Here are the answers to Tuesday's Cisco certification training questions!
There are two new CCNA / CCNP training videos on the blog today, too! :) One is of particular interest to CCNP candidates, and the other is of general interest to all Cisco certification exam students - so be sure to read today's other blog posts for these important videos!
Which of the following are Cisco router Serial interface defaults?
A. Encap is PPP
B. Encap is HDLC
C. Encap is Frame Relay
D. Interface type is DCE
E. Interface type is DTE
F. Clockrate is 56000 bps
G. There is no default clockrate setting
Answer: B, D, G. By default, Cisco serial interfaces run HDLC, they're DTE interfaces, and there's no clockrate setting.
What globally configured command would impose a 15-second delay on authentication attempts after four failed logins?
Answer: security authentication failure rate 4. You can add a log option to the end of that command if you like.
Identify the EIGRP reliable packet types.
Answer: F. EIGRP Reply, Query, and Update packets are considered reliable.
What MAC address is reserved for HSRP purposes?
Extra credit: Part of that address is a variable. Exactly what HSRP value determines that variable?Answer: The MAC address 00-00-0c-07-ac-xx is HSRP's well-known virtual MAC address, and xx is the group number in hexadecimal.
In the world of wireless networking, what is "Michael"? What is "Michael's" biggest security vulnerability?
Answer: WPA uses an 8-byte Message Integrity Check (MIC), sometimes called "Michael", to protect against replay attacks, spoofing, and man-in-the-middle attacks.
There's a potential issue with "Michael" (MIC). Access points that run WPA will shut down their Basic Service Set if it receives two packets, one right after the other, that has a bad MIC. A DoS attack specifically designed to counteract Michael can take advantage of this situation.
I'll have more Cisco practice exam questions for you later today, as well as an important (and free!) CCNP video. See you then!
To your success,