Data-Link Layer network

Data-Link Layer

Data-link layer (L2) encryption can be implemented in devices other than the router on switched links where security is a concern. Because this method encrypts the network layer header, as well as the data, traffic must be decrypted before entering the next router. The concern would be if traffic had to pass through many routers, the decryption and reencryption would need to be repeated each time, leading to latency issues. Another concern involves trust because the data passes through these routers as Cleartext.