WAN Chapter 1

1.

1 point

How are Frame Relay virtual circuits identified?

CIR

VPI

DLCI

SPID

MAC

2.

1 point

What WAN technology is designed to deliver data, voice, and video simultaneously built on a cell-based architecture?

Frame Relay

Cable

ISDN

ATM

3.

1 point

Which layer of the hierarchical network design model is often called the backbone?

Workgroup

Distribution

Core

WAN

Network

Access

4.

1 point

What is ATM?

Provides a high-bandwidth Layer 2 network that can manage data, voice, and video all on the same infrastructure.

Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier.

Operates at the network layer, and the SVC is identified by a channel number.

Built on a cell-based architecture in which the cell has a fixed length of 53 bytes.

5.

1 point

ISDN PRI is composed of how many B channels in North America?

2

30

23

64

16

6.

1 point

At which layer of the hierarchical network model do users connect to the network?

Core

Network

Access

Application

Distribution

7.

1 point

Which of the following are for Core Layer? (Choose two)

A high-speed backbone that is designed to switch packets as fast as possible.

In the WAN environment, it may give teleworkers or remote sites access to the corporate network across WAN technology.

Grants user access to network devices.

In a network campus, it generally incorporates switched LAN devices with ports that provide connectivity to workstations and servers.

Critical for connectivity, it must provide a high level of availability and adapt to changes very quickly. It also provides scalability and fast convergence.

Aggregates WAN connections at the edge of the campus and provides policy-based connectivity.

Aggregates the wiring closets, using switches to segment workgroups and isolate network problems in a campus environment.

8.

1 point

What is Frame Relay?

Built on a cell-based architecture in which the cell has a fixed length of 53 bytes.

Provides a high-bandwidth Layer 2 network that can manage data, voice, and video all on the same infrastructure.

Operates at the network layer, and the SVC is identified by a channel number.

Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier.

9.

1 point

Which hierarchical network model layer is responsible for containing network problems to the workgroups in which they occur?

Application

Core

Access

Distribution

Network

10.

1 point

What is Connectionless packet switching?

A switching technology in which each switch must evaluate the packet’s address to determine where to send it.

A switching technology in which a virtual circuit exists only while a packet travels through it.

A switching technology that establishes routes through the switches for particular end-to-end connections.

A switching technology that has a preestablished dedicated circuit (or channel) between nodes and terminals.

11.

1 point

What term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider?

CPE

Local loop

DCE

DTE

CO

12.

1 point

What is Packet switching?

A switching technology that establishes routes through the switches for particular end-to-end connections.

A switching technology in which a virtual circuit exists only while a packet travels through it.

A switching technology in which each switch must evaluate the packet’s address to determine where to send it.

A switching technology that has a preestablished dedicated circuit (or channel) between nodes and terminals.

13.

1 point

Which goal can be accomplished by implementing the Cisco Enterprise Teleworker Architecture?

It satisfies telephony requirements for users who are located at medium to large enterprise sites.

It allows the enterprise to deliver secure voice and data services to workers no matter where or when they work.

It allows the enterprise to add large branch sites that span geographic areas.

To reduce remote security threats, it forces users who are located at main sites to log on to resources.

14.

1 point

What is Circuit switching?

A switching technology that establishes routes through the switches for particular end-to-end connections.

A switching technology in which each switch must evaluate the packet’s address to determine where to send it.

A switching technology that has a preestablished dedicated circuit (or channel) between nodes and terminals.

A switching technology in which a virtual circuit exists only while a packet travels through it.

15.

1 point

What is Connection-orientated packet switching?

A switching technology in which a virtual circuit exists only while a packet travels through it.

A switching technology in which each switch must evaluate the packet’s address to determine where to send it.

A switching technology that has a preestablished dedicated circuit (or channel) between nodes and terminals.

A switching technology that establishes routes through the switches for particular end-to-end connections.

16.

1 point

Which device is commonly used as Data Terminal Equipment?

CSU/DSU

ISDN

Router

Modem

17.

1 point

Which of the following are for Access Layer? (Choose three)

A high-speed backbone that is designed to switch packets as fast as possible.

In a network campus, it generally incorporates switched LAN devices with ports that provide connectivity to workstations and servers.

Critical for connectivity, it must provide a high level of availability and adapt to changes very quickly. It also provides scalability and fast convergence.

Grants user access to network devices.

Aggregates the wiring closets, using switches to segment workgroups and isolate network problems in a campus environment.

Aggregates WAN connections at the edge of the campus and provides policy-based connectivity.

In the WAN environment, it may give teleworkers or remote sites access to the corporate network across WAN technology.

18.

1 point

Which of the following are for Distribution Layer? (Choose two)

Critical for connectivity, it must provide a high level of availability and adapt to changes very quickly. It also provides scalability and fast convergence.

A high-speed backbone that is designed to switch packets as fast as possible.

Aggregates WAN connections at the edge of the campus and provides policy-based connectivity.

In the WAN environment, it may give teleworkers or remote sites access to the corporate network across WAN technology.

Aggregates the wiring closets, using switches to segment workgroups and isolate network problems in a campus environment.

Grants user access to network devices.

In a network campus, it generally incorporates switched LAN devices with ports that provide connectivity to workstations and servers.

19.

1 point

Which type of WAN connection should you choose when a dedicated point-to-point WAN communications path from the customer premises through the provider network to a remote destination is required?

Analog dialup

ATM

Frame Relay

Leased line

ISDN

20.

1 point

What is Metro Ethernet?

Operates at the network layer, and the SVC is identified by a channel number.

Built on a cell-based architecture in which the cell has a fixed length of 53 bytes.

Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier.

Provides a high-bandwidth Layer 2 network that can manage data, voice, and video all on the same infrastructure.

21.

1 point

What is X.25?

Provides a high-bandwidth Layer 2 network that can manage data, voice, and video all on the same infrastructure.

Built on a cell-based architecture in which the cell has a fixed length of 53 bytes.

Operates at the network layer, and the SVC is identified by a channel number.

Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier.

22.

1 point

The ability to connect securely to a private network over a public network is provided by which WAN technology?

PSTN

ISDN

DSL

VPN

Frame Relay

23.

1 point

Which of the following items are considered WAN devices? (Choose three.)

Bridge

Router

Repeater

Access Server

Ethernet switch

Modem

24.

1 point

Which architecture enables enterprises to offer important network services—such as security, new communication services, and improved application performance—to every office, regardless of its size or proximity to headquarters?

Cisco Enterprise Branch Architecture

Cisco Enterprise Campus Architecture

Cisco Enterprise Data Center Architecture

Cisco Enterprise Teleworker Architecture