Cisco CCNA mock exam questions sample test – Question 220

.A new trainee is setting up a router in a test lab, and he asks you to describe the use of the connector marked BRI on the router.
Which is a correct use for this connecter?

A. A WAN interface for a T1 connection
B. A LAN interface to connect to a switch
C. An interface to connect a console cable
D. A WAN interface for an ISDN connection

Correct Answer: D

Explanation:
The connector marked BRI is used for an Integrated Services Digital Network (ISDN) connection, specifically a basic rate interface (BRI). An ISDN basic rate interface provides three
channels: a D channel for control signaling, and two B or bearer channels for data, resulting in 128 bits of bandwidth.
A WAN interface for a T1 connection would be connected to a serial port on the router, not the BRI interface. It would not accept a basic rate ISDN connection.
A LAN interface to connect to a switch would be an Ethernet connection that used either an RJ-45 connector or a legacy AUI connector. It would not accept a basic rate ISDN
connection
An interface to a console connector will look like an RJ-45 Ethernet connector but will only accept a console or rollover cable, and is used to manage the router. It would not accept a
basic rate ISDN connection.
These various ports can be seen on the backplane of a router as shown below:
Objective:
WAN Technologies
Sub-Objective:
Describe WAN access connectivity options
References:
http://www.tutorialsweb.com/networking/routers/cisco-rotuers-ios.htm#Hardware% HYPERLINK “http://www.tutorialsweb.com/networking/routers/cisco-rotuers-ios.htm#Hardware%20Components”20 HYPERLINK “http://www.tutorialsweb.com/networking/routers/cisco-rotuers-ios.htm#Hardware%20Components”Components:
Cisco>Support>Product Support>End-of-Sale and End-of-Life Products>Cisco 3600 Series Multiservice Platforms>Troubleshoot and Alerts> Troubleshooting TechNotes>
Understanding the 1-Port ISDN BRI (S/T) WAN Interface Card (WIC-1B-S/T or WIC36-1B-S/T)