Traceroute

Traceroute maps the path to a destination by sending packets with increasing TTL values. Each router that decrements the TTL to zero returns an ICMP time-exceeded message, revealing its address and the time taken to reach it.

Why it matters

When a site is slow or unreachable, traceroute shows where along the path latency jumps or replies stop, and which network operator owns that hop. This helps you decide whether the fault is in your LAN, your ISP or the destination. Windows uses tracert; Linux and macOS use traceroute, and mtr combines it with continuous ping.

Example

$ traceroute example.com
 1  192.168.1.1     1.1 ms
 2  10.8.0.1        7.9 ms
 3  * * *
 4  198.51.100.22  41.5 ms
 5  203.0.113.10   42.0 ms

Hop 3 shows asterisks because that router did not reply to probes, yet traffic still passed through it.

Common mistakes

• Panicking over a single hop with high latency or asterisks when later hops are fine. Routers often deprioritize probe replies.
• Assuming the path is the same in both directions. Return routes can differ.
• Running only one trace and ignoring variation over time.

Related

• Ping
• ICMP
• Router
• Packet loss
• टूल: ASN lookup

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.