How does pppoe

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What is PPPoE? Why PPPoE? How PPPoE works? Like 2 Dislike 0 Favorite 0 Share Report. Next: port forwarding issues. The main purpose is to ensure that the correct files have been received from the correct source device or server. Data encryption involves the use of a wide range of characters to relay a message to which only the sending and receiving end are able to understand. By encrypting the data, this helps protect the user and the networks from malicious third-party programs and users.

By compressing the data, the information that is being streamed from one user to another will become "lighter". This means that the transfer of data would become faster and more efficient. Since PPPoE provides encryption and authentication towards a network, most internet service providers ISPs can manipulate and manage several different internet subscription plans.

Additionally, all that ISPs have to do so that they can impose a bandwidth limitation and filter the traffic that goes in and out of the network is to give their customers a username ID and a password. By doing so, they will be able to monitor and identify the customer. PPP supports 3 different types of user authentication protocols that provide various levels of security: [].

Instead of just requesting a password, the network would send a challenge message which consists of a random value to the device. This is quite similar to PAP but has several unique characteristics. This is considered to be a framework used by numerous secure protocols.

The answer is the PPPoE technology. In this way, clients on the Ethernet can be connected to the remote broadband access device. For carriers, it can fully utilize the current architecture of the telecommunication access network and the current dial-up network resources, without requiring major changes in the operations and management modes. For users, they obtain a similar experience to that obtained using the original dial-up Internet access.

The following figure shows the packet encapsulation structure. Indicates a PPPoE packet type. This field is 8 bits long. This field is 16 bits long. A value of 0xffff is reserved for future use and must not be used. Indicates the length of the PPPoE payload. In the discovery stage, the device allocates a session ID to the user.

The LCP negotiation process is as follows:. If the negotiation options received in a Configure-Request packet are supported but some values are not acceptable, the receive end replies with a Configure-NAK packet that carries the expected values of the local device. If negotiation options received in a Configure-Request packet are not supported, the receive end replies with a Configure-Reject packet that carries the unsupported options. After LCP negotiation is complete, the authentication stage starts.

PAP is a two-way handshake protocol that authenticates users based on usernames and passwords. The usernames and passwords are transmitted in cleartext. This mode applies to environments with low network security requirements.

CHAP authentication is a three-way handshake protocol.