I want to know at which layer is a network cryptor used. What are the features of routers used for encrypted packets?
Encryption can be deployed at almost all layers of the networking stack - some examples to research would include:
- Layer 1/Physical Layer: Optical encryption
- Layer 2/Logical-Link Layer: MACSec, 802.1x, WPA
- Layer 3/Network Layer: IPSEC, L2TP
- Layer 7/Application Layer: TLS
For a router, you would most likely need one that supports IPSEC