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Now as I mentioned cyder or classless into domain routing was introduced in 1993 and Sajda replaces
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classful IP addresses.
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This allows us to use a variable length subnet mosques or violists them and uses the notation 10.0 at
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0.0 slash 8 rather than the notation of 10.00 dot 0 2 5 5.0 did 0 0.0.
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So for a Class 8 network such as 10 this type of notation is used and not this notation insider.
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So firstly I'm going to explain the notation of slash 8 and then I'll give you the reasons why the move
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was made to cyder so inside a notation we use slash X mosques.
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So if we had a subnet of 2.5 they're too far to 5.0.
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That converts into 24 binary bits.
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So to work it out convert the decimal octet to binary.
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So in the first octet we have 2.5 which equals eight binary ones in the second octet we have 255 which
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also equals eight binary ones in the third octet.
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We have 2 5:5 which equals a another eight binary ones.
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The last octet is decimal 0.
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So they are no binary ones in the last octet.
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So we've got eight Monnerie ones plus eight binary ones which equals 16 plus an additional eight binary
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ones which equals 24 binary ones in the mosque.
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So once again if you count the binary ones you end up with 24 binary ones and therefore to 5 5.1 5.2
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for 5.0 can be written as a slash 24 because they are 24 binary ones in the subnet mask.
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As another example 4 5 2 5.0 0 Sarah is equivalent to slash 16.
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And why is that.
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Because 2.5 is 8 binary ones and 2.5 is an additional eight binary ones so 8 plus 8 equals 16.
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Hence slash 16 in the mosque.
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So the slash mosque notation is essentially counting the number of binary ones in the mosque.
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Mosques have to be contiguous ones.
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As mentioned previously.
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So this is simply another way of writing the subnet mask flesh 16 is equivalent to 2 5 5 2 4 5 to 0.0.
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Now there are various advantages to using cider and there is a reason why the industry moved to the
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side a notation.
3003
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