!!! Overview
[{$pagename}] ([PPP])  is a [Data-link Layer] [OSI-Model] [communications] [protocol] used to establish a direct connection between two [nodes]. 

[{$pagename}] connects two routers directly without any other networking device in between. 


[{$pagename}] can provide connection [authentication], transmission [encryption], and compression.

[{$pagename}] is used over many types of physical [networks] including serial cable, phone line, trunk line, [Mobile Network] telephone, specialized radio links, and fiber optic links such as [SONET]. 

[Internet Service Providers] ([ISPs]) have used [PPP] for customer dial-up access to the [Internet], since [IP] packets cannot be transmitted over a modem line on their own, without some [Data-link Layer].

Two derivatives of [{$pagename}], [Point-to-Point Protocol over Ethernet] ([PPPoE]) and [Point-to-Point Protocol over ATM] ([PPPoA]), are used most commonly by [Internet Service Providers] ([ISPs]) to establish a [Digital Subscriber Line] ([DSL]) Internet service connection with customers.

!! More Information
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* [#1] - [Point-to-Point_Protocol|Wikipedia:Point-to-Point_Protocol|target='_blank'] - based on information obtained 2018-03-23-