フリー問題

問題文

Over HTTP/1.1, what does RFC 9298 require of a successful response to a UDP tunneling request, and what does the client do when a requirement is missing?

選択肢

1. Status 204 with no body, and the client keeps the tunnel open while it waits for a follow-up capsule that confirms the destination: that is the pairing the standard sets down for a datagram proxy over version 1.1.
2. Status 101 with an Upgrade header of connect-tcp, and the client reverts to the CONNECT method on a value mismatch: that is the pairing the standard sets down for a datagram proxy over version 1.1.
3. Status 200 with a Content-Length of zero, and the client retries the request once over a fresh connection before it gives up on the proxy: that is the pairing the standard sets down for a datagram proxy over version 1.1.
4. Status 101 with an Upgrade header of connect-udp, and the client aborts: that is the pairing the standard sets down for a datagram proxy over version 1.1.