CompTIA Network+ Certification Study Guide part 68 pptx

Answers B and C are incorrect because a decentralized or distributed network has resources and administration that spans the entire networkA. Because the network doesn’t extend across a

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NETworK+ ExAM N10-004

Self Test Appendix

ChApTEr 1: NETworK FuNdAMENTAlS

You are creating a network for a small business with only four

1

employees Because employees often leave the office to visit clients,

a minimum of one person is in the office and using a computer at

any given time Currently there are two computers in the office,

but the company is willing to purchase more if needed Based on

this information, what is the minimum number of computers that

you’ll need to create a network?

A One

B Two

C Three

D Four

Correct answer and explanation: B Two A network can exist when two or

more computers are connected together to form a network Although

addi-tional computers can be used to create the network, a minimum of two is

required so that the computers can communicate and exchange data

Incorrect answers and explanations: A, C, and D Answer A is incorrect

because at least two computers are necessary to create a network If there is

only one computer, it would be a standalone workstation and not connected

to a network of other computers Answers C and D are incorrect because

the question asks for the minimum number of computers needed to create

a network

A new intranet has been created in your organization and includes

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an FTP site to download files and a news server for sharing

infor-mation The network is internetworked with a network belonging

to a subsidiary of the company The subsidiary’s network uses

Apple computers and uses AppleTalk as a network protocol To

Appendix C

658

access the intranet, which of the following protocols would need to

be installed on your computer?

A IPX/SPX

B NWLink

C TCP/IP

D AppleTalk

Correct answer and explanation: C TCP/IP Most intranets use the same

tech-nologies as the Internet, which uses TCP/IP To access an intranet using a Web browser and fully take advantage of the services it provides, you would need to have TCP/IP installed just as you would if you were going to access the Internet

Incorrect answers and explanations: A, B, and D Answer A is incorrect

because IPX/SPX is a protocol used on Novell NetWare networks but isn’t a protocol that’s used to access Internet sites (such as FTP sites that require TCP/IP) Although IPX/SPX was the default protocol for NetWare, recent

versions use TCP/IP as the default protocol Answer B is incorrect because

NWLink is an IPX/SPX compatible protocol that’s used by Microsoft

operat-ing systems to connect to NetWare networks Answer C is incorrect because

AppleTalk is used for Apple networks, but isn’t the protocol used by various Internet technologies (such as FTP sites)

The LAN used by your organization is on the single floor of a building

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The network has servers and other resources that are kept in a secure server room You are the only network administrator in the organiza-tion and have sole responsibility of managing these resources and ad-ministration of network security for all of the users who are distributed throughout the network What type of network model is being used?

A Centralized

B Decentralized

C Distributed

D Peer-to-peer

Correct answer and explanation: A Centralized Centralized network

models have resources that are centrally located and administered In this situation, there is one network administrator that is responsible for manag-ing servers and other resources that are centrally located

Incorrect answers and explanations: B, C, and D Answers B and C are

incorrect because a decentralized or distributed network has resources and administration that spans the entire network They are not centrally located but various system administrators or designated users provide management

of resources in various areas of the network Answer D is incorrect because

servers are used, making this a client/server model

Your company’s network is on several floors of a building Because

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of the amount of data being stored, there are three file servers, a web

server for the intranet, an e-mail server for internal e-mail, and a SQL

Server that is used for several databases that have been developed in

house Because of security reasons, floppy disks and other devices to

transfer or transmit data to and from the computer have been removed

and aren’t permitted What type of network model is being used?

A Client/server

B Peer-to-peer

C MAN

D PAN

Correct answer and explanation: A Client/server A decentralized network

model has network resources and administration distributed throughout the

network Administration is shared by designating responsibility to system

administrators or individual users, whereas resources such as servers and

other devices are installed at various locations throughout the network By

sharing administrative burdens in this way, certain resources can now be

managed by other members of the organization

Incorrect answers and explanations: B, C, and D Answer B is incorrect

because servers are being used, so this isn’t a to-peer network On a

peer-to-peer network, computers on the network are equals and aren’t in the role of

dedicated servers Answers C and D are incorrect because these aren’t network

models but are types of networks Because the network doesn’t extend across

a metropolitan area, it isn’t a MAN, and because personal devices aren’t being

used to network with computers or other network devices, it isn’t a PAN

Your company’s network spans three buildings that are within

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a mile of one another Three servers are kept in a secure server

room in the building where your office is located, while each other

building has a server that is locked in a closet Users at each of

these locations have been trained on how to replace the backup

tapes in these servers and have the ability to give permissions

for user accounts to print to specific printers in those locations

You solely control other aspects of security, inclusive to password

requirements, and access to folders on these servers What type of

network model is being used?

