Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated:
1
00:00:00,560 --> 00:00:08,230
Ethan at 10 base to use as correction CAPLE The specifications are different to the coaxial cable used
2
00:00:08,230 --> 00:00:10,240
in cable television.
3
00:00:10,270 --> 00:00:18,580
But the point I'm trying to make is coaxial cable running a baseband signal can only transmit or receive
4
00:00:18,610 --> 00:00:21,700
a single signal at any given time.
5
00:00:21,790 --> 00:00:29,020
Broadband uses coaxial cable that allows for multiple signals to be sent across the wire at any given
6
00:00:29,020 --> 00:00:29,810
time.
7
00:00:29,950 --> 00:00:32,310
Ethernet uses baseband signaling.
8
00:00:32,320 --> 00:00:37,010
In other words 10 base two or ten base five in the past.
9
00:00:37,090 --> 00:00:40,200
So in ten based to correction cable was used.
10
00:00:40,450 --> 00:00:47,590
But you can see connectors we use to connect devices to the network a BNC connector would connect the
11
00:00:47,590 --> 00:00:49,360
cable to the PC.
12
00:00:49,540 --> 00:00:51,430
Don't worry too much about this.
13
00:00:51,550 --> 00:00:56,830
This is just a bit of history so that you can understand why things are done in certain ways today.
14
00:00:57,070 --> 00:01:02,560
What's important to realize is that a single piece of cable would have been in-seat connectors which
15
00:01:02,560 --> 00:01:05,710
would allow you to connect devices to a single cable.
16
00:01:05,920 --> 00:01:12,760
Multiple devices were connected across a single cable and at the end you would have Terminators to stop
17
00:01:12,850 --> 00:01:17,750
signals bouncing back and gives an example of a terminator.
18
00:01:17,770 --> 00:01:24,400
So what it terminated did is essentially terminate the signal or destroy the signal when it got to the
19
00:01:24,400 --> 00:01:25,680
end of the wire.
20
00:01:25,720 --> 00:01:30,990
So when the signal is sent across the wire it shouldn't bounce back and cause collisions.
21
00:01:31,000 --> 00:01:36,290
So the Terminator would terminate the signal to ensure that it didn't bounce back.
22
00:01:36,340 --> 00:01:43,300
Once again the reason for doing this is because baseband is used baseband only allows a single signal
23
00:01:43,300 --> 00:01:47,280
to be sent across the wire or cable at any time.
24
00:01:47,410 --> 00:01:53,860
So we couldn't have a signal bouncing back and causing a collision hence terminate as we used.
25
00:01:53,860 --> 00:01:59,020
Now before we continue discussing the transmission of data in more detail let's talk about what a MAC
26
00:01:59,120 --> 00:02:08,200
addresses a Media Access Control address or MAC address also called a physical address is a unique identifier
27
00:02:08,470 --> 00:02:15,070
assigned to network interfaces and MAC addresses a layer to address identifying a network interface
28
00:02:15,070 --> 00:02:16,550
card or MC.
29
00:02:16,660 --> 00:02:19,600
It is typically boltin by the manufacturer.
30
00:02:19,600 --> 00:02:28,360
In other words it's Boente in to the network card Bhave Nic manufacturer and it's 48 bits in length
31
00:02:28,830 --> 00:02:32,070
the 48 bits are divided into two portions.
32
00:02:32,230 --> 00:02:38,100
The UI portion is 24 bits in length and the station address is also 24 bits in length.
33
00:02:38,120 --> 00:02:49,360
The UI organizational unique identifier identifies a vendor such as Cisco or HP or Dell or other vendors
34
00:02:49,630 --> 00:02:54,470
that manufacture network devices or PCs or servers.
35
00:02:54,520 --> 00:02:57,320
Each manufacturer is assigned and why.
36
00:02:57,430 --> 00:03:04,780
And each vendor in turn can create and assign and station addresses to Network Interface Cards the station
37
00:03:04,780 --> 00:03:07,270
addresses should be unique.
38
00:03:07,270 --> 00:03:14,000
Now they should be unique because there have been cases where addresses have been duplicated by manufacturers.
39
00:03:14,140 --> 00:03:19,540
So you may end up having a network with duplicate MAC addresses which causes a lot of problems in an
40
00:03:19,540 --> 00:03:25,680
Ethernet environment in an Ethernet environment on a segment or a piece of cable.
41
00:03:25,690 --> 00:03:29,920
We're assuming that all devices have a unique MAC address.
42
00:03:29,950 --> 00:03:33,900
It's also possible in software to change device MAC addresses.
43
00:03:34,090 --> 00:03:43,230
So my interface card as an example I can go to properties go to configuration selected vaunts I can
44
00:03:43,230 --> 00:03:50,060
then go to a locally administrated addresses and then I can change the valley so I could make it quadruple
45
00:03:50,060 --> 00:03:54,750
a quadruple be quadruple see and click ok.
46
00:03:56,110 --> 00:04:03,790
Opening ACMD prompt and tapping IP config for special and then scrolling up I'll be able to see that
47
00:04:03,790 --> 00:04:12,230
my physical MAC address is now set to a b c I've just changed my MAC address from the phone to in the
48
00:04:12,310 --> 00:04:15,960
address set by the manufacturer to something else.
49
00:04:15,970 --> 00:04:23,080
Now if I did that on multiple PCs or multiple devices I would be causing an issue with duplicate MAC
50
00:04:23,080 --> 00:04:24,230
addresses.
51
00:04:24,250 --> 00:04:28,190
So once again the first portion of a MAC address is the UI.
52
00:04:28,540 --> 00:04:34,050
And the second portion is a unique value assigned by a manufacturer.
53
00:04:34,090 --> 00:04:40,070
So on my network card I'll set it back to the default.
54
00:04:40,110 --> 00:04:47,610
So now when I run IP config less you'll notice the built in MAC address on my local area connection
55
00:04:48,000 --> 00:04:52,520
uses the unique value assigned by the manufacturer.
56
00:04:52,620 --> 00:04:54,770
Why Asharq has a nice tool to look at.
57
00:04:54,780 --> 00:04:56,210
Oh you like coats.
58
00:04:56,370 --> 00:05:03,610
So I've just added the 0 0 0 1 E6 and that should list the manufacturer for that MAC address.
59
00:05:03,720 --> 00:05:11,850
In this case you can see it's HP some MAC addresses that start with triple 0 1 6 hp MAC addresses.
60
00:05:11,880 --> 00:05:16,410
I can also look on the dribbly Web site to see similar information.
61
00:05:16,410 --> 00:05:21,930
Notice that both E-6 and IE 7 codes are manufactured by HP.
62
00:05:21,930 --> 00:05:29,190
There's a long list of different codes and you'll be able to see which codes are associated with which
63
00:05:29,280 --> 00:05:29,720
vendor.
6791
Can't find what you're looking for?
Get subtitles in any language from opensubtitles.com, and translate them here.