Wednesday, September 25, 2013

Cisco based Networking Questions part xiii

Your time is limited, so don’t waste it living someone else’s life.
 –Steve Jobs

Random Cisco based networking questions and answers to help with accreditation or just for fun :-)

1. What is the function of asymmetric switching?

A) To prioritise bandwidth to nodes that need it
B) To prevent bottlenecks on the port a server is connected to
C) To allow RAS clients to connect to the network


2. What Cisco IOS command executes the configuration stored in NVRAM.

A) config t
B) config mem
C) config net
D) config start


3. How would you disable an interface (Cisco command)?

A) Router(config-if)#shutdown
B) Router(config-if)#disconnect
C) Router(config-if)#disable
D) Router(config-if)#close
E) Router(config-if)#stop


4. What will be the IP address of the second subnet given the following?

172.16.0.0
255.255.224.0
(Assume ip subnet-zero is enabled)

A) 172.16.0.0
B) 172.16.8.0
C) 172.16.16.0
D) 172.16.32.0
E) 172.16.64.0


5, Given the IP address 192.168.10.0 
What subnet mask should you use to create 16 subnets?
(Assume ip subnet-zero is enabled)

A) 255.255.255.240
B) 255.255.240.0
C) 255.240.0.0
D) 255.255.255.248
E) 255.255.248.0


6. What is the Spanning Tree forward delay?

A) The time that is spent in the Listening and Learning states
B) 50 seconds
C) Time taken for a switch to go from Listening to Forwarding
D) Time taken for a switch to go from Blocking to Forwarding


Bonus Question

IGRP advertises routes to interior, system and exterior routes

A) True
B) False






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1. Correct Answer: B
An asymmetric switch provides switched connections between ports of different bandwidths.
Asymmetric switching is optimized for client-server traffic where multiple clients simultaneously communicate with a server, requiring more bandwidth dedicated to the server port to prevent a bottleneck at that port.


2. Correct Answer: B
config mem executes configuration commands stored in NVRAM by copying startup-config to the running-config


3. Correct Answer: A
The interface command shutdown disables an interface.


4. Correct Answer: D
The subnet block size is 256 - 224 = 32
The first subnet will be subnet zero 172.16.0.0
The second subnet will be 172.16.32.0


5. Correct Answer: A
This is a class C IP address, so octets 1-3 cannot be used for subnetting.
24 = 16 subnets, which means we need to borrow 4 bits.
The fourth octet value should therefore be 240.


6. Correct Answer: A
Forward delay — The time that is spent in the listening and learning state, 15 sec by default, but you can tune the time to be between 4 and 30 sec


Bonus Question. Correct Answer: A
IGRP advertises three types of routes:

Interior routes are routes between subnets in the network attached to a router interface.
System routes are routes to networks within an autonomous system.
Exterior routes are routes to networks outside the autonomous system.


How did you go? let me know,,