1 00:00:01,050 --> 00:00:07,380 We'll start off with a quick overview of Wayne technologies and the various encapsulation that could 2 00:00:07,380 --> 00:00:09,330 be used across a when. 3 00:00:09,600 --> 00:00:15,600 And then we're going to look at the features and functionality of both HDFC and PDP. 4 00:00:15,690 --> 00:00:23,820 And as always I'm going to show you multiple demonstrations of these encapsulation as a when or wide 5 00:00:23,820 --> 00:00:31,060 area network connects devices separated by large geographical areas so you may have an office in New 6 00:00:31,060 --> 00:00:35,960 York in the US and an office in London in the United Kingdom. 7 00:00:36,190 --> 00:00:42,760 And you would use a point to point a serial link as an example to provide a dedicated permanent point 8 00:00:42,760 --> 00:00:50,690 to point connection between those two sites a point to point or serial link also called a leased line 9 00:00:51,110 --> 00:00:55,170 provides a dedicated connection between two sites. 10 00:00:55,310 --> 00:01:00,790 So it's a point to point connection between the New York office and London office. 11 00:01:00,860 --> 00:01:06,510 This uses a service provider network to provide the connection from one site to another. 12 00:01:06,560 --> 00:01:14,240 So unlike Ethernet on the local area network which is owned by the company the infrastructure used to 13 00:01:14,240 --> 00:01:22,520 connect these sites is owned by a provider which could be AT&T in the US or British Telecom or Beatty 14 00:01:22,520 --> 00:01:30,000 in the UK for example the concept here is that devices are far apart from each other. 15 00:01:30,130 --> 00:01:38,430 So as an example you could have an office in San Francisco in Houston in London and in Tokyo these offices 16 00:01:38,460 --> 00:01:45,150 are far apart from each other and it's not possible to use an infinite cable such as cat 5 or CAT 6 17 00:01:45,150 --> 00:01:51,390 cabling to connect those sites together because they're too far apart so local area connection would 18 00:01:51,390 --> 00:01:57,990 be used on premise at the customer's site but then the local area network would be connected to the 19 00:01:57,990 --> 00:02:07,230 when and the encapsulation or layer to technology changes from Ethernet to for instance HDFC or BPP 20 00:02:08,330 --> 00:02:08,620 now. 21 00:02:08,620 --> 00:02:16,070 Today a lot of point to point at least lines or serial connections have been replaced by virtual private 22 00:02:16,070 --> 00:02:20,780 networks or VPN ones where the connection is made across the Internet. 23 00:02:20,870 --> 00:02:29,780 It's a lot cheaper to set up a VPN across a DSL connection than it is to lease a leased line or use 24 00:02:29,780 --> 00:02:32,470 a serial point to point connection. 25 00:02:32,500 --> 00:02:41,570 The reason why it's called a least a line is you are leasing a cable or connection or line between sites. 26 00:02:41,770 --> 00:02:48,790 So hence the term leased line also called a serial connection also called a point to point connection. 27 00:02:49,450 --> 00:02:55,750 So we are no longer talking about lands or local area networks we're talking about ones where we connecting 28 00:02:55,750 --> 00:03:02,010 these sites or offices in different parts of the world so that they can communicate with each other. 29 00:03:02,160 --> 00:03:07,060 A When is often represented as a cloud connecting multiple sites together. 30 00:03:07,060 --> 00:03:13,510 The reason for the use of the cloud is that the enterprise is not concerned with what's happening within 31 00:03:13,540 --> 00:03:15,370 the service provider network. 32 00:03:15,580 --> 00:03:18,970 That is someone else's domain or someone else's problem. 33 00:03:19,090 --> 00:03:26,260 The Enterprise is simply sending traffic from the San Francisco office to the service provider and somehow 34 00:03:26,320 --> 00:03:30,010 it appears in London or in Tokyo as an example.