Let’s test your knowledge of Cisco router password recovery, the configuration register, and other vital Cisco exam topics!
CCNA And CCENT Certification:
As part of a password recovery procedure on a 2500 router, the configuration register will be changed to 0x2142. What does this change force the router to do?
A. Erase NVRAM contents
B. Erase the existing enable password
C. Ignore the contents of NVRAM
D. Erase the existing starting configuration
Answer: C. The contents of NVRAM will be ignored during the boot process, but not erased.
CCNP Certification / BSCI Exam:
Short answer: Name three methods of migrating from IPv4 to IPv6.
Answer: Three such methods are 6to4 tunneling, NAT-PT, and Dual Stack.
CCNP Certification / BCMSN Exam:
A VTP switch has a revision number of 5. This switch receives a VTP advertisement with a revision number of 6. What action(s) will this switch take?
A. The advertisement is accepted.
B. The advertisement is rejected.
C. The receiving switch increments its revision number.
D. The receiving switch decrements its revision number.
E. The receiving switch does nothing to its revision number.
Answer: A, C. The VTP switch will accept the advertisement; since the revision number of the ad is higher than its own, the advertisement is more recent. The switch will then increment its revision number by one.
CCNP Certification / ISCW Exam:
Which of the following is generally considered the strongest symmetric encryption algorithm?
A. AES
B. 3DES
C. DES
D. RSA
E. Diffie-Hellman
Answer: A. Both AES and 3DES are strong symmetric encryption algorithms, but AES is considered the stronger of the two. Both RSA and Diffie-Hellman are asymmetric encryption algorithms.
CCNP Certification / ONT Exam:
Which of the following does 802.11 use for avoiding unnecessary collisions?
A. CSMA/CD
B. CSMA/CA
C. CSMA/CB
D. CSCA/CC
Answer: B. 802.11 uses Carrier Sense Multiple Access / Collision Avoidance (CSMA/CA).
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