3
I am curious: how big is the overhead SSH
introduces compared to telnet
?
Obviously there are different parts here:
- Initial connection time overhead due to additional round trips for encryption
- Is there a bandwidth overhead?
- Is there an overhead in each packet transmitted
- or do we only have some padding at the end?
- CPU overhead on the client side
- CPU overhead on the server side
- How large is it?
- How about newer CPUs which have AES modules?
- And what about servers with dozens or hundreds of SSH connections?
- is the per-connection CPU overhead of clients and servers symmetric?
- Is there a memory overhead?
- Did I forgot something?
This is more of a theoretical question. I am fully aware that it makes practically no difference in typical scenarios where a server maintains only a few ssh connections.
I’m VTC as “too broad” because I don’t think an answer would fit in this site concept (or answer text limit :D ). – Daniel B – 2016-08-03T08:49:36.117