Questions on CCNA Exam and....... 1

[mccartha]

WARNING: I was asked to convert binary to both IP address and also Hexadecimal. Are you allowed to use a calculator on the exam?

 

[moetech]

No calculators are allowed, but you do get paper and pencil to write down notes.

 

[rburke]

Do you know the exact question? We can help you break it down if you would like.... Let us know....

burke

 

[dogbert2]

Ayup, that's the rules, you CAN'T bring in any notes,
calculators, aids, etc into the testing room. They
will supply you with paper and pencil for notes and
figuring things out. The only thing you can take
into the room is yourself (some places even ask you
to turn in things like pagers and cell phones during
the test).

If you are having trouble subnetting or doing
conversions, I would recommend knowing this stuff
well before even attempting the CCNA exam (or any
exam for that matter). Trying to figure out how
to do it during the exam will be a test killer for
sure.

-Bill

 

[mccartha]

Ok the question read:

Provide the IP and hexadecimal equivalent of 10101010.

IP = 170 and Hex = AA right??????

How do you calculate the Hex w/o a calculator?

 

[rburke]

Actually Hex is pretty easy to calculate from binary w/o a calculator. Every 4 bits of binary is equal to one hex digit, since 1111 is 15, then that is why Hex has F=15. Basically, just break up the binary number into groups of 4, then figure out what that one group of 4 is in Hex seperately, and then combine to get the Hex number.

EX.
10110000
IP:
128+32+16=176
The answer for IP is 176.

Hex:
1011=8+2+1=B; 0000=0
The answer for Hex is B0.

It is pretty easy to remember the Hex table and values, just memorize:

0000=0
0001=1
0010=2
0011=3
0100=4
0101=5
0110=6
0111=7
1000=8
1001=9
1010=10=A
1011=11=B
1100=12=C
1101=13=D
1110=14=E
1111=15=F

Let me know if this helped or if I need to clarify better...

burke

 

[Guest_imported]

Which cert was this for? the CCNA exam?

 

[techkiwi]

Working with hex, decimal and binary is something I find relatively easy as I started to program computers 20 years ago and lived, slept and breathed this stuff as a teenager. If you're not this lucky (some would say weird!), practice. Helps a lot when dealing with subnets and masks, and having a good grip on it can help you avoid getting tripped up on the "trick" questions or when converting from decimal to binary in order to work out the number of hosts and networks and then back to decimal again.

As rburke says, it is pretty easy to work out ONCE YOU KNOW IT WELL! Practice if you don't.