Small Doubt

[krishnan.vadrevu]

Dear Sir

While im reading IP Teminology i found that

"A Byte is 7 or 8 bits, depending on whether parity is used"

What is the meaning of parity?

where it is used?


Thanks and Regards
Krishnan

[Fuzz]

Parity is a very basic error checker. It is one bit in length, and is used to show if a byte is odd or even. If you have even parity, then if the first 7 bits are even, the parity bit is 1, else the bit is 0. So if a bit gets changed somewhere in the byte, it's parity will change, hence there will be a mismatch with the parity bit. Of course, if 2 bits are changed the parity bit will still be correct, so it is only very basic error detection.

Considering you are new to networking, I would suggest some foundation reading on networking before attempting the CCNA exam. Comptia Network+ is an excellent start to get you familiar with all the terms a student of CCNA should know. It should provide you with a more solid base with which to build your Cisco skills on.

[krishnan.vadrevu]

Hi Mr Fuzz

I wanted to know where can i get Comptia Network+ and can u tel me the author name for that book

[Fuzz]

Here's the Comptia website, specifically for Network+

http://certification.comptia.org/network/default.aspx

There are plenty of books written for the exam, have a look on Amazon. Sybex do a good study guide, and Todd has written many himself. The exam code is N10-004.

[lammle]

http://www.amazon.com/CompTIA-Network-Study-Guide-N10-004/dp/0470427477/ref=sr_1_1?ie=UTF8&s=books&qid=1240172310&sr=1-1


:)