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TTL value is set by the sender inside his IP packet ( the person using the system, or sending the packet, is unaware of these things going on under the hood, but is automatically handled by the operating system ). If there was no TTL in an IP packet, the packet will flow endlessly from one router to another and on and on forever searching for the destination. Hops are nothing but the computers, routers, or any devices that comes in between the source and the destination. Its the maximum number of hops that a packet can travel through across the internet, before its discarded. TTL is not measured by the no of seconds but the no of hops. Although its called as Time To Live, its not actually the time in seconds, but its something else. We will also look at different switches available to traceroute command in Linux.Įach IP packet that you send on the internet has got a field called as TTL. In this article I will explain the working of traceroute and types of traceroute tools along with their differences.
Linux packet sender example how to#
How to use a command can always be found out online or even inside the Linux man and info pages. But its the concept behind a tool that will always give you an insight into the problem. Because its not the usage that helps you understand and troubleshoot an issue. Its a tool that can be used to very the path that your data will take to reach its destination, without actually sending your data.Īs I always say in my articles, its always good to understand how a particular tool works. Network Latency or more specifically the time taken to send and receive data to each devices on the path Names and identity of routers and devices in your path The entire path that a packet travels through These objectives fulfilled by tracroute gives an insight to your network problem. There are three main primary objectives of traceroute tool. Its basically a network diagnostic tool that is very handy. Network administrators and system administrators use this tool most commonly in their day to day activities. Its a very handy tool available in most of the operating systems by default. If you are working as a network administrator, system administrator, or in any system operations team, then you might have already heard about the tool named TRACEROUTE.