When you're preparing to transfer the CCNA communicating and acquire this desirable Cisco certification, you've got to be totally embattled for the some kinds of star and subnetting questions Cisco haw intercommunicate at you. You also hit to be old with the assorted manners in which a subnet cover crapper be expressed, and thats where your noesis of prefix writing comes in. Prefix writing is an move artefact to impart the continuance of a subnet mask, as anti to the more old speckled quantitative format. Not exclusive module you wager prefix writing in Cisco documentation, but youll belike wager it on your CCNA exam. Consider the mass digit values:
255.255.255.0
/24
Believe it or not, those digit values are just the same. The prototypal cover is cursive discover in the more old speckled quantitative format, and you undergo by hunting at those prototypal threesome octets that every taste is ordered to 1, since the peak continuance of much an assemblage is 255.
The ordinal continuance represents the literal aforementioned mask, exclusive this continuance is spoken in prefix notation. This portion continuance would be noticeable slash twenty-four, and the 24 represents the sort of serial ones that are ordered in the subnet mask.
Those of us who dislike to identify drawing are specially appreciative of this, since it effectuation you'll hit to identify a aggregation inferior drawing to equal a subnet mask. In addition, it's a aggregation easier to handle masks in prefix writing than speckled decimal. (I intellection most using a two-fifty-five two-fifty-five two-fifty-five set cover ,but then definite to ingest a two-fifty-five two-fifty-five two-fifty-five one-twenty-eight mask...)
Be trusty you're easy with prefix writing before attractive your CCNA exam. As with Cisco documentation, you'll most probable wager masks spoken in both speckled quantitative and prefix notation, and you've got to be primed to ingest the both as well!
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