In this article, we’ll be discussing HDLC & PPP data link protocols and the differences between them.
HDLC and PPP protocols are the communication protocol responsible for transmitting information between nodes or points. It deals data in form of frames.
Both HDLC and PPP are the part of data link layer. The major difference between them is, HDLC refers to bit-oriented protocol, whereas, PPP is byte-oriented protocol.
HDLC | PPP |
---|---|
It stands for High-level Data Link Control protocol | It stands for Point-To-Point protocol |
It is a Bit-oriented protocol | It is a Byte-oriented protocol |
The HDLC protocol is only used for the synchronous media | The PPP protocol is used for both the asynchronous media as well as synchronous media |
It is an older protocol as compared to PPP protocol so it does not provide any kind of authentication | It is the newer protocol as compared to HDLC protocol which means that it does provide the authentication. |
In this, the addressing is not dynamic which means that the addressing is purely static. | In this, the addressing is dynamic which makes it quite reliable than HDLC protocol. |
As the HDLC protocol is a quite old school which purely signifies that it does not support non-cisco devices at all. | The PPP protocol is relatively newer than the HDLC protocol which signifies that it does support the non-cisco devices. |
It is more costlier than PPP | It is less costlier than HDLC |
HDLC stands for High-level Data Link Control. HDLC is a type of WAN protocol which necessarily performs the encapsulation of data inside the data link layer. This is the type of encapsulation which changes the format of data and information.
Furthermore,it is used to exchange data between nodes. It transmits data in the form of frames over a network.
It allows the use of point to point and multipoint links. It provides two types of transfer modes that is:
It generally supports three types of frames:
It consists 6 types of fields:
PPP stands for Point-To-Point protocol. PPP is also a type of WAN protocol, which comes up with loads of advancements over the HDLC protocol. PPP protocol does not need any physical addresses or any tangible wires, only the IP address is sufficient.
It defines format of frames, connection establishment, data exchange process, Authentication process and more. However, it doesn’t support flow control, addressing mechanism and efficient error control
This post was last modified on September 20, 2022