Looking Glass (mtr, ping, traceroute)

In an internet and networking context, "Looking Glass" is a tool or service that lets users "look" into another network or system to analyze or measure its performance. Internet service providers (ISPs) and network operators often use it to monitor and identify network problems.

Important aspects include:

• Network testing: Runs tests such as latency measurement (ping), route testing (traceroute), and network stability checks.
• Network quality analysis: Helps operators identify failure points, optimize routes, and respond to problems faster.
• Network troubleshooting: Runs commands and tests to detect connection failures or issues.
• BGP (Border Gateway Protocol) information: Some services provide BGP table information so users can inspect routes and how data is directed between internet points.
• Public access: Some providers and institutions offer public Looking Glass services for external testing and analysis.

Looking Glass may be accessed through a web interface or network protocols such as Telnet or SSH. It is often operated by an internet service provider or network organization and offered free for public or customer use.