Time
15 hours 34 minutes
Difficulty
Intermediate
CEU/CPE
16

Video Description

IPv6 Intro Our next lesson introduces the concept of hex decimals which is used for IPv6 or Internet Protocol version 6. You'll learn the numeric-alpha hex decimal nomenclature, how to represent numbers greater than 9, how to correctly write down an 128 bit address and why 8 fields are needed. You'll learn the importance of 4 bits and what they represent, what the rules are to shortening IPv6 addresses, and why this is the standard.

Video Transcription

00:04
The next topic of discussion
00:06
is Internet Protocol version six or I. P v six.
00:11
Ah, lot of people are intimidated by PB six because it is written in hex a decimal.
00:16
If you remember, our hex numbers
00:18
go from one,
00:20
29123456789 and then a through F, which is a B C D E f.
00:28
So instead of saying 10
00:31
the number 10 is represented by an A because it comes right after nine inaccessible, so in hacks. If I were to write them out, you go from one through nine and then, eh
00:44
throughout
00:45
for the number 10. Since it comes right after nine, the number 10 is represented by an A in hex, a decibel.
00:54
Now people are intimidated by PB six, I assure you, it is nothing to be afraid off except for the tedious typing required to type out of lengthy or address.
01:03
And we will simplify it.
01:04
And I B B six address is
01:07
128 bit address, written in eight fields of 16 bits, each separated by a colon.
01:14
What does that mean? Over Let's write down an I P V C six address.
01:18
So 2000
01:19
two
01:22
Cole And let's make this easy on us by picking zero's a lot of zeroes.
01:26
0000
01:29
0000 So eight fields of 16 bits
01:34
each. So I need eight of these fields, which are separated by a colon,
01:38
then call in 000 a
01:44
colon. 0000 colon 0000 So 123456
01:53
colon 0000
01:57
holen.
02:00
Let's see
02:01
01 to be
02:06
So this represents an I P. V six address, and it looks really long and it looks really complicated, but it's it's really not.
02:15
Now
02:15
remember that each hex character
02:19
is four bits,
02:22
so each hex character represents reach. Hex number or letter represents four bits.
02:29
So if each fields have four has four of these characters, you get a total
02:36
of
02:38
16
02:40
minutes.
02:43
If you add up 16 times eight you yet
02:47
128
02:50
this
02:53
now would you have to type or right in this hole
02:57
mess of numbers and letters every time.
03:00
The answer is no.
03:00
There are rules to shortening
03:04
I P v six addresses rules for shortening i p v six addresses. The first rule is leading. Zeros may be omitted so you can leave out the leading zeros
03:22
within a field
03:23
and
03:24
ah, field 2nd 1 says successive. Feels off. All zeros may be represented
03:36
by a double colon, but only once leading zeros maybe omitted and successive fields of all zeros may be represented by a double colon.
03:49
But only once. Let's see what happens to this address I have written down. Once I applied these rules
03:54
becomes a lot easier.
03:57
I have 2002 then I have two successive fields of zeroes here.
04:02
Can I make these
04:04
into a double Colin? Just represent them by a double colon. Of course I can
04:10
Cool it,
04:11
colon.
04:13
So these two fields are taken. Care off now.
04:15
000 A
04:17
leading zeros maybe omitted. These 1st 3 zeros can be considered leading zeros,
04:24
so I can admit them.
04:27
And I can simply say
04:30
then Colin again.
04:32
Now I have four zeros in a row.
04:35
I have three successive fields of zeros. Cannot turn these into a double colon.
04:41
Well, the rules, said successive feels off. All zeros may be represented by a double colon, but only once. And I've already used up a double colon, so I can't use the double Colin again.
04:51
Best second do is
04:54
is this a leading zero? Yes, it is for this one. This a leading zero? Yes, it is. For this zero is this is leading to know. Yes, it is for this zero. This last year was not a leading zero because it does not have a zero to the right off it.
05:06
So the 1st 3 zeros are leading zeros. So I can omit the 1st 3 and right zero on colon
05:14
again for the 1st 3 zeros because they're leading zero
05:18
again. Omit the 1st 3 zeros because they're leading again just to a zero last zero off each of these fields I wrote down here,
05:29
then zero want to be. I can write us one to be after admitting the leading zero.
05:36
I can also shorten this address as
05:42
2002.
05:45
This time I'm gonna use the double Colin hair instead of hair.
05:49
So I'm gonna just omit the 1st 3 leading zeros. Say colon zero.
05:55
Then again, omit the 1st 3 leading zero said colon
06:00
zero.
06:01
Then you admit the 1st 3 leading zero in front of the eh? So Sekula
06:08
a
06:10
then these three fields
06:12
I can represent
06:14
by Double Colon.
06:18
And then the last field. I can see
06:21
one to be after meeting the first leading zero.
06:26
Now, both of these are valid shortenings for this I p v six address.
06:31
Both of these are valid shortenings for this I p v six address.
06:36
Now can I tell where how many fields of zeroes are gonna be
06:42
where these double Coghlan's recite? Well, I have a total of 123456 fields, which means
06:48
these two these this double colon represents two fields of zeros to give me a total of eight fields
06:56
or looking at the bottom 112345 I have five field, which means these two double Collins represent three additional fields of double off successive zeros.
07:09
So both these
07:11
are valid shortenings for this I p v six address. Now
07:15
we have seen how to short and I p v six addresses.
07:19
How about the I P V six sub net mask? Well, I p v six sub net mask works exactly like the I P Fi four sub net Master
07:29
But instead of written out in hacks, thank God it is on Lee represented
07:34
in
07:35
the slash format or the cider notation.
07:39
So let's say that this address has a slash 64 mask, which means the 1st 4 fields 16 plus 16 16 16 or 64 bits
07:48
belong to
07:50
the network.
07:53
If I were to write out the network address and the network and dress just the network address
07:59
in I. P. V six is called the prefix,
08:01
or the sub net Mask is called the Prefix, which equates to the network address because it tells you how many bits in the I P V six address belongs to the network.
08:11
And remember, it works exactly the same as an I. P V four sub net mask.
08:16
This network address would translate to
08:20
2002
08:22
cooling.
08:24
Now I can't use a Colin Colin here
08:26
because if you look at a night PV four address 1 51 01 45.10 And let's say this was a slash 24.
08:35
If I asked you for the network address, what did you do? 1 51 01 45.0 slash 24. You set all the network bits through zero
08:46
in the same way. If I'm going to set all the network bits to zero after a all these four field. 00000000000001 to be field are to be set to zero, then I cannot use the double Colin hair, for it has to be used
09:03
for my host address
09:05
or my host portion off my TV six address.
09:09
So I say, 2002
09:11
Colin zero commit the 1st 3 zeros, the leading zeros again. Zero I omitted the 1st 3 leading zeros
09:22
and Colin A, then Coghlan Coghlan,
09:26
setting the host portion of the I. P. V six address to zero
09:31
slash 60
09:33
four.
09:35
Next, we're going to explore the I P V six
09:39
you I address format.

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