Here are the answers to Friday's Cisco and CompTIA certification exam practice questions! All Friday questions are short answer.


CCNA:

What range of IP addresses is reserved for "experimental use"?

Answer: This is the Class E range 240.0.0.0 - 255.255.255.255.


Network+ :

Name two protocols that can dynamically assign IP addresses to hosts requesting them.

Answer: Both Reverse Address Resolution Protocol (RARP) and Dynamic Host Configuration Protocol (DHCP) can do this.


Security+ :

Briefly describe the term birthday attack.

Answer: A birthday attack is a brute force attack that applies the birthday paradox to guessing passwords -- the probability that two or more people in a group of 23 sharing the same birthday is over 50%.


CCNP / BSCI:

What routing code does OSPF assign routes learned by the OSPF domain via redistribution?

Answer: These are marked as 0 E2 routes (OSPF External Type-2).


CCNP / BCMSN:

Name the three dot1x port authentication modes.

Answer: force-authorized, force-unauthorized, and auto.



CCNP / BCRAN:

Given a CIR of 128 KBPS and a time interval of 1/8th of a second, what is the Bc?

Answer: 128000 x .125 = 16000


CCNP / CIT:

Name five of the eight UDP broadcasts that are translated into unicasts by the ip helper-address command.

Answer: TFTP (69), BOOTP Client (67), BOOTP Server (68), Time (37), TACACS (39), DNS (53), NetBios name service, (137), and NetBios Datagram Service (138).



See you later today with a fresh set of Cisco and CompTIA certification practice questions, and I'll see you on Monday with my new Ultimate Network+ Exam Study Package!

To your success,

Chris Bryant
CCIE #12933
www.thebryantadvantage.com

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