1

A VPN tunnel is end to end encrypted. But does it gurantee to provide features other than encryption, such as low latency, low jitter etc?

  • Not all VPN tunnels are encrypted. Some of my clients use VPN tunneling just to deal with addressing. I understand that British Telecoms ADSL structure uses L2TP just for addressing. kitz.co.uk/adsl/equip2.htm – jonathanjo Jan 15 at 17:34
4

Tunnels change the network topology. They let routers A and B be logically adjacent even if they don’t have a physical connection. They also let you run one type of network over another type of network.

Example uses:

  1. Run IPv6 network over IPv4-only infrastructure.
  2. Connect “internal security zone” networks over “external” routers.
  3. Logically connect slave devices (such as access points) to a controller.

A VPN tunnel is a tunnel with encryption. So it has all the features of a tunnel while adding data secrecy.

Low latency and low jitter are not on the tunnel or VPN tunnel feature list. The act of encapsulating /encrypting /decrypting may increase latency and jitter. The encrypted traffic may also cause QOS flags in the original traffic to not be visible to the underlying network infrastructure.

|improve this answer|||||
  • The "external" network (e.g. Internet) might not even care about your QoS scheme & flags at all. – Zac67 Jan 15 at 7:22
0

No guarantees of low latency or jitter unless that is provided by the underlay or transport network.

|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.