What is X11, and why does it now appear when I launch a window in Terminal?

I just upgraded to Leopard from Tiger. I use Terminal to log-in via SSH to my website etc. What is this X11 thing that launches now every time I try to connect via SSH? I never saw this before in Tiger...

Stephen,
From the terminal do:
*mkdir -p ~/.ssh*
*vi ~/.ssh/config*
In that file put
<pre>
Host *
Protocol 2
ForwardX11 no
ForwardAgent no
UseRsh no
FallBackToRsh no
</pre>
This defensive ssh client configuration (*man ssh_config* if you want to learn more) says that I will connect using only SSH v2 (recommended), I will not forward an X11 session or my SSH agent. I will not use RSH under any circumstances.
Of course command line options override the config all the time.

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Follow us on Twitter www.twitter.com/vzwsupport

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Hi,
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What is X11, and why does it now appear when I launch a window in Terminal?

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