Wednesday, December 3, 2014

More neworking questions in the 2014 series - Final?

Time to stretch the grey matter with some more Cisco based networking questions...with some subnetting thrown in to add to the annoyance  :-)



1. If a switch receives a multicast frame, what does it do with it?

A) Forwards it out every port
B) Sends it back to the originator asking for a destination address
C) Drops the frame


2. What is the reserved address space for a Class B network?

A) 10.0.0.0 - 10.255.255.255
B) 20.0.0.0 - 20.255.255.255
C) 172.16.0.0 - 172.31.255.255
D) 192.168.0.0 - 192.168.255.255
E) 208.168.0.0 - 208.168.255.255


(Might need a pencil for the next 2 :-)

3. What valid host range is the IP address 172.25.78.33/27 part of?

4. Which subnet does host 172.26.147.25 255.255.255.224 belong to?

5. IGRP advertises routes to interior, system and exterior routes

A) True
B) False


6. If your switch uses shared memory buffering, what would happen if a packet could not be delivered because of a busy destination port?

A) It would delay transmission of all packets in memory
B) It would be sent to the destination port anyway
C) It would wait in a queue while all other packets in memory are transmitted
D) It would drop the packet after an allocated time


7. What is the default administrative distance of a static route?

A) 1
B) 90
C) 100
D) 110
E) 120


8. Trunk links are used to communicate between...

A) Two switches
B) A switch and router
C) A switch and server
D) A switch and PC
E) A, B and C are correct







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1. Correct Answer A 

Internally multicast is treated as broadcast. So the Switch, will send it to all port except from which it recieve. Same way it will treat broadcast also.


2. Correct Answer C

http://en.wikipedia.org/wiki/Private_network#Private_IPv4_address_spaces


3. 172.25.78.33 through to 172.25.78.62

4. 172.26.147.0

5. 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.


6. Correct Answer C

The area of memory where the switch stores the data is called the memory buffer.

The memory buffer can use two methods for forwarding frames:

port-based memory buffering
shared memory buffering

In port-based memory buffering frames are stored in queues that are linked to specific incoming ports.

Shared memory buffering deposits all frames into a common memory buffer which all the ports on the switch share.


7. Correct Answer A

The default administrative distance for a static route is 1.


8. Correct Answer E

A trunk link is a point-to-point link between two switches, a switch and router or a switch and server which carries multiple VLAN traffic.





Not sure if there will be more questions before Christmas, however I plan new sets for 2015 so come back and we'll have some more lernin... :-)  

Have a good Christmas.