Saturday, August 16, 2014

Cisco base networking questions for 2014 - part 7

Here's some more random networking to activate the brain cells... enjoy!!!

Thought it was about time I started 
adding to the collection :-) apologies for the gap.

 1. What is the correct sequence of Spanning Tree states?

A) Blocking, Listening, Learning, Forwarding, Disabled
B) Disabled, Blocking, Listening, Learning, Forwarding
C) Learning, Listening, Forwarding, Disabled, Blocking
D) Listening, Learning, Forwarding, Blocking, Disabled

2. 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

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

A) True
B) False
4. What is the reserved address space for a Class C network?

A) -
B) -
C) -
D) -
E) -

5. What does the trace response N mean?

A) Network unreachable
B) Not forwarded due to ACL restriction
C) Protocol unreachable
D) Port could not be reached

6. Cut Through switching method is best described by which of the following?

A) The entire frame is received before forwarding is commenced
B) Forwards frame after receiving the destination MAC address
C) Filters out collision packets by waiting for the first 64 bytes of data
D) Forwards frame after receiving the source MAC address

Engineer Sales training

1. Correct Answer A
STP switch port states:

Blocking > Listening > Learning > Forwarding > Disabled 

2. Correct Answer A 

Internally multicast is treated as broadcast. So the Switch, will send it to all ports except from the one which it is received, just like a broadcast.

3. 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.

5.  Correct Answer A

Cisco Trace Command Response Codes
Response Meaning
 *         Timed out
 !H       router received packet but did not forward it
 N        network unreachable
 P        protocol unreachable
 U        port unreachable

6. Correct Answer B

Cut-Through switching is also referred to as Fast Forward.

When in cut-through mode the switch waits for the destination MAC Address to be received. Once the MAC Address is known the switch refers to its MAC filter table to determine which port the frame should be forwarded out. The switch forwards the frame even before the entire frame has arrived.

I hope you enjoyed those - more to come..stay tuned....

   Success is a state of mind. If you want success, start thinking of yourself as a success.

― Joyce Brothers