Question 21

The Internet is formed by interconnecting multiple packet switching networks. Interconnecting is substantially more powerful than a single networking technology because the approach permits new technologies to be incorporated at any time without requiring the replacement of old technologies.

True

False

I don't know

Question 22

The chief advantage of packet switching over circuit switching is;

lower cost

longer distance

wider area

faster service

Question 23

The fundamental abstraction used to relate cooperative sets called suites or families into a unified whole is known as a layering model. The layering model used with TCP/IP, and usually referred to as a stack consists of how many layers?

3

4

5

6

7

8

Question 24

The physical layer (layer 1) specifies details about the underlying transmission medium and the associated hardware. All specifications related to electrical properties, radio frequencies, and signals belong in layer 1.

True

False

Question 25

The simplest LAN extension mechanism consists of an optical fiber and a pair of fiber modems used to connect the computer to a remote Ethernet.

True

False

Question 26

The simplest form of wiring that helps reduce interference from electrical noise is known as;

straight copper wire

plastic coated, insulating straight wire

unshielded twisted pair (UTP)

coaxial cable

Question 27

The term "header" in Internet communications refers to;

an outstanding play performed solely by use of the head

the message, or content of the packet

additional information added by a protocol

the first line of an RSS feed

Question 28

The term communication protocol, network protocol, or protocol refers to;

A research experience on ARPANET

Diplomatic terminology only

The details for one aspect of computer communication, including actions to be taken when errors or unexpected situations arise

Multiple entities, such as committees within IEEE, that must agree on details ranging from the electrical voltage used to the format and meaning of messages, to ensure that entities can interoperate correctly

Question 29

The terms "guided" and "unguided" distinguish between;

physical media and radio transmissions

copper wiring and transmissions in free space

optical fibers and radio transmissions

all of the above

none of the above

Question 30

The typical LAN is designed to span;

the metropolitan area

global distances

1 - 3 miles

only a few hundred meters

Question 31

To master the complexity in networking, it is important to gain a broad background that includes five key aspects of networking. These five key aspects are;

Network applications, data communications, packet switching, internetworking with TCP/IP, additional networking concepts and technologies.

Network applications, federal regulations, hardware and software systems, network programming, and software development.

Federal regulations, high-speed Internet access, big data storage, wireless technologies and token ring technologies.

LAN, WAN, MAN, TCP/IP, software development and Internet programming.