Review Questions

1.  A remote gateway:

A.  Provides access to a single application or service

B.  Provides access to a display-only connection

C.  Places the remote workstation on a slower extension of the LAN

D.  None of the above

2.  Remote-control solutions:

A.  Are very limited because they allow access to only one application

B.  Are very limited because there must be a connection in order to access applications and data

C.  Cannot be used for remote access

D.  Always consume more bandwidth than other remote-access solutions

3.  Deployment of remote node systems:

A.  Is extremely costly and serves a single function, which impacts scalability

B.  Allows administrators to control all applications at a central source

C.  Requires the use of fixed locations for remote users

D.  Provides an effective connection to the LAN, although it is usually slower

4.  The designer needs to provide 10 remote users with dial-in access. Cisco recommends that this design use:

A.  The 2500 series platform with internal modems

B.  The 2500 series platform with external modems

C.  The 760 series router

D.  The 7000 series router with the AS5200 modem bank

5.  Because of billing and low-bandwidth factors, designers should incorporate which of the following into their X.25 designs?

A.  Full-mesh configurations

B.  PVC installations only

C.  Traffic filters and static routes

D.  Traffic filters only, as static routes are not available in Cisco’s X.25 implementation

6.  Which of the following is not true regarding X.25?

A.  Provides high reliability

B.  Provides high bandwidth

C.  Cannot provide DCE functionality

D.  Cannot provide DTE functionality

7.  The X.25 protocol relates to which layer of the OSI model?

A.  Application

B.  Session

C.  Data link

D.  Network

8.  True or false: A Cisco router cannot provide X.25 switching services.

A.  True

B.  False

9.  Which of the following is not an encryption technology for tunnels on ISDN?

A.  L2F

B.  CDP

C.  PPTP

D.  L2TP

10.  ISDN PRI provides which of the following?

A.  Two B channels and one D channel for a total of 144Kbps

B.  23 B channels and one D channel on a T1

C.  24 B channels on a T1

D.  12 B channels for data and 12 B channels for voice on a T1

11.  A service that provides a LAN-equivalent, albeit slower, connection to the corporate network is called:

A.  Remote gateway

B.  Remote control

C.  Remote network

D.  Remote node

12.  The network architect does not wish to deploy a full-mesh X.25 network. The best solution would be to do which of the following?

A.  Select another protocol, as X.25 must be configured in a full mesh.

B.  Use subinterfaces.

C.  Use the X.121 specification.

D.  Use the LAPB protocol and tunnel X.25 in PPP.

13.  Cable modems are most similar to which of the following technologies?

A.  X.25

B.  Frame Relay

C.  ATM

D.  Ethernet

14.  True or false: MMP is an open standard.

A.  True

B.  False

15.  A benefit of ISDN in the home office is:

A.  Greater bandwidth than any other technology

B.  Low cost

C.  Data and voice services on the same BRI

D.  Always-on service

16.  A dial-in server that provides access to the company’s e-mail system is typically part of:

A.  A remote-node solution

B.  A remote-control solution

C.  A remote-gateway solution

17.  Multilink Multichassis PPP operates:

A.  Between two devices, connecting a single BRI circuit between them

B.  Between a single remote device and two local devices, terminating a data channel on one server and a control channel on the other

C.  Across multiple routers and access servers

D.  With ISDN PRI only

18.  Compared to Frame Relay, X.25 has:

A.  Higher latency

B.  Higher bandwidth

C.  Less overhead

D.  Less international support

19.  True or false: Both Frame Relay and X.25 support subinterfaces.

A.  True

B.  False

20.  ISDN BRI provides how much B channel bandwidth for the user?

A.  64Kbps

B.  128Kbps

C.  144Kbps

D.  1.544Mbps

Answers to Review Questions

1.  A.

2.  B.

3.  D.

4.  B.

5.  C.

6.  B.

7.  D.

8.  B.

9.  B.

10.  B.

11.  D.

12.  B.

13.  D.

14.  B.

15.  C.

16.  C.

17.  C.

18.  A.

19.  A.

20.  B.