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What does TTL mean in ping results?
Time to live (TTL) or hop limit is a mechanism which limits the lifespan or lifetime of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data. Once the prescribed event count or timespan has elapsed, data is discarded or revalidated.
What is TTL 64 in ping?
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.
What is TTL in ping high or low good?
TTL means “time to live”. It is a value on an ICMP packet that prevents that packet from propagating back and forth between hosts ad infinitum. Each router that touches the packet decrements the TTL. If the TTL ever reaches zero, the packet is discarded.
What is a normal TTL?
How does time-to-live work? Administrators can set TTL to any value between 1 and 255. However, different operating systems support setting different defaults. When a packet is by a router, the router subtracts 1 from the TTL count. Then, the packet travels to the next destination on the network.
What does TTL mean in CMD?
time to live
TTL means “time to live”. It is a value on an ICMP packet that prevents that packet from propagating back and forth between hosts ad infinitum. Each router that touches the packet decrements the TTL. If the TTL ever reaches zero, the packet is discarded.
What is normal TTL?
How to interpret the TTL in a ping?
Some devices use 255, while others use 63. So, one of the devices you are pinging sends the reply with the TTL set to 255. By the time it gets back to you, it has decremented to 239. That’s 16 hops. The other device you ping sets the TTL to 63. So when it gets to you, the value is 47. 255-239=63-47=16.
What does TTL mean on an IP packet?
However, with IP packets, TTL refers to the maximum number of “hops” a packet can take on it’s way to the requested host. Each gateway on the network that processes the packet reduces the TTL value by 1. Once the TTL has been decremented to 0, the link that terminates the connection (usually) sends an ICMP TIME_EXCEEDEDresponse.
How to read and understand the Ping results?
Ping Results Explained: 1 Reply from: By default, windows will send four ping messages (one on each line) and then shows you the outcome of each of the four messages. 2 Bytes: Each ping message request is 32 bytes in size. 3 Time: This shows the round trip amount of time in milliseconds (8ms = 0.008seconds).
What’s the TTL value for a Linux machine?
For example, if you ping a Linux machine, its originating TTL value is 64. Depending on how many networks it crosses to get back to you, the TTL is deducted by a value of 1. So if you ping 8.8.8.8, which is Googles nameserver, it has an originating value of 128. By the time it gets back to you, it may have a value of 121 (it does for me).