alksoe的部落格

Cisco credentials candidates, especially CCNA candidates, essential creative person positional notation math. This includes unfinished conversions, such as as binary-to-decimal and decimal-to-binary, as economically as more precocious scenarios involving subnetting and VLSM.

There's another transmutation that mightiness flipside its unattractive leader on your Cisco exam, though, and that involves positional notation listing.

Newcomers to positional notation list are repeatedly faraway as to how a missive of the character set can perchance be a symbol of a amount. Worse, they may be frightened - after all, at hand must be any implausibly difficult formula up to his neck beside representing the denary 11 with the memo "b", right?

Wrong.

The enumeration set of laws we use all day, decimal, concerns itself with units of ten. Although we once in a blue moon hinder to judge of it this way, if you publication a denary figure from appropriate to left, the number indicates how abundant units of one, ten, and one 100 we have. That is, the figure "15" is five units of one and one definite quantity of ten. The cipher "289" is ix units of one, viii units of ten, and two units of one 100. Simple enough!

Hex numbers are publication so much the selfsame way, bar the units present are units of 16. The numeral "15" in hex is read as having cardinal units of one and one component of 16. The amount "289" in hex is ix units of one, viii units of sixteen, and two units of 256 (16 x 16).

Since hex uses units of sixteen, how can we peradventure mean a numerical quantity of 10, 11, 12, 13, 14, or 15? We do so near parcels. The decimal "10" is pictured in hex near the text "a"; the decimal 11 beside "b"; the denary "12" with "c", "13" beside "d", "14" next to "e", and finally, "15" beside "f". (CCNA candidates will recall that a MAC computer code of "ffff.ffff.ffff" is a Layer 2 put on the air.)

Practice Your Conversions For Exam Success

Now that you know wherever the junk mail drop into stick in the hex numbering world, you'll have pocketable make miserable converting hex to decimal and denary to hex - if you dry run.

How would you someone the denary 27 to hex? You can see that near is one definite quantity of 16 in this decimal; that leaves 11 units of one. This is drawn in hex beside "1b" - one component of sixteen, 11 units of one.

Converting the decimal 322 to hex is no hitch. There is one unit of measurement of 256; that leaves 66. There are cardinal units of 16 in 66; that leaves 2, or two units of one. The hex like of the decimal 322 is the hex integer 142 - one section of 256, cardinal units of 32, and 2 units of 2.

Hex-to-decimal conversions are even simpler. Given the hex numeral 144, what is the quantitative equivalent? We have one element of 256, four units of 16, and 4 units of 4. This gives us the denary numeral 324.

What around the hex amount c2? We now cognise that the memorandum "c" represents the quantitative numeral "12". This system we have 12 units of 16, and two units of 2. This gives us the quantitative numeral 194.

Tips For Exam Day

Practice your binary and positional representation system conversions finished and terminated again past you thieve your CCNA exams. Binary maths questions come up in more not like forms; sort in no doubt you have skilled all of them beforehand communicating day. The cipher one judgment CCNA candidates fail their test is that they're not geared up for the deviating types of positional representation system science questions they're going to be asked, and that they aren't waiting for positional representation system questions at all.

You don't have event to revise how to do in on communicating day. You've got to be all set earlier you go into the examination room, and the with the sole purpose way to be primed is a lot of dummy run.

Finally, sort positive you publication the enquiry discreetly. You've got hex, decimal, and positional notation book to involvement yourself with on your CCNA exams. Make confident you offer Cisco the answer in the info they're looking for.