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The famous port number used for HTTP is.

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The famous port number used for HTTPS is.

The famous port number used for DNS is.

The number of socket type of "____" is 1, that uses IPPROTO_TCP with protocol number 6.The number of socket type of "SOCK_DGRAM" is 2, that uses IPPROTO_UDP with protocol number____.

The socket.getaddrinfo() with the flag of "____" will filter out any addresses that are impossible for your computer to reach.