Difference Between PPP and PPPoE
PPP
- Point to Point Protocol
- TCP/IP by itself cannot be transmitted over a serial link
- Why TCP/IP Cannot be transmitted over a serial link?
The TCP/IP protocol suite was generally designed to provide implementation of the networking stack from the network layer (layer three) and above. The core protocols of TCP/IP operate at layers three and four of the OSI model, corresponding to the Internet layer and Host-to-Host Transport layer of the TCP/IP architectural model.
Since the Internet Protocol assumes certain services will be provided at layer two, there is no way to make it operate directly over a serial line. The most important L2 function that is required at a minimum is some mechanism for framing the IP datagram for transmission—that is, providing the necessary data packaging to let datagrams be transmitted over the physical layer network. Without this, IP datagrams cannot be sent over the link.
- For TCP/IP to work on serial links hence PPP was developed.
- PPP is full-featured data link layer protocol that provides framing
PPPoE
- PPP, which was designed for serial communications, has now been adapted to Ethernet, and is called PPP over Ethernet (PPPoE)
- Service Providers have started using Ethernet links on WAN.
- ISPs now require the added functionality of PPP over Ethernet, which allows them to have session through the use of user logins and have the ability to measure the volume of traffic each user generates.
- PPP helps to creat individual circuits over Ethernet media which is multicast , for each subscriber. Subscriber is a DSL end User.
PPP
- Point to Point Protocol
- TCP/IP by itself cannot be transmitted over a serial link
- Why TCP/IP Cannot be transmitted over a serial link?
The TCP/IP protocol suite was generally designed to provide implementation of the networking stack from the network layer (layer three) and above. The core protocols of TCP/IP operate at layers three and four of the OSI model, corresponding to the Internet layer and Host-to-Host Transport layer of the TCP/IP architectural model.
Since the Internet Protocol assumes certain services will be provided at layer two, there is no way to make it operate directly over a serial line. The most important L2 function that is required at a minimum is some mechanism for framing the IP datagram for transmission—that is, providing the necessary data packaging to let datagrams be transmitted over the physical layer network. Without this, IP datagrams cannot be sent over the link.
- For TCP/IP to work on serial links hence PPP was developed.
- PPP is full-featured data link layer protocol that provides framing
PPPoE
- PPP, which was designed for serial communications, has now been adapted to Ethernet, and is called PPP over Ethernet (PPPoE)
- Service Providers have started using Ethernet links on WAN.
- ISPs now require the added functionality of PPP over Ethernet, which allows them to have session through the use of user logins and have the ability to measure the volume of traffic each user generates.
- PPP helps to creat individual circuits over Ethernet media which is multicast , for each subscriber. Subscriber is a DSL end User.
No comments:
Post a Comment