A Centralized

B Decentralized

C P2P

D Peer-to-peer

Appendix C

660

Correct answer and explanation: B Decentralized A decentralized

net-work model has netnet-work resources and administration distributed through-out the network Administration is shared by designating responsibility to system administrators or individual users, whereas resources such as servers and other devices are installed at various locations throughout the network

By sharing administrative burdens in this way, certain resources can now be managed by other members of the organization

Incorrect answers and explanations: A, C, and D Answer A is incorrect

because a centralized network has resources and administration that are

centrally located and administered Answers C and D are incorrect because

peer-to-peer (P2P) networks are where computers on the network are equals and act both as clients and servers Dedicated servers are used in this sce-nario, making it a client/server model

A company has hired you to create a network for their small

busi-6

ness Security isn’t an issue, and there isn’t enough money to hire

or train a permanent network administrator Users of the network routinely work on similar projects, and need to access one another’s data on a regular basis What type of network model will you use?

A Client/server

B Peer-to-peer

C Client

D Server

Correct answer and explanation: B Peer-to-peer On a peer-to-peer

net-work, computers on the network are equals and have the ability to access data and services they’ve been permitted to use on other machines, as well

as provide services and data to others

Incorrect answers and explanations: A, C, and D Answer A is incorrect

because the requirements specified in the question define a peer-to-peer net-work model A client/server model provides increased security, which isn’t needed for this network, and also generally requires someone to be hired or

trained as a network administrator Answers C and D are incorrect because

these aren’t network models but are roles on a client/server network A client requests data and resources, whereas a server provides them

A company has multiple offices that are internetworked Office A

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has a single computer that has the ability to dial into the Internet, but isn’t connected to the other offices Office B is in another part

of the country from the other offices, but doesn’t have its network

interconnected to the other offices Office C and D are in separate

states, but have a dedicated connection between them Office C has

20 computers that access each other’s machines, and provide

ser-vices and data to one another Office D has 50 computers that log

onto the network using a single server Based on this information,

which of the Offices are part of a LAN and a WAN?

A Office A and B

B Office B and C

C Office C and D

D The entire network (Office A, B, C, and D)

Correct answer and explanation: C Office C and D Both of these offices

have LANs Office C has a peer-to-peer network, whereas Office D has a

client/server network They are interconnected to one another, and thereby

part of a WAN

Incorrect answers and explanations: A, B, and D Answer A is incorrect

because Office A doesn’t have a network, but only an Internet connection

It is also wrong because Office B isn’t part of a WAN Answer B is incorrect

because although it has a LAN, it isn’t connected to the other networks and

therefore isn’t part of the WAN Answer D is incorrect because not every

office has a LAN and the others connected together form a WAN

An organization has offices in two countries Office A is a small

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field office with two networked computers and is internetworked

with Office B that is across the road and has 10 networked

com-puters Because they are a subsidiary of the main company and

perform different services from the rest of the organization, neither

of these offices have been internetworked with the other offices,

and both are awaiting Internet connectivity to be provided next

month Office C is another field office that has a single computer,

isn’t networked with other offices, and has an Internet connection

Office D is the headquarters of the company, has 100 network users

who are awaiting Internet connectivity to be added to the network,

and has a network connection to Office E in London, which is their

European office Based on this information, which of the offices is

connected to the largest WAN?

A Office A

B Office B

C Office C

D Office D

Appendix C

662

Correct answer and explanation: C Office C Office C is connected to the

Internet, which is the largest wide area network

Incorrect answers and explanations: A, B, and D Answers A and B are

incor-rect because Office A and Office B are networked together, but are across the road from one another, and have the smallest number of network users (except

for Office C that has no users who are part of this network) Answer D is

incor-rect because although they have a WAN connecting the LANs in each country, Office D doesn’t have a connection to the Internet (which is the largest WAN)

A company wants to create a LAN between two networks in

dif-9

ferent cities To connect them, you want to have the fastest pos-sible connection to meet their needs Each network has massive amounts of data being sent between floors of their existing net-worked building, and you determine that at maximum, 1 Mbps

of data will need to be transmitted during normal business hours Although they are a large business, and cost is not a major issue, they don’t want to waste money on getting a solution with a band-width that’s higher than they need What type of connection will you choose in connecting these networks?

