Chapter 1 - LAN/WAN Networking: An Overview

TRUE/FALSE

	1.	The "W" in WAN stands for wide.

ANS:	T	PTS:	1	REF:	2

	2.	Often a LAN ends when there is a change in the communications medium.

ANS:	T	PTS:	1	REF:	6

	3.	A single LAN may use only one protocol.

ANS:	F	PTS:	1	REF:	7

	4.	LANs and WANs have roots in early telegraph and telephone systems.

ANS:	T	PTS:	1	REF:	27

	5.	The Soviets launched the first communications satellite, called Echo.

ANS:	F	PTS:	1	REF:	12

	6.	LSI and VLSI chips paved the way for faster and cheaper digital devices, such as computers and computer terminals.

ANS:	T	PTS:	1	REF:	15

	7.	In 1983 the separation of ARPANET and Milnet marked the arrival of the Internet.

ANS:	T	PTS:	1	REF:	16

	8.	Bridges can be used to segment LANs into smaller subnetworks to improve performance by isolating network traffic, isolating network problems, and controlling access to each network.

ANS:	T	PTS:	1	REF:	22

	9.	Gateways are always stand-alone devices.

ANS:	F	PTS:	1	REF:	24

MODIFIED TRUE/FALSE

	1.	The "M" in MAN stands for multiple. _________________________

ANS:	F, metropolitan

PTS:	1	REF:	2

	2.	The simplest WAN is a dial-up modem connected to a network provider's services over basic telephone lines. _________________________

ANS:	T			PTS:	1	REF:	5

	3.	Frames typically operate at the Network layer of the OSI model. _________________________

ANS:	F, Data Link

PTS:	1	REF:	7

	4.	A(n) frame does not include routing information. _________________________

ANS:	T			PTS:	1	REF:	7

	5.	After the Soviet's launched the Sputnik satellite into space, ARPA was formed to help reestablish the United States as a leader in science. _________________________

ANS:	T			PTS:	1	REF:	11

	6.	EBCDIC consists of 96 uppercase and lowercase characters and numbers, plus 32 nonprinting characters. _________________________

ANS:	F, ASCII

PTS:	1	REF:	12

	7.	TCP stands for Transmitted Configuration Protocol. _________________________

ANS:	F, Transmission Control Protocol

PTS:	1	REF:	15

	8.	Routers are network transmission devices that connect different LANs or LAN segments using the same access methods. _________________________

ANS:	F, Bridges

PTS:	1	REF:	22

	9.	Encoding involves converting a frame or packet from one format to another, as in formatting all frames or packets to the same size requirements regardless of the protocol. _________________________

ANS:	F, Translation

PTS:	1	REF:	25

MULTIPLE CHOICE

	1.	Most of the first computer networks transmitted data over ____.
a.	microwaves	c.	copper wire	
b.	radio waves	d.	fiber-optic media	

ANS:	C	PTS:	1	REF:	2

	2.	Which type of technology has advanced the fastest?
a.	computer network communications	c.	television	
b.	radio	d.	telephone	

ANS:	A	PTS:	1	REF:	2

	3.	A ____ is typically the least complex type of network.
a.	LAN	c.	MAN	
b.	NAN	d.	WAN	

ANS:	A	PTS:	1	REF:	3

	4.	A ____ is typically the most complex type of network.
a.	LAN	c.	MAN	
b.	NAN	d.	WAN	

ANS:	D	PTS:	1	REF:	3

	5.	A ____ is typically medium in complexity.
a.	LAN	c.	MAN	
b.	NAN	d.	WAN	

ANS:	C	PTS:	1	REF:	3

	6.	A WAN typically uses ____ communications.
a.	microwave	c.	fiber-optic	
b.	radio	d.	Both A and B.	

ANS:	D	PTS:	1	REF:	3

	7.	A MAN typically uses ____ communications.
a.	microwave	c.	fiber-optic	
b.	radio	d.	Both A and B.	

ANS:	C	PTS:	1	REF:	3

	8.	A number of connected LANs in a city form a ____.
a.	MAN	c.	city-wide LAN	
b.	super LAN	d.	WAN	

ANS:	A	PTS:	1	REF:	4

	9.	The Internet is an example of a ____.
a.	LAN	c.	MAN	
b.	NAN	d.	WAN	

ANS:	D	PTS:	1	REF:	5

	10.	The network protocol does not specify ____.
a.	how networked data is formatted into discrete units	
b.	how data is transmitted	
c.	how data is interpreted at the receiving end	
d.	None of the above.	

