Tuesday, May 14, 2013

Cisco exam questions part viii




Another set of mixed up networking questions to get the grey matter ticking - enjoy.





1. By default is CDP enabled or disabled on compatible devices?

A) Enabled
B) Disabled


2. What is the default setting on a router for the invalid timer if you are using IGRP?

A) 90 seconds
B) 30 seconds
C) 280 seconds
D) 270 seconds
E) 180 seconds


3. What are the default metrics of IGRP?

A) Delay, Bandwidth
B) Load, Reliability
C) Reliability, Bandwidth
D) Delay, Reliability


4. What WLAN standard operates in the 5GHz band with a data rate of up to 54Mbps?

A) 802.11a
B) 802.11b
C) 802.11g
D) 802.11h
E) 802.11n


5. Where is the best position to place an Extended ACL?

A) As close to the destination as possible
B) As close to the source as possible






1. Correct Answer: A

Explanation
CDP is enabled on Cisco routers by default. To disable CDP use the no cdp run command.


2. Correct Answer: D

Explanation
IGRP sends its routing table to its neighbors every 90 seconds. IGRP uses an invalid timer to mark a route as invalid after 270 seconds (three times the update timer). IGRP uses a flush timer to remove a route from the routing table (default flush timer is 630 seconds, seven times the update period).


3. Correct Answer: A

Explanation
IGRP and EIGRP use multiple metric parameters to calculate their composite metric.  These are bandwidth, delay, load, and reliability. By default, IGRP chooses a route based on bandwidth and delay.


4. Correct Answer: A

Explanation
802.11a operates in the 5GHz band with a data rate of up to 54Mbps and is immune to interference from other devices operating in the 2.4GHz spectrum.


5, Correct Answer: B

Explanation
The general rule is to place standard ACLs as close to the destination as possible and to position extended ACLs as close as possible to the source of the traffic that will be denied. This is because extended ACLs can take in to account source and destination addresses as well as port numbers.