Trace Network Routes
Traceroute shows the path that packets take to reach a destination, revealing each network router (hop) along the way, response times, and geographic locations.
About Traceroute
Traceroute is a network diagnostic tool that maps the journey taken by packets of information across the internet. It shows the sequence of routers (hops) packets travel through to reach a destination, helping diagnose network problems and understand internet routing.
How Traceroute Works
Traceroute sends packets with incrementally increasing TTL (Time To Live) values:
- First packet has TTL of 1, causing it to expire at the first router
- The router sends back an ICMP "time exceeded" message
- Next packet has TTL of 2, reaching the second router
- Process continues until destination is reached
This method reveals each router in the path and measures response times, giving insight into network performance and routing.
Common Uses for Traceroute
- Troubleshooting network connectivity issues
- Identifying slow network segments
- Verifying routing configurations
- Detecting network changes or outages
- Understanding ISP routing paths