ANS:	D	PTS:	1	REF:	7

	11.	When getting specific, a frame represents information used in conjunction with ____ of the OSI model.
a.	Layer 1	c.	Layer 3	
b.	Layer 2	d.	Layer 4	

ANS:	B	PTS:	1	REF:	7

	12.	When getting specific, a packet represents information used in conjunction with ____ of the OSI model.
a.	Layer 1	c.	Layer 3	
b.	Layer 2	d.	Layer 4	

ANS:	C	PTS:	1	REF:	7

	13.	OSI stands for ____.
a.	Operating Systems Integration	c.	Overall Systems Internetworking	
b.	Open Systems Interconnection	d.	Open Switch Interchange	

ANS:	B	PTS:	1	REF:	7

	14.	A(n) ____ network is one owned and maintained by an organization.
a.	public	c.	private	
b.	freely accessible	d.	centralized	

ANS:	C	PTS:	1	REF:	8

	15.	An example of a ____ network is network services offered by a telecommunications company or a cable TV company.
a.	public	c.	private	
b.	freely accessible	d.	centralized	

ANS:	A	PTS:	1	REF:	8

	16.	The ____ manages RFCs.
a.	IEEE	c.	IETF	
b.	FCC	d.	ARPA	

ANS:	C	PTS:	1	REF:	9

	17.	The "R" in RFC stands for ____.
a.	Router	c.	Recommendation	
b.	Request	d.	Research	

ANS:	B	PTS:	1	REF:	9

	18.	PCM sets the stage for ____.
a.	T-carriers	c.	PCs	
b.	modems	d.	ICs	

ANS:	A	PTS:	1	REF:	11

	19.	The first electronic digital computer brought to life was the ____ computer.
a.	Atanasoff-Berry 	c.	ENIAC	
b.	Memex 	d.	Mauchly	

ANS:	C	PTS:	1	REF:	11

	20.	____ developed the first laser.
a.	IBM	c.	MIT	
b.	ARPA	d.	Bell Labs	

ANS:	D	PTS:	1	REF:	11

	21.	____ demonstrated the first integrated circuit.
a.	Texas Instruments	c.	MIT	
b.	ARPA	d.	Bell Labs	

ANS:	A	PTS:	1	REF:	11

	22.	The "E" in EBCDIC stands for ____.
a.	Extra	c.	Ethernet	
b.	Extensive	d.	Extended	

ANS:	D	PTS:	1	REF:	12

	23.	____ created the first mass-produced minicomputer.
a.	Digital Equipment Corporation	c.	IBM	
b.	Texas Instruments	d.	Bell Labs	

ANS:	A	PTS:	1	REF:	12

	24.	____ developed the UNIX operating system.
a.	NRL	c.	MIT	
b.	Sun Microsystems	d.	Bell Labs	

ANS:	D	PTS:	1	REF:	13

	25.	The first digital telephone switch was made available by ____.
a.	Bell Labs	c.	Northern Telecom	
b.	MCI 	d.	Aspect	

ANS:	C	PTS:	1	REF:	15

	26.	Plans for IP were launched in the ____.
a.	1950s	c.	1970s	
b.	1960s	d.	1980s	

ANS:	C	PTS:	1	REF:	15

	27.	The "S" in SNMP stands for ____.
a.	Simple	c.	Signal	
b.	Service	d.	System	

ANS:	A	PTS:	1	REF:	17

	28.	In 1990 ____ was gaining in use as the digital switch protocol for public telephone networks.
a.	X.25	c.	IP	
b.	SS7	d.	None of the above.	

