The net package

The net package of the Go Standard Library is all about TCP/IP, UDP, domain name resolution, and UNIX domain sockets. The net.Dial() function is used to connect to a network as a client, whereas the net.Listen() function is used to tell a Go program to accept incoming network connections and thus act as a server. The return value of both net.Dial() and net.Listen() is of the net.Conn data type, which implements the io.Reader and io.Writer interfaces—this means that you can both read and write to a net.Conn connection using code related to file I/O. The first parameter of both net.Dial()and net.Listen() is the network type, but this is where their similarities end.

The net.Dial() function is used for connecting to a remote server. The first parameter of the net.Dial() function defines the network protocol that is going to be used, while the second parameter defines the server address, which must also include the port number. Valid values for the first parameter...