Quản trị mạng Chapter1

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