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I need some help on figuring this out: 1.Did you know you can even...

I need some help on figuring this out:


1.    Did you know you can even have odd subnets like /127, /126, /125, /123, etc..?

It may seem intimidating but it's actually pretty simple.

Let's take this example IP: 2001:EF01:2345::FFFF

Next, let's take the last hextet from that IP: FFFF

Lastly, let's take out the last nibble from that hextet: F


In decimal format, what number does F represent?           _____15______________________________


How many binary digits do you need to represent that number? ______4 digits ___________________


How many numbers are between /128 and /124? __________________16___________________


Piece it together yet? If not, let's break it down this way.

CIDR

End of Range

Binary Representation

/128

::

0000

/127

::1

0001

/126

::3

0011

/125

::7

0111

/124

::F

1111

Now it your turn.... try and finish these ranges.

CIDR

End of Range

CIDR

End of Range

/123

::1F

/76

::F:FFFF:FFFF:FFFF

/122

::3F

/75

::1F:FFFF:FFFF:FFFF

/121

/74

/120

/73

/119

/44

/118

/43

/117

/42

/116

/41

/115

/19

/114

/18

/113

/17

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