Monday, August 26, 2013

Hi Bulldogs!

Time for a new CCNA and CCENT practice exam!

With a little over 30 days to go to the Sept. 30 CCNA deadline, there's a lot of anxiety out there.

Get rid of that anxiety with this free 4-minute video, tackle the practice exam, and then let's get back to work on beating that deadline!

Today's practice exam is a mixed bag, just like the real thing.  Let's get to work!

Question 1:  

Convert the hex value a7d to decimal.

Question 2:

Put these in order of their numeric value, from lowest to highest.

A.  STP port cost of a FastEthernet port

B.  Interval between Hello BPDUs transmissions by the root bridge

C.  STP's "Forward Delay" 

D.  STP's "Max Age"

E.  Default OSPF interface priority

Question 3:  

Two switches are connected via two crossover cables.  Of the four ports involved in those two connections, how many will STP block in order to prevent switching loops?

4.   Convert the binary string 00111101 to decimal.

The answers right after this!

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Here are the answers!

1.  The hex value of a7d breaks down to...

10 units of 256 = 2560

7 units of 16 = 112

13 units of 1 = 13

Add 'em up and you get 2685!

2.  From lowest to highest...

(E)  Default OSPF interface priority = 1

(B)  Seconds between Hello BPDUs = 2 

(C)  STP Forward Delay = 15

(A)  STP FastEthernet port cost = 19

(D)  STP Forward Delay = 20

3.  In that scenario, only one of the ports will be put into blocking mode.  The other three will be forwarding.

4.   The bits set to 1:  32, 16, 8, 4, 1.  Add 'em up and you get 61!

See you again Wednesday with another new exam, and anytime you're ready on YouTube and Udemy!

Chris B.

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