____ frame.

Answer 17

Unicast

Question 18

What is the role of the LLC sublayer?

Answer 18

Send out connection initiation, controls data-link communication

Question 19

What is the role of the MAC sublayer?

Answer 19

Job is to make sure communication goes to the right computer by using MAC address

Question 20

On the Internet and most LANs, connectionless protocols are used for the majority of data transfers.
True or False?

Answer 20

False

Question 21

FDDI is different than Token Ring in that it has two rings.

True or False?

Answer 21

True