フリー問題

問題文

A tunnel between two label routers drops large packets silently and the sender keeps retransmitting them. Which statement is correct?

選択肢

1. The numbered document that specifies path maximum discovery for the fourth version of the network layer is one thousand one hundred ninety-five, the form of key distribution that an implementation has to support is external keying, and the mode of the key exchange that has to be supported once automatic keying is implemented is main mode.
2. The numbered document that specifies path maximum discovery for the fourth version of the network layer is one thousand one hundred ninety-five, the form of key distribution that an implementation has to support is manual keying, and the mode of the key exchange that has to be supported once automatic keying is implemented is aggressive mode.
3. The numbered document that specifies path maximum discovery for the fourth version of the network layer is one thousand one hundred ninety-one, the form of key distribution that an implementation has to support is manual keying, and the mode of the key exchange that has to be supported once automatic keying is implemented is main mode.
4. The numbered document that specifies path maximum discovery for the fourth version of the network layer is one thousand one hundred ninety-one, the form of key distribution that an implementation has to support is external keying, and the mode of the key exchange that has to be supported once automatic keying is implemented is aggressive mode.