check host alive

[Andy Shellam (Mailing Lists)]

> Most systems have 64 as default TTL, otherwise you're right. There are two
> "variants" of "Time to live exceeded". One is where the there are more hops
> to the target than the TTL set in the packet. This is known as "Time to live
> exceeded in transit".
>   

Hmmm something rang a bell when you've said 64, however I've just got a 
completely different answer to both of our theories!
On Windows, the TTL is set to 127, on my FreeBSD 6.1 box it's set to 
246, and on Fedora 5 it's 243.

The TTL displayed in the ping output, is this the same TTL as what we're 
both referring to?


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