| 信息技术 |
Commonly used to bridge between incompatible hosts/routers or to provide encryption, a method by which one network protocol encapsulates another protocol within itself (When protocol A encapsulates protocol B, a protocol A header and optional tunneling headers are appended to the original protocol B packet. Protocol A then becomes the data link layer of protocol B. Examples of tunneling protocols include IPSec, Point-to-point Protocol Over Ethernet (PPPoE) and Layer 2 Tunneling Protocol (L2TP)) |
