Answers to Chapter 3 Q&A Section 401
Answers to Chapter 3 Q&A Section
1
Which router is best used as a central site router: 2611, 3640, or 1004?
The 3640 router provides more power than the 2611 or 1004. Therefore, it is the best
choice of the three for a central site router.
2
Which router best serves as a small office or home office (SOHO) router for
telecommuters: 7200, 700, or 7500?
The 700 router is best suited for the role of a SOHO router. The 7200 and 7500 routers are
suited for roles as core routers.
3
Which WAN technology is best suited for providing high-density dial-up access for remote
users?
Primary Rate Interface (PRI) is best suited due to the number of independent access
channels it makes available to users.
4
Which WAN technology is best suited for variable bandwidth (low-speed to high-speed)
deployments that enable the connection of multiple branch offices to a central site?
Frame Relay is typically deployed in a hub and spoke topology and enables 56-kbps to
45-Mbps connectivity.
5
What does a green LINK LED signify on an Ethernet interface?
A green LINK LED signifies that the connection to the Ethernet network has been
properly established.
6
On a 1600 router, what is the CD LED?
The CD LED is the Carrier Detect indicator. This light signifies that service provider
signal is being received on the interface.
7
List four routers that would be suitable for use as central site routers.
The suitable routers are 7200, 3640, 4000, AS5300, and 12000 (although not discussed).
8
List three routers that would be suitable for use as branch office routers.
The suitable routers are 1600, 1700, 2500, 2600, and 3620. There are others.
9
List a possible cause of an OK LED not being green on a 1600 router.
If the OK LED is not green, this indicates that the router failed one or more portions of
the boot sequence and is possibly functioning improperly.
10
List a possible cause of a LINK LED not being lit on an Ethernet interface.
If there is no LINK light, the cause is fairly simple. Either there is no cable attached, or
the cable is bad. Another possible cause is lack of power to the hub or switch to which the
router is attached.