Introduction to Networks Flashcards

1
Q

You need a network that provides centralized authentication for your users. Which of the following logical topologies should you use?

VLANs

Peer-to-peer

Client-server

A

Client-server

A client-server logical topology allows you to have a centralized database of users so that authentication is provided in one place

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2
Q

You need a topology that is scalable to use in your network. Which of the following will you install?

Bus

Ring

Star

A

Star

To install a physical topology that provides ease of scalability, use a star network. This is a hub or switch device, and this is the most common LAN network today

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3
Q

Which of the following physical topologies has the most connections and is the least popular for LANs?

Start

Ring

Mesh

A

Mesh

Only a mesh physical topology has point-to-point connections to every device, so it has more connections and is not a popular LAN technology

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4
Q

In a physical star topology, what happens when a workstation loses its physical connection to another device?

The ring is broken, so no devices can communicate.

Only that workstation loses its ability to communicate.

That workstation and the device it’s connected to lose communication with the rest of the network.

A

Only that workstation loses its ability to communicate.

In a star topology, each workstation connects to a hub, switch, or similar central device but not to other workstations. The benefit is that when connectivity to the central device is lost, the rest of the network lives on

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5
Q

Which type of WAN technology uses labels, which enables priority of voice though the network?

VPN

T1

MPLS

A

MPLS

Multiprotocol Label Switching has as many advantages as a LAN protocol. When labels are used, voice can have priority over basic data, for example

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6
Q

What is a logical grouping of network users and resources called?

WAN

LAN

MPLS

A

LAN

A logical grouping of hosts is called a LAN, and you typically group them by connecting them to a hub or switch

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7
Q

Which of the following is a concern when using peer-to-peer networks?

Where to place the server

Whose computer is least busy and can act as the server

The security associated with such a network

A

The security associated with such a network

It is easy to relax about security in a peer-to-peer environment. Because of the trouble it takes to standardize authentication, a piecemeal approach involving users’ personal preferences develops. There are no dedicated servers in a peer-to-peer network, and such a network can be created with as few as two computers

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8
Q

Which of the following is an example of when a point-to-multipoint network is called for?

When a centralized office needs to communicate with many branch offices

When a full mesh of WAN links is in place

When multiple offices are daisy-chained to one another in a line

A

When a centralized office needs to communicate with many branch offices

When a central office, such as headquarters, needs to communicate directly with its branch offices but the branches do not require direct communication with one another, the point-to-multipoint model is applicable. The other scenarios tend to indicate the use of a point-to-point link between sites

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9
Q

Which of the following is an example of a LAN?

Ten routers interconnected by Frame Relay circuits

Two routers interconnected with a T1 circuit

A computer connected to another computer so they can share resources

A

A computer connected to another computer so they can share resources

LANs generally have a geographic scope of a single building or smaller. They can range from simple (two hosts) to complex (with thousands of hosts)

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10
Q

Which of the following is a disadvantage of the star topology?

When a single port on the central concentrating device fails, the entire network loses connectivity.

When the central concentrating device experiences a complete failure, all attached devices lose connectivity to the rest of the network.

In a star topology, a more expensive type of host must be used compared to the host used when implementing a physical bus.

A

When the central concentrating device experiences a complete failure, all attached devices lose connectivity to the rest of the network.

The only disadvantage mentioned is the fact that there is a single point of failure in the network. However, this topology makes troubleshooting easier; if the entire network fails, you know where to look first. The central device also ensures that the loss of a single port and the addition of a new device to an available port do not disrupt the network for other stations attached to such a device

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11
Q

What is a difference between a LAN and a WAN?

WANs require a router.

WANs cover larger geographical areas.

WANs can utilize either private or public data transport.

All of the above.

A

All of the above.

A typical WAN connects two or more remote LANs together using someone else’s network (your ISP’s) and a router. Your local host and router see these networks as remote networks and not as local networks or local resources. Routers use proprietary serial connections for WANs

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12
Q

Which of the following provides the most physical layout flexibility in a very large, geographically dispersed enterprise network?

LAN switch

Star topology

MPLS cloud network

A

MPLS cloud network

Multiprotocol Label Switching provides logical links between sites, so branch offices can be easily and quickly added

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13
Q

In what type of network are all computers considered equal and do not share any central authority?

Peer-to-peer

Client-server

Physical topology

A

Peer-to-peer

In a peer-to-peer network, all computers are considered equal. It is up to the computer that has the resource being requested to perform a security check for access rights to its resources

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14
Q

What advantage does the client-server architecture have over peer-to-peer?

Easier maintenance

Greater organization

Tighter security

All of the above

A

All of the above

In client-server networks, requests for resources go to a main server that responds by handling security and directing the client to the resource it wants instead of the request going directly to the machine with the desired resource (as in peer-to-peer)

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15
Q

Which of the following is an example of a hybrid network?

Ethernet switch

Ring topology

Bus topology

A

Ethernet switch

The best answer to this question is an Ethernet switch, which uses a star physical topology with a logical bus technology

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16
Q

You have a network with multiple LANs and want to keep them separate but still connect them together so they can all get to the Internet. Which of the following is the best solution?

Add more hubs.

Implement more switches.

Install a router.

A

Install a router.

Routers are used to connect different networks together

17
Q

Which type of topology has the greatest number of physical connections?

Star

Point-to-point

Mesh

A

Mesh

In the mesh topology, there is a path from every connection to every other one in the network. A mesh topology is used mainly because of the robust fault tolerance it offers—if one connection goes on the blink, computers and other network devices can simply switch to one of the many redundant connections that are up and running

18
Q

What type of topology gives you a direct connection between two routers so that there is one communication path?

Point-to-point

Star

Bus

A

Point-to-point

As its name implies, in a point-to-point topology you have a direct connection between two routers, giving you one communication path. The routers in a point-to-point topology can either be linked by a serial cable, making it a physical network, or be far away and only connected by a circuit within a Frame Relay network, making it a logical network

19
Q

Which network topology is a combination of two or more types of physical or two or more types of logical topologies?

Point-to-multipoint

Hybrid

Bus

A

Hybrid

A hybrid topology is a combination of two or more types of physical or logical network topologies working together within the same network

20
Q

When designing a network and deciding which type of network topology to use, which item(s) should be considered? (Select all that apply.)

Cost

Ease of installation

Ease of maintenance

Fault tolerance requirements

A

Cost

Ease of installation

Ease of maintenance

Fault tolerance requirements

Each topology has its own set of pros and cons regarding implementation, so it’s important to ask the right questions and consider cost, ease of installation, maintenance, and fault tolerance