Tuesday, September 09, 2008

It's Tuesday, September 9, and here are the answers to yesterday's Cisco practice exam questions!

CCNA Certification And CCENT Certification:

What command resulted in the following output, and on what device did you run this command?

C:\> ?

Internet Address Physical Address Type 11-11-11-11-11-11 dynamic

Answer: The command is arp -a, and you're running that on a PC. To see the ARP cache of a Cisco router, run the show arp command.

CCNA Security Certification / CCNP ISCW Exam:

Which of the following statements regarding views and superviews is FALSE?

A. A single IOS command can be contained in one view.

B. A view can be contained in more than one superview.

C. Commands can be directly assigned to both views and superviews.

D. Superviews and views require a password upon creation.

Answer: C. Commands are assigned to views, and views are then assigned to superviews. Commands can't be directly assigned to superviews.

CCNA Wireless:

Both DSSS and OFDM are methods of using spread spectrum. Describe how each performs this "signal spreading".

Answer: DSSS (Direct Sequence Spread Spectrum) doesn't have the signal hop around between frequencies, but instead spreads the signal over the entire range of frequencies at once.

OFDM (Orthogonal Frequency Division Multiplexing) splits the signal and sends the signal fragments over different frequencies at the same time.

CCNA Voice:

Of MGCP, H.323, and SIP, which are considered centralized call control signaling protocols?

Answer: MGCP is the only centralized protocol. The others are distributed signaling protocols.

CCNP Certification / BSCI Exam:

In IGMP version 1, a host can join a multicast group in two different ways. Name them.

Answer: Either by sending a Membership Report or responding to a Membership Request.

CCNP Certification / BCMSN Exam:

What is the net effect of the following switching configuration?

SW1(config)#spanning vlan 1 hello 5
SW1(config)#spanning vlan 1 forward-time 12
SW1(config)#spanning vlan 1 max-age 15

Answer: From top to bottom....

The Root Bridge will send Configuration BPDUs every 5 seconds.

The listening and learning states will each last 12 seconds.

The switch will retain the contents of a superior BPDU for 15 seconds before discarding it.

BTW, these changes will only take effect if configured on the root bridge.

CCNP / ONT Exam:

If you're running AutoQoS on an interface and then change its bandwidth value, do you have to do anything to have AutoQoS use the new setting? If so, what?

Answer: You need to run the AutoQoS process over again - the process does not dynamically adapt to a change in the bandwidth command.

I'll have more questions for you later today!

To your success,

Chris Bryant
CCIE #12933

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