Exit node
The final address in a proxy chain — the one the destination actually sees and records.
The exit node is the last hop before the destination. Its address is what the target server logs, what geolocation databases resolve, and what any block ultimately applies to.
#Why the distinction matters
You connect to a provider’s gateway, but the gateway is not what the destination sees. Between them may be several internal hops. When a provider advertises a country, they mean the exit node is in that country — the gateway you dial may be somewhere else entirely.
#Checking it
The only reliable way to know your exit address is to ask a service that echoes it back. That is exactly what a proxy checker does: it opens a real connection through your proxy and reports the address the far end observed.
#One request is one sample
Checking once tells you about that exit node at that moment. On a rotating endpoint the next request may leave from somewhere else entirely, so a single check is a diagnostic, not a measurement of the pool.