Hva betyr TTL?

[V-by]

Når jeg skal pinge noe, kommer det fram:

svar ra.... og til slutt TTL=<ettelleranna>

Hva betyr dette?

har merka at nettet mitt er ustabilt om dagen, og TTl har vel ligget runt 120 hvis jeg ikke husker feil, men nå ligger den på 61....

 

er det noe gæli eller?

[oby]

TTL = Time To Live

[V-by]

og det betyr hva?

[CrZy_T]

Hvor lenge en pakke skal leve

[Millmax]

wikipedia:

Time to live of IP datagrams

In IPv4, time to live (TTL) is an 8-bit field in the Internet Protocol (IP) header. It is the 9th octet of 20. The time to live value can be thought of as an upper bound on the time that an IP datagram can exist in an internet system. The TTL field is set by the sender of the datagram, and reduced by every host on the route to its destination. If the TTL field reaches zero before the datagram arrives at its destination, then the datagram is discarded and an ICMP error datagram ( 11 - Time Exceeded) is sent back to the sender. The purpose of the TTL field is to avoid a situation in which an undeliverable datagram keeps circulating on an internet system, and such a system eventually becoming swamped by such immortal datagrams.

 

In theory, time to live is measured in seconds, although every host that passes the datagram must reduce the TTL by at least one unit. In practice, the TTL field is reduced by one on every hop. To reflect this practice, the field is named hop limit in IPv6.