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Q: Could someone explain the whole "time to live" thing with pings?
TTL or Time to Live refers to how many routers your packet can go through before it expires. Usually a packet finds its home in less than 32 hops, but 64-128 is a good default.
Q: Then why is the TTL 64 when I ping my host computer but 49 when I ping some other site?
Every time a packet passes through a router the TTL number is one less than before. If this counter didn't exist the internet as we know it could be at 100% bandwidth bouncing these packets back and forth that would never find a home if the destination is unreachable. That would make the internet unusable.

Every computer has its own setting for its packets when it comes to TTL. All that matters is the setting is high enough to allow the packet to reach its destination.
Thanks to BlitzenZeus for these answers.

Feedback received on this FAQ entry:
  • thank you

    2013-02-28 09:50:03

  • well explained

    2012-06-14 08:51:56

  • Thanks a Lot It Was HelpFull

    2011-12-26 08:38:56

  • good and thanks

    2010-10-23 04:40:17

  • great. thanks

    2010-02-13 10:22:49

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