NetPath in NPM can be limited by which factors?

NetPath in NPM can be limited by which factors?

• A. NAT and firewall rules, hop count restrictions, and path visibility
• B. It is always fully visible behind any NAT
• C. No limitations
• D. It always bypasses firewalls

Answer: (D)

NetPath maps an end-to-end route by sending traceroute-like probes and collecting responses from devices along the path. Its accuracy depends on devices along the route answering those probes. NAT can obscure internal hops by translating addresses, which can hide where hops actually occur or collapse multiple hops behind a single NAT boundary. Firewalls can block the probe traffic or the responses, preventing NetPath from learning about certain hops. Hop count restrictions (TTL limits) can prevent probes from reaching or revealing distant segments of the path, and general path visibility—whether routers and devices respond to TTL-expired or probe packets—also affects what NetPath can show. Because of these factors, NetPath isn’t guaranteed to show a complete, visible path in every scenario. Hence, NAT and firewall rules, hop count restrictions, and path visibility are the limiting factors.

NetPath maps an end-to-end route by sending traceroute-like probes and collecting responses from devices along the path. Its accuracy depends on devices along the route answering those probes. NAT can obscure internal hops by translating addresses, which can hide where hops actually occur or collapse multiple hops behind a single NAT boundary. Firewalls can block the probe traffic or the responses, preventing NetPath from learning about certain hops. Hop count restrictions (TTL limits) can prevent probes from reaching or revealing distant segments of the path, and general path visibility—whether routers and devices respond to TTL-expired or probe packets—also affects what NetPath can show. Because of these factors, NetPath isn’t guaranteed to show a complete, visible path in every scenario. Hence, NAT and firewall rules, hop count restrictions, and path visibility are the limiting factors.