Quản trị mạng Chapter1

Quản trị mạng

1 Put the following WAN connections in the order of fastest to slowest:

ISDN BRI

Asynchronous Dialup

ISDN PRI

Leased Line

2 You need to support a mobile sales group who needs access to email from a variety of locations What best meets the needs of the sales group?

Digital service

Multi-mode service

Asynchronous service

High-Speed Serial (HSSI) interface

3 What is the default encapsulation-type set on Cisco router serial interfaces?

Frame Relay

HDLC

PPP

LAPB

4 Under which two circumstances can a leased line WAN connection considered to be cost effective?

Short distances

Long connection times

Short connection times

When little control over the WAN is needed

5 When would a dedicated leased line be cost effective?

For short connect times and short distances

For long connect times and long distances

For long connect times and short distances

For short connect times and long distances

6 Which three WAN connections are typically employed at telecommuter sites?

Asynchronous dial-up

ISDN BRI

Leased lines

HDSL

Cable modems

Frame Relay

7 When using a CATV cable service as an Internet connection medium, what is "upstream traffic"?

Traffic getting at the user's home traveling to the head-end

Traffic between the head-end and the supplier antenna

Broadcast traffic, including the cable TV signals

Traffic from outside the local cable segment serving the user's home

8 A small remote site requires a low cost T1-speed connection to make secure file transfers to a central site located several hundred miles away Which connection type will meet the

requirements of this application?

DSL

Leased line

ATM

Frame Relay

9 What device would you use if you had 200 users that needed continuous access to the home office?

Leased line

Frame Relay

Asynchronous

ISDN

10 When would a packet-switched network be cost effective?

For short connect times and small geographic differences

For long connect times and large geographic differences

For long connect times and small geographic differences

For short connect times and large geographic differences

11 A bank needs to connect a branch office to the corporate network on the other side of town The branch office has twelve users that require constant access to the bank's central accounting system throughout the day Which two connection types may be most appropriate for this branch office?

ISDN BRI

Frame Relay

Asynchronous

Dedicated lease line

12 Which three of the following are examples of DTE devices?

Mainframe computer

CSU/DSU

Router

Terminal

Modem

13 Which user requirement is best served by an access server?

Mobile sales force requiring dial-in access

Mobile sales force requiring dedicated connection

Corporate staff requiring access to web-bases applications

Corporate staff requiring access to applications on corporate systems

14 How do you know when a router is properly initialized?

When it stops making noise from the boot process

LED enable light is active

When the router beeps

The power light is on

15 Each company site can be placed into one of three categories What are the three

categories?

Satellite Site

Central Site

Branch Office

Remote or Home Office

16 What are two advantages of a Frame Relay connection over dedicated leased lines? Better suited multiple branch locations

Lower cost

More control over the connection

Full guaranteed bandwidth

17 Which two WAN connections provide a single pre-established switched circuit reserved for

the private use of the customer?

Digital cable

T1 leased line

ISDN

Asynchronous dial-in

56K dedicated line

18 What would you use if you had 30 users that needed occasional access to the home office? Leased line

Frame Relay

Asynchronous

ISDN