ANS:	B	PTS:	1	REF:	17

	29.	Mosaic Communications Corporation is the predecessor of ____.
a.	Netscape Communications	c.	Adobe Corporation	
b.	Sun Microsystems	d.	3Com Corporation	

ANS:	A	PTS:	1	REF:	18

	30.	SNA stands for ____.
a.	Simple Networking Association	c.	Systems Network Architecture	
b.	Standard of Networking Associates	d.	System of New Architecture	

ANS:	C	PTS:	1	REF:	20

	31.	Which is not true about .NET?
a.	It incorporates the Internet and focuses on integrating data and user functions.	
b.	It integrates different programming languages so they can be used to build one large-scale application.	
c.	It furthers the distinctions between desktop and server computers.	
d.	None of the above.	

ANS:	C	PTS:	1	REF:	21

	32.	____ regularly communicate and dynamically change information about network paths as the network composition or network conditions change.
a.	Bridges	c.	Gateways	
b.	Routers	d.	Repeaters	

ANS:	B	PTS:	1	REF:	23

	33.	____ can determine the shortest path between two computers separated by LANs or by WANs.
a.	Bridges	c.	Gateways	
b.	Routers	d.	Repeaters	

ANS:	B	PTS:	1	REF:	23

	34.	A ____ can be configured to function as a router.
a.	NetWare server	c.	UNIX computer	
b.	.NET server	d.	All of the above.	

ANS:	D	PTS:	1	REF:	23

	35.	____ are employed least frequently.
a.	Bridges	c.	Gateways	
b.	Routers	d.	None of the above.	

ANS:	C	PTS:	1	REF:	24

	36.	A(n) ____ bridge is a bridge between networks that use different transport protocols and that has the ability to propagate the different protocols to the right networks.
a.	routing	c.	internetworking	
b.	intelligent	d.	translational	

ANS:	D	PTS:	1	REF:	25

YES/NO

	1.	Of all the network types, a MAN typically spans the shortest distance.

ANS:	N	PTS:	1	REF:	3

	2.	A large WAN may have many constituent LANs and MANs on different continents.

ANS:	Y	PTS:	1	REF:	4

	3.	In a network the logical path of the data must match the physical layout.

ANS:	N	PTS:	1	REF:	7

	4.	TAT1 was the first successful transatlantic cable.

ANS:	Y	PTS:	1	REF:	11

	5.	The development of ALOHAnet set the stage for Ethernet.

ANS:	Y	PTS:	1	REF:	14

	6.	IBM's Personal Computer (PC) hit the market in the 1970s.

ANS:	N	PTS:	1	REF:	16

	7.	Internetworking is the process of joining identical types of networks for mutual communications.

ANS:	N	PTS:	1	REF:	28

	8.	Microsoft developed the .NET architecture.

ANS:	Y	PTS:	1	REF:	21

	9.	A bridge cannot connect LANs of one media type to LANs that use a different media type.

ANS:	N	PTS:	1	REF:	22

COMPLETION

	1.	A(n) ____________________ is a system of computers, print devices, network devices, and computer software linked by communications cabling or radio waves.

ANS:	computer network

PTS:	1	REF:	2

	2.	The figure above illustrates resources in a(n) ____________________.

ANS:	enterprise network

PTS:	1	REF:	6

	3.	A(n) ____________________ is a unit of data that is formatted for transmission as a signal over a network.

ANS:	packet

PTS:	1	REF:	7

	4.	The design layout of a network is called the network ____________________.

ANS:	topology

PTS:	1	REF:	7

	5.	A(n) ____________________ is a computer (mainframe, minicomputer, server, or workstation) that has an operating system enabling multiple computers to access it at the same time for files, data, and services.

ANS:	host

PTS:	1	REF:	28

	6.	IP stands for ______________________________.

ANS:	Internet Protocol

PTS:	1	REF:	15

	7.	The first hypermedia authoring system was marketed by ____________________ in 1987.

ANS:	Apple Computer

PTS:	1	REF:	16

	8.	The Internet uses the ____________________ protocol to enable people to share e-mail messages and computer files to access a vast array of information.

ANS:	TCP/IP

PTS:	1	REF:	28

	9.	____________________ is used to transmit a frame or packet from one Microsoft- or Novell-based LAN over the Internet to another LAN of the same type.

