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 CCNA interview questions  CCNA Interview Questions
 CCDA interview questions  CCDA Interview Questions
Question
what is the binary value of loop back address
 Question Submitted By :: Jitendera Kumar Sinha
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is the binary value of loop back address
Answer
# 1
As we everybody know.. Loop back address is 

127.0.0.0 (Entire network address)

Here - 
  
First Octate - 127 

Second Octate - 0         

Third Octate - 0        

Forth Octate - 0 

Convert those in binary - Using (128 64 32 16 8 4 2 1) code....

First Octate - 0 1 1 1 1 1 1 1
Second Octate - 0 0 0 0 0 0 0 0 
Thirde Octate - 0 0 0 0 0 0 0 0
Fourth Octate - 0 0 0 0 0 0 0 0

So binary add of loopback address - 

 01111111 00000000 00000000 00000000

Note: 

0 : Zero designate the corresponding decimal code value zero.

1 : One designate the corresponding decimal code value that
decimal number.
 
Is This Answer Correct ?    3 Yes 2 No
Shahin
 
  Re: what is the binary value of loop back address
Answer
# 2
hi sahain i mark this one wrong becoz this value was not in 
the option
there are numric value and i also donot remamer that value
 
Is This Answer Correct ?    0 Yes 0 No
Jienderas Snha
 
 
 
  Re: what is the binary value of loop back address
Answer
# 3
Hi.. J... R u serious??? Is it a wrong one..???
 
Is This Answer Correct ?    1 Yes 0 No
Shahin
 
  Re: what is the binary value of loop back address
Answer
# 4
no sahin it is not wrong it is correct but that value is 
not given in to the option
so i marked it wrong

i think iot may be 7 

explantion
scince loopback is 127.0.0.1
so in that frst bit is always off
remanig 7
thus aqll bit are on thus the nuric value of lopback 
address might be 7

but but but i am not dam sure this time i am also confused 
not little bit much more.so do not get it that it is wright
i am 30%sure that it migh be
 
Is This Answer Correct ?    0 Yes 0 No
Jitendera Kumar
 
  Re: what is the binary value of loop back address
Answer
# 5
How cud u say binary value of 1st octate, coz we know IP
address consist of four octate, each of 8 bits.

    XXXXXXXX.XXXXXXXX.XXXXXXXX.XXXXXXXX

I don't think it wud be a justified answer if we say "7".
coz he is nt asking the binary bit of first octate. so we hv
to take or assume the conventional 4 octate criteria.

Hi.. Jitendera, this may open up some more question.
heheheheh..!!!!
 
Is This Answer Correct ?    0 Yes 0 No
Shahin
 
  Re: what is the binary value of loop back address
Answer
# 6
actualr sahin
my argue based on that consept
that is loop back address is 127.0.0.1
let consider its wild mask that is
0.255.255.255
that is match exct value of 1st octaet and three octet may 
have  value 
try to ping 127.4.5.6
u will get reply through 127.0.0.1
ok that is 127 n/w bit is resved for the nic card 
functionaly staus and we refred as it loop back address
now 
scinselast three octet have any value then we are not aware 
of that
scine first octet is fix for n/w id 127
then
from our most convanonal rule
128 64 32 16 8 4 2 1 
0    1  1  1 1  1 1 1=127 that is 7 bit
scince that was in option so i mark it

i know u r corect but that option are not present in answer 
sheet
and i am not bale to write that opton on answer sheet and 
then mark
ha a ha haaaa
so i apply my wrong/wright consept and mark 7
i donot know it was wright or not so i placed it on all 
interview .com
 
Is This Answer Correct ?    0 Yes 0 No
Jitendera Kumar Sinha
 
  Re: what is the binary value of loop back address
Answer
# 7
jeetu kaha se uthaye h ye sare questions tune???

n yeah guys 1 more query
0.xxx.xxx.xxx ye ips kya use hote h if yes then in which
scenario????
 
Is This Answer Correct ?    0 Yes 0 No
Nikhil Maggu
 
  Re: what is the binary value of loop back address
Answer
# 8
OK got the same
0.0.0.0 is used for default routing

but can we use sumthing like "0.0.0.xxx", in any
parctice????????
 
Is This Answer Correct ?    0 Yes 0 No
Nikhil Maggu
 
  Re: what is the binary value of loop back address
Answer
# 9
han bhia nikhil
actualy if you use 0.0.0.xxx(1 to 255) then it will act as 
wild mask bit 
and you can use it
1 ospf routing protocol
2 access list
 
Is This Answer Correct ?    0 Yes 0 No
Jitu
 
  Re: what is the binary value of loop back address
Answer
# 10
127.0.0.1 Address is used to check the TCP/IP protocol
stack..!!! Not particularly NIC card..!!!!
 
Is This Answer Correct ?    0 Yes 0 No
Shahin
 
  Re: what is the binary value of loop back address
Answer
# 11
Hi Jitendera, for ur concern, next time write the complete
question. Heheheh

If the option were written in question thn specify it in
posting yaar..!!! 

According ur option u r right. 

Don't mind..!!! C ya..!! Keep posting..!!
 
Is This Answer Correct ?    0 Yes 0 No
Shahin
 

 
 
 
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