Re: What is the differents between Switch and Router?

[Garrett Wollman]

<<On Sat, 17 Mar 2001 22:03:53 +0100, Harald Alvestrand <[EMAIL PROTECTED]> said:

> That's my reason to use the TTL decrement; if someone shows me a device 
> where a packet comes in on one interface with a certain TTL, and it comes 
> out on another interface with a lower TTL but no other significant changes, 
> I call it a router.

Except that I can now show you a ``stealth router'' -- a device which
acts in all respects like a router, except that it does not decrement
the TTL field or generate ICMP Time Exceeded messages.  (Typically
this is done to interpose a packet-filtering router without making it
visible to remote attackers.)

-GAWollman