ANS:	Encapsulation

PTS:	1	REF:	25

	10.	____________________ is a technology used in some high-speed LANs and WANs in which packets from one type of network are formatted to look similar to the data transport unit of another network.

ANS:	
LANE
LAN emulation

PTS:	1	REF:	26

MATCHING

Match each correct item with the statement below.
a.	LAN	f.	SNA	
b.	WAN	g.	Ethernet	
c.	MAN	h.	fiber optics	
d.	enterprise	i.	ARPANET	
e.	VPN	

	1.	The key characteristic in this is the existence of different resources that enable users to fulfill business, research, and educational tasks.

	2.	A private network that functions like a tunnel through a larger network that is restricted to designated member clients only.

	3.	An example of this is a university chemistry department in which the computers in each office and lab are connected by communications cable.

	4.	A network transport method that uses carrier sending and packet collision detection to coordinate network traffic flow.

	5.	A far-reaching system of networks that form a complex whole.

	6.	The extensive research network that preceded the Internet.

	7.	The high-speed links between networks in this are typically made possible by fiber-optic connections.

	8.	A layered communications protocol used by IBM for communications between IBM mainframe computers and terminals.

	1.	ANS:	D	PTS:	1	REF:	5

	2.	ANS:	E	PTS:	1	REF:	8

	3.	ANS:	A	PTS:	1	REF:	2

	4.	ANS:	G	PTS:	1	REF:	28

	5.	ANS:	B	PTS:	1	REF:	4

	6.	ANS:	I	PTS:	1	REF:	27

	7.	ANS:	C	PTS:	1	REF:	4

	8.	ANS:	F	PTS:	1	REF:	20

SHORT ANSWER

	1.	Computer networks are typically classified according to what?  What are the types of computer networks?

ANS:	
Computer networks are typically classified according to their reach and complexity.  The three types of computer networks are local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs).

PTS:	1	REF:	2

	2.	Which network properties enable you to distinguish one type of network from another?

ANS:	
The following network properties enable you to distinguish one type of network from another:
1.  Communications medium
2.  Protocol
3.  Topology
4.  Network type (private versus public)

PTS:	1	REF:	6

	3.	A network's design layout is referred to as what?  Describe each component of the layout.

ANS:	
A network's design layout is referred to as its topology.  A network topology has two components: the physical layout of the cable and the logical path followed by network packets or frames sent on the cable.

PTS:	1	REF:	7

	4.	What is terminal emulation?

ANS:	
Terminal emulation is the use of software to make a computer, such as a PC, behave as though it were a terminal.

PTS:	1	REF:	29

	5.	In 1990, the US and Sweden implemented SS7 in telecommunications using a new technology called common channel signaling.  List 5 services that were available in conjunction with telecommunications servers.

ANS:	
Services that were available in conjunction with telecommunications servers are:
1.  Call forwarding , conferencing, and call waiting
2.  Automated recall and callback
3.  Multiple telephone numbers through one residential telephone line
4.  Voice mail
5.  Caller ID
6.  Voice-activated dialing features
7.  Redirection of 800 number calls when needed because of excessive traffic

PTS:	1	REF:	17

	6.	What is a backbone?

ANS:	
A backbone is a high-capacity communications medium that joins networks on the same floor in a building, on different floors, and across long distances.

PTS:	1	REF:	19

	7.	What is client/server computing?

ANS:	
Client/server computing is a computer hardware and software design in which different portions of an application execute on different computers on or different components of a single computer.  Typically, client software supports user input/output, and the server software conducts database searches, manages printer output, and the like.

PTS:	1	REF:	21

	8.	What is a gateway?  What is a typical function of a gateway?

ANS:	
A gateway is a network device that enables communications between different network devices, systems, or protocols, and it can operate at any network communications level.  A typical function of a gateway is to convert one protocol to another.

PTS:	1	REF:	24

	9.	What is encapsulation?

ANS:	
Encapsulation is a process for converting a frame between networks that places the data frame of one type of network inside the header format used by another network. The new header acts like an envelope used to send a letter.

PTS:	1	REF:	25