00:04
the next protocol that we're going to cover is point to point protocol
00:10
Pointed point for a call is just a layer to encapsulation type.
00:15
The default encapsulation type on a serial interface is high level data link Clear Control, or HD Elsie.
00:24
each vendors HDL see is proprietary to that vendor. So Cisco's SCLC's proprietary to Sisko
00:32
routers and junipers S. T. L. C. Will be proprietary to juniper.
00:37
So if Juniper and Cisco routers are connected to each other, they won't be able to talk
00:42
P P p or point to point Protocol, on the other hand,
00:46
is an open standard,
00:48
which means using PPP, you could connect a Cisco router to a juniper robber.
00:55
Now PPP provides other benefits that are are on top
01:00
that make it better than H. T. L. C.
01:02
One of those benefits is with Indication
01:07
Authentication is done because if to routers are connected over their cereal links or ran links,
01:14
you cannot always be sure
01:18
the person at the other end of the link is who they say they are.
01:22
Somebody could have unplugged your router at the other end, because these routers don't always sit next to each other and plugged in a malicious device.
01:32
BBP uses authentication to make sure
01:37
that the person at the other end of the link is who he say's years
01:42
or the router. At the other end of the link
01:45
is what it's supposed to be.
01:48
P. P P uses a sub protocol called link Control Protocol that handles the authentication phase off the PPP link establishment.
01:57
PBP can also do compression
02:04
or your I P headers.
02:06
Compression is a process where you take a large chunk of data
02:09
and you take redundant values within that data
02:14
and you set numbers for those values and you turn a large chunk of data into a smaller chunk of data, which is which saves bandwith
02:23
PPP. Also as the PPP multilink feature where you can configure PPP
02:31
Look at multiple side by side physical links as one logical pipe. So, for example, if you have
02:39
three links and two from our
02:43
a megabyte per second apiece, one megabyte per second megabit per second a piece, you can configure PPP to look at these three links as one logical three megabit per second pipe.
02:55
Now, after the link is established,
03:00
so L c p controls the link establishment phase of p P p.
03:04
After that link is established, PPP can negotiate multiple Lear three routed protocols.
03:09
So I p is a route did protocol, not a routing protocol. It is what is carried in routing packets.
03:21
to carry more than just I P. Now, however, that is not needed anymore because other routed protocols like Apple Talk and I P X don't exist anymore. But people he still has the ability to carry different routed protocols.
03:37
That function is controlled by another separate call called Network Control Protocol.
03:43
Now there are several types of network control particle
03:46
on the board here. The only type I've written is Internet Protocol Control Protocol, which enables PPP to carry I p information.
03:54
Since I P is the standard. Nowadays
03:58
we only need Internet control, Internet Protocol Control Protocol or I P C P. But back in the day, they used to be an i p X or Internet packet exchange CP Control Protocol. So Internet Packet exchange control protocol or capital talk control protocol.
04:15
Those don't exist anymore. So the only network control protocol we deal with
04:18
are is I PCP or Internet Internet protocol Control Protocol.
04:26
Now let's go to our lab and see how this works.
