The correct answer for each question is indicated by

Chapter 1:
The correct answer for each question is indicated by a .
1
CORRECT
The _______ is the physical path over which a message travels.
2
INCORRECT
The information to be communicated in a data communications system is the _______.
3
CORRECT
Frequency of failure and network recovery time after a failure are measures of the _______ of a
network.
4
INCORRECT
An unauthorized user is a network _______ issue.
1
5
INCORRECT
Which topology requires a central controller or hub?
6
CORRECT
Which topology requires a multipoint connection?
7
CORRECT
Communication between a computer and a keyboard involves ______________ transmission.
2
8
INCORRECT
A television broadcast is an example of _______ transmission.
9
INCORRECT

A _______ connection provides a dedicated link between two devices.
1
0
INCORRECT
In a _______ connection, more than two devices can share a single link.
3
1
1
CORRECT
In _______ transmission, the channel capacity is shared by both communicating devices at all
times.
1
2
INCORRECT
In the original ARPANET, _______ were directly connected together.
1
3
CORRECT
This was the first network.
1
CORRECT Which organization has authority over interstate and international commerce in the
communications field?
4
4
1
5
INCORRECT
_______ are special-interest groups that quickly test, evaluate, and standardize new technologies.
1
6

CORRECT
Which agency developed standards for physical connection interfaces and electronic signaling
specifications?
1
7
INCORRECT
_______ is the protocol suite for the current Internet.
5
1
8
INCORRECT
_______ refers to the structure or format of the data, meaning the order in which they are
presented.
1
9
INCOR RECT
________ defines how a particular pattern to be interpreted, and what action is to be taken based
on that interpretation.
20
CORRECT
_______ refers to two characteristics: when data should be sent and how fast it can be sent.
6
2
1
CORRECT
Data flow between two devices can occur in a _______ way.
22
INCORRECT
In a ______ connection, two and only two devices are connected by a dedicated link.
2

3
INCORRECT
In a ________ connection, three or more devices share a link.
7
2
4
INCORRECT
______ refers to the physical or logical arrangement of a network.
25
CORRECT
Devices may be arranged in a _____ topology.
26
INCORRECT
A _______ is a data communication system within a building, plant, or campus, or between nearby
buildings.
27
INCORRECT
A ______ is a data communication system spanning states, countries, or the whole world.
8
2
8
INCORRECT
________ is a collection of many separate networks.
29
CORRECT
There are ______________ Internet service providers.
3
0
INCORRECT
A ________ is a set of rules that governs data communication.

9
3
1
INCORRECT
________ is an idea or concept that is a precursor to an Internet standard.
CHAPTER 2:
The correct answer for each question is indicated by a .
1
INCORRECT
The Internet model consists of _______ layers.
2
INCORRECT
The process-to-process delivery of the entire message is the responsibility of the _______ layer.
10
3
INCORRECT
The _______ layer is the layer closest to the transmission medium.
4
CORRECT
Mail services are available to network users through the _______ layer.
5
INCORRECT
As the data packet moves from the upper to the lower layers, headers are _______.
11
6
INCORRECT
The _______ layer lies between the network layer and the application layer.
7
INCORRECT
Layer 2 lies between the physical layer and the _______ layer.

8
INCORRECT
When data are transmitted from device A to device B, the header from A's layer 4 is read by B's
_______ layer.
9
INCORRECT
The _______ layer changes bits into electromagnetic signals.
12
1
0
CORRECT
Which of the following is an application layer service?
1
1
INCORRECT
Why was the OSI model developed?
A)
B) The rate of data transfer was increasing exponentially
C) Standards were needed to allow any two systems to communicate
1
2
INCORRECT
The _______ model shows how the network functions of a computer ought to be organized.
13
1
3
CORRECT
The physical layer is concerned with the movement of _______ over the physical medium.
1
4

INCORRECT
The OSI model consists of _______ layers.
1
5
INCORRECT
In the OSI model, as a data packet moves from the lower to the upper layers, headers are
_______.
14
1
6
INCORRECT
In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5
is read by B's _______ layer.
1
7
INCORRECT
In the OSI model, what is the main function of the transport layer?
B)
D)
1
8
INCORRECT
In the OSI model, encryption and decryption are functions of the ________ layer.
1
INCORRECT When a host on network A sends a message to a host on network B, which address does the router
look at?
15
9
20
INCORRECT

To deliver a message to the correct application program running on a host, the _______ address
must be consulted.
2
1
INCORRECT
IPv6 has _______ -bit addresses.
22
CORRECT
ICMPv6 includes _______.
16
2
3
INCORRECT
The ______ layer is responsible for moving frames from one hop (node) to the next.
2
4
INCORRECT
The ______ layer adds a header to the packet coming from the upper layer that includes the
logical addresses of the sender and receiver.
25
INCORRECT
The_________ layer is responsible for the delivery of a message from one process to another.
17
26
CORRECT
The Internetworking Protocol (IP) is a ________ protocol.
27
INCORRECT
_______ is a process-to-process protocol that adds only port addresses, checksum error control,
and length information to the data from the upper layer.

2
8
INCORRECT
__________ provides full transport layer services to applications.
18
29
INCORRECT
The ________ address, also known as the link address, is the address of a node as defined by its
LAN or WAN.
3
0
INCORRECT
Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC).
3
1
INCORRECT
A port address in TCP/IP is ______ bits long.
3
2
INCORRECT
The ____ created a model called the Open Systems Interconnection, which allows diverse systems
to communicate.
19
3
3
INCORRECT
The seven-layer _____ model provides guidelines for the development of universally compatible
networking protocols.
3
4

INCORRECT
The physical, data link, and network layers are the ______ support layers.
3
5
INCORRECT
The session, presentation, and application layers are the ____ support layers.
20
3
6
INCORRECT
The _______ layer links the network support layers and the user support layers.
3
7
CORRECT
The _______ layer coordinates the functions required to transmit a bit stream over a physical
medium.
3
8
INCORRECT
The _______ layer is responsible for delivering data units from one station to the next without
errors.
21
3
9
INCORRECT
The ______ layer is responsible for the source-to-destination delivery of a packet across multiple
network links.
4
0
INCORRECT

The ________ layer is responsible for the process-to-process delivery of the entire message.
4
1
INCORRECT
The ______ layer establishes, maintains, and synchronizes the interactions between
communicating devices.
22
4
2
CORRECT
The _______ layer ensures interoperability between communicating devices through
transformation of data into a mutually agreed upon format.
4
3
INCORRECT
The _________ layer enables the users to access the network.
4
4
INCORRECT
TCP/IP is a ______ hierarchical protocol suite developed ____ the OSI model.
23
4
5
INCORRECT
The TCP/IP _______ layer is equivalent to the combined session, presentation, and application
layers of the OSI model.
4
6
INCORRECT
The ________ address, also known as the link address, is the address of a node as defined by its

LAN or WAN.
4
7
INCORRECT
The ____ address uniquely defines a host on the Internet.
4
8
INCORRECT
The_____ address identifies a process on a host.
24
CHAPTER 3:
The correct answer for each question is indicated by a .
1
INCORRECT
Before data can be transmitted, they must be transformed to ________.
A
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25