To help you prepare for total success on your Cisco certification exams, here are some free practice exam questions to test your knowledge. Enjoy!

CCNA And CCENT Certification:

You have two Cisco routers directly connected at their Serial 0 interfaces. Identify the true statements regarding this connection.

A. The DCE must supply clockrate to the DTE.

B. The DTE must supply clockrate to the DCE.

C. No clockrate needs to be supplied by either side.

D. Both the DTE and DCE must supply clockrate to the other.

E. Since Cisco router Serial interfaces are DTE by default, such a connection literally cannot work.

F. Since Cisco router Serial interfaces are DCE by default, such a connection literally cannot work.

Answer: A. The DCE must supply the clockrate to the DTE. Cisco router Serial interfaces are DTEs by default, but a Serial interface can be configured to run as a DCE. You'll also need a DTE/DCE cable for this connection.

CCNP Certification / BSCI Exam:

Short answer: You are configuring an OSPF router to inject a default route into an OSPF domain. The command you've entered under the OSPF process is "default-information originate". What else do you have to do?

Answer: In this situation, make sure the router has a default route to advertise! To advertise such a route when none actually exists, use "default-information originate always".

CCNP Certification / BCMSN Exam:

What interface-level command, configured on a switch port, will tell the IP Phone not to trust any CoS values sent from a PC connected to the phone?

A. switchport priority no cos trust

B. no mls qos

C. no mls qos trust cos

D. switchport priority extend cos 0

E. switchport priority extend cos 5

Answer: D. The command "switchport priority extend cos x" tells the phone to overwrite the CoS value coming in from the PC. Setting "x" to zero is effectively telling the phone not to trust the incoming CoS value.

CCNP Certification / ISCW Exam:

Short answer: How many classes can be defined for PQ?

Answer: 64.

CCNP Certification / ONT Exam:

In the analog-to-digital conversion process, which of the following is optional?

A. Sampling

B. Quantizing

C. Encoding

D. Compression

Answer: D. Compression is often a good idea, but it's not required.

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