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We'll start off with a quick overview of Wayne Technologies and the various encapsulation that could

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be used across a when.

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And then we're going to look at the features and functionality of both Hdl-c and PGP.

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And as always, I'm going to show you multiple demonstrations of these encapsulation as a when a wide

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area network connects devices separated by large geographical areas.

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So you may have an office in New York, in the U.S. and an office in London, in the United Kingdom.

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And you would use a point to point zero link as an example to provide a dedicated permanent point to

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point connection between those two sites.

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A point to point or serial link, also called a leased line, provides a dedicated connection between

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two sites.

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So it's a point to point connection between the New York office and London office.

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This uses a service provider network to provide the connection from one site to another.

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So unlike Ethernet on the local area network, which is owned by the company, the infrastructure used

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to connect the sites is owned by a provider which could be AT&T in the US or British Telecom or BT in

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the UK, for example.

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The concept here is that devices are far apart from each other.

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So as an example, you could have an office in San Francisco, in Houston, in London and in Tokyo.

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These officers are far apart from each other and it's not possible to use an Ethernet cable such as

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Cat five or six cabling to connect those sites together because they're too far apart.

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So local area connection would be used on premise at the customer site, but then the local area network

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would be connected to the WAN and the encapsulation or layer two technology changes from Ethernet to,

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for instance, Hdl-c or PPTP.

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Now today, a lot of point to point at least lines or serial connections have been replaced by virtual

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private networks or VPNs, where the connection is made across the Internet.

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It's a lot cheaper to set up a VPN across a DSL connection than it is to lease a leased line or use

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a serial .2. connection.

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The reason why it's called a leased line is you are leasing a cable or connection or line between sites.

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So hence the term leased line also called a serial connection, also called a point to point connection.

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So we are no longer talking about LANs or local area networks.

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We are talking about WANs, where we are connecting these sites or offices in different parts of the

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world so that they can communicate with each other.

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A one is often represented as a cloud, connecting multiple sites together.

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The reason for the use of the cloud is that the enterprise is not concerned with what's happening within

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the service provider network that is someone else's domain or someone else's problem.

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The enterprise is simply sending traffic from the San Francisco office to the service provider, and

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somehow it appears in London or in Tokyo as an example.