高级数据链路控制(HDLC)和点对点协议(PPP)的主要区别在于高级数据链路控制是面向比特的协议，另一方面，点对点协议是面向比特的协议。面向字节的协议。
HDLC和PPP的另一个区别是HDLC是通过点对点配置实现的，另一方面也是多点配置，而PPP仅通过点对点配置实现。
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让我们看看 HDLC 和 PPP 之间的区别：
| S.NO | HDLC | PPP |
|---|---|---|
| 1. | HDLC stands for High-level Data Link Control. | PPP stands for Point-to-Point Protocol. |
| 2. | HDLC is a bit oriented protocol. | PPP is a byte oriented protocol. |
| 3. | HDLC is implemented by Point-to-point configuration and also multi-point configurations. | PPP is implemented by Point-to-Point configuration only. |
| 4. | Dynamic addressing is not offered by HDLC. | While in this Dynamic addressing is offered. |
| 5. | HDLC is used in synchronous media. | PPP is used in synchronous media as well as asynchronous media. |
| 6. | HDLC is not compatible with non-Cisco devices. | PPP is compatible with non-Cisco devices. |
| 7. | HDLC does not provide link authentication. | While PPP provide link authentication using various protocols. |
| 8. | HDLC is more costly comparatively. | While PPP is comparatively less costly. |