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what's the meaning of TTL=64?

what's the meaning of TTL=64?

If I'm sniffing my computer and see some packet with TTL=64, does it means that the packet came from a computer inside my network, or it can be anyone in the WWW ?

Asked by: Guest | Views: 75
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Guest [Entry]

64 is the number of hops that the packet can travel before it is dropped. Hard to reach hosts that are across many hops of the Internet benefit from a larger TTL on packets. In multicast protocols 64 is used to restrict the packet to the same physical region. You may be seeing a multicast protocol.