Tuesday, September 16, 2008

Here are the answers to your free Cisco practice exam questions posted on Monday, September 15!

CCNA Certification And CCENT Certification:

What's the net effect of the following two commands?

line con 0
exec-timeout 0 0
logging synchronous

Answer: Setting the exec-timeout command to zero minutes and zero seconds effectively disables the console line timeout, since that's where we're configuring the command. The logging synchronous command prevents console messages from appearing while you're entering a command; the message will appear after you hit Enter.

Both of these are great Cisco home lab commands, and they just might pop up on an exam or two as well!

CCNA Security Certification / CCNP ISCW Exam:

The configuration of which of the following must include a Crypto ACL?

A. IOS Firewall





Extra credit: What exactly does a Crypto ACL do, anyway?

Answer: C. You'll need a Crypto ACL with a VPN configuration, and it's the Crypto ACL that indicates the traffic that should be protected by the VPN.

CCNA Wireless:

Which of the following uses AES as its encryption method?






Answer: C.

CCNA Voice:

An Auxilary VLAN is designed to carry what kind(s) of traffic?

A. voice

B. low-priority data

C. video

D. multicasting control traffic (in PIM Dense only)

E. multicasting control traffic (for both PIM Dense and Sparse)

F. network control traffic

Answers: A, C. This particular type of VLAN is designed to carry voice and video traffic.

CCNP Certification / BSCI Exam:

Short answer: The reserved IP address is reserved for what protocol, network service, or router transmission type?

Answer: is the "all routers" multicast address.

CCNP Certification / BCMSN Exam:

Which of the following can be specifically configured to protect against a rogue switch becoming the root switch of your network?

A. BPDU Guard

B. Uplinkfast

C. Backbonefast

D. Root Guard

Answers: A, D. Both BDPU Guard and Root Guard can help prevent this situation.

CCNP / ONT Exam:

Short answer: What is the Nyquist Theorem?

Answer: We need a guideline for how many voice samples to take, and the Nyquist Theorem is that guideline. According to this theorem, the sampling rate should be twice as high as the highest frequency of the signal for the signal to be accurately rebuilt at the destination.

I'll have new questions for you later today! I've also posted answers to the three CCNP exams I posted on the website, along with a brand-new CCNA/CCNP home lab video on configuring a frame relay switch - look for links to all these great features in today's other blog posts!

To your success,

Chris Bryant
CCIE #12933

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