A Dial-up modem

B ISDN

C T1

D T3

Correct answer and explanation: C T1 Office C is connected to the Internet,

which is the largest wide area network The company needs to send a maxi-mum of 1 Mbps, which is below the T1 speed of 1.544 Mbps Although slower than T3 (which is more expensive), it meets the needs of the company

Incorrect answers and explanations: A, B, and D Answer A is incorrect

because a dial-up modem has a maximum speed of 56 Kbps, which is well

below what they need Answer B is incorrect because it has lower band-width than required ISDN has a maximum speed of 128 Kbps Answer D

is incorrect because a T3 connection provides speeds ranging from 3 Mbps

to 44.736 Mbps, which makes it too fast for their needs It is also the most expensive, meaning that a T3 would be a waste of money

A company has several offices that are networked together across

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the city Each of the sales representatives uses PDAs to keep track

of appointments with clients The company has just implemented

a new system where the appointments taken by receptionists are automatically uploaded to the PDAs whenever the sales staff enters

the main reception area What types of networks are being used in

this environment? Choose all that apply

A MAN

B SAN

C CAN

D PAN

Correct answers and explanations: A and D MAN and PAN A MAN is a

metropolitan area network and a PAN is a personal area network A MAN

is a group of LANs that are internetworked within a local geographical area,

such as a city A PAN is a network that allows wireless transmission of

infor-mation between computers and devices like PDAs

Incorrect answers and explanations: C and D Answer C is incorrect

because a SAN is a storage area network in which storage devices are

net-worked together on a segment of the network so that computers on a LAN

can view and store data on them Answer D is incorrect because the network

is more dispersed than a CAN A CAN is a campus area network where

internetworked buildings are closely situated together

You have been hired by a company that uses a topology shown in

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Figure 1.8 In looking at the physical layout of your network, which

of the following types of topologies is being used?

A Bus

B Star

C Mesh

D Ring

Correct answer and explanation: A Bus A Bus topology has all the

com-puters connected together using a single cable, which is called a trunk,

back-bone, or segment

Incorrect answers and explanations: B, C, and D Answer B is incorrect

because a Star topology has computer connected to a central hub or switch

Answer C is incorrect because a Mesh topology has every component of the

network connected directly to every other component Answer D is incorrect

because a Ring topology has computers connected to a cable that loops around

to form a closed ring

FIGurE 1.8

Appendix C

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You receive a call that the network is down In this network, all the

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computers are connected together using a single cable, which they are connected to using T-connectors Looking at the situation, you find that there is no break through the trunk Which of the follow-ing is most likely the cause of the problem?

A A failed network card

B One of the computers is turned off

C T-connectors are missing from the ends of the cable

D Terminators are missing from the ends of the cable

Correct answer and explanation: D Terminators are missing from the ends

of the cable The topology described in the question refers to a Bus topology and states that the entire network is down although there is no cable break Terminators are needed on a Bus topology because they prevent packets from bouncing up and down the cable Terminators need to be attached to each end of the cable to absorb electronic signals This clears the cable to allow other computers to send packets on the network If there is no termination, the entire network fails

Incorrect answers and explanations: A, B, and C Answer A is incorrect because a failed network card would only effect one computer Answer B is

incorrect because a Bus topology is passive and doesn’t require each

com-puter to be present to receive and resend data along the cable Answer C is

incorrect because T-connectors are used to connect the computers to the cable They aren’t used to terminate the ends of a cable

Your network uses cells to send and receive data to and from

com-13

puters This allows computers in different buildings to be networked together, so they can access data from servers in either building A topology map has been created, using circles to identify the areas that computers can be placed to access the network Based on this information, which of the following topologies is being used?

A Star

B Mesh

C Wireless

D Ring

Correct answer and explanation: C Wireless A Wireless topology uses

transmitters called cells, which broadcast the packets using radio frequen-cies The cells extend a radio sphere around the transmitter in the shape of

a bubble that can extend to multiple rooms and possibly different floors in

a building

Incorrect answers and explanations: A, B, and D Answer A is incorrect

because a Star network doesn’t use cells to send and receive data to and from

computers It cables computers to a centralized hub Answer B is incorrect

because a Mesh topology also doesn’t use cells but uses the most amount of

cable out of any other topology due to multiple connections between a

com-puter and other comcom-puters on the network Answer D is incorrect because a

Ring topology also doesn’t use cells but has computers connected to a looped

cable

You are training a new member of the IT Staff, and decide to

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explain the topology of the existing network, shown in the

Figure 1.9 What topology is currently being used?

A Bus

B Star

C Mesh

D Ring

Correct answer and explanation: C Mesh A Mesh topology has every

component of the network connected directly to every other component

This creates an extremely fault tolerant network but is expensive and

dif-ficult to maintain

Incorrect answers and explanations: A, B, and D Answer A is incorrect

because a Bus topology has all the computers in a Bus topology are connected

together using a single cable, which is called a trunk, backbone, or segment

Answer B is incorrect because a Star topology has computer connected to a

central hub or switch Answer D is incorrect because a Ring topology has

computers connected to a cable that loops around Although all the

compo-nents shown in the figure are connected in a similar manner, there is

addi-tional cabling to connect every one of them to each other

FIGurE 1.9