I want to know at which layer is a network cryptor used. What are the features of routers used for encrypted packets?

  • 1
    Can you be more specific? There are many types of encryptors and they work at different layers. Routers commonly use IPSec tunnels to encrypt traffic.
    – Ron Trunk
    Nov 23, 2016 at 15:03
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    – Ron Maupin
    Aug 15, 2017 at 4:34

1 Answer 1


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

  • Worth adding - MACSEC is becoming more common on routers (ex: Cisco ASR, newer Arista gear) and is a nice way to do hop-by-hop encryption.
    – rnxrx
    Nov 27, 2016 at 23:48

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