Which tool can map network topology and display OSI Layer 2 and Layer 3 topology data while tracking network changes?

Which tool can map network topology and display OSI Layer 2 and Layer 3 topology data while tracking network changes?

• A. OpenDoor
• B. Network Topology Mapper
• C. network diagram
• D. Tails

Answer: (B)

Mapping a network and seeing how devices connect at both Layer 2 and Layer 3 while watching changes over time is what a topology mapper is built to do. This tool automatically discovers devices, links, and IP paths, and it builds diagrams that reflect Layer 2 connections (like which devices are on which switch ports) as well as Layer 3 routing paths (which routers and subnets are involved). It also stores historical data, so you can track changes—new devices appearing, links going up or down, or IP Address changes—across scans. Practically, it uses discovery methods such as SNMP, LLDP/CDP, and traceroute to gather the information and then presents it in an up-to-date visual map. The other options don’t fit as well. OpenDoor isn’t a known tool for network topology mapping. A generic network diagram tends to be a static, manual representation rather than an automatic, change-tracking map. Tails is a privacy-focused Linux distribution unrelated to network discovery or topology mapping.

Mapping a network and seeing how devices connect at both Layer 2 and Layer 3 while watching changes over time is what a topology mapper is built to do. This tool automatically discovers devices, links, and IP paths, and it builds diagrams that reflect Layer 2 connections (like which devices are on which switch ports) as well as Layer 3 routing paths (which routers and subnets are involved). It also stores historical data, so you can track changes—new devices appearing, links going up or down, or IP Address changes—across scans. Practically, it uses discovery methods such as SNMP, LLDP/CDP, and traceroute to gather the information and then presents it in an up-to-date visual map.

The other options don’t fit as well. OpenDoor isn’t a known tool for network topology mapping. A generic network diagram tends to be a static, manual representation rather than an automatic, change-tracking map. Tails is a privacy-focused Linux distribution unrelated to network discovery or topology mapping.