Cisco ccna qualification examination tutorial prefix notation

Cisco CCNA Accreditation Exam Tutorial: Prefix Notation

When you're preparing to pass the CCNA examination and earn this desired Cisco qualification, you have actually reached be completely prepared for the many type of binary and subnetting inquiries Cisco may throw at you. You likewise have to know with the various manners in which a subnet mask can be shared, as in the following:

255.255.255.0

/ 24

Believe it or otherwise, those 2 worths are exactly the exact same. The first mask is written out in the more acquainted populated decimal format, and you understand by taking a look at those first 3 octets that every bit is readied to "1", given that the maximum value of such an octet is 255.

The 2nd worth represents the exact very same mask, just this worth is Daniel Cullen expressed in prefix notation. This certain value would be obvious "reduce twenty-four", and the 24 represents the variety of successive ones that are set in the subnet mask.

Those of us that despise to kind numbers are especially satisfied of this, since it suggests you'll need to kind a great deal much less numbers to stand for a subnet mask. Additionally, it's a whole lot easier to discuss masks in prefix symbols than dotted decimal. ("I considered making use of a two-fifty-five two-fifty-five two-fifty-five absolutely no mask, yet after that decided to make use of a two-fifty-five two-fifty-five two-fifty-five one-twenty-eight mask ...")

Be sure you fit with prefix symbols before taking your CCNA exam. As with Cisco documentation, you'll more than likely see masks expressed in both dotted decimal and prefix notation, and you've reached be ready to make use of the both too!