A small office network with ten computers uses a cable modem and router to connect to the
Internet and distribute services to clients. After several weeks of use, the routers collision LED
(Light Emitting Diode) has begun to stay on permanently. What is the MOST likely cause of the
problem and the FIRST troubleshooting steps?

A.
There are too many collisions occurring in traffic. Disconnect each network card individually to
find and replace the one that is broadcasting.

B.
The cable modem is set to receive packets at a faster rate than the routers receive port allows.
Lower the buffer threshold limits to correct levels.

C.
The routers primary link to the modem has been lost. Reboot the modem and router to reset
the link.

D.
The router has been compromised by an external source attack. Modify the routers registry to
disallow the offending IP (Internet Protocol) source from connecting again.