if the Conn:Channel ratio is not 1:1 please help me understand API

[ORESoftware]

ChatGPT says this:

but the API is like this:

so how could I access any other channels associated with the TCP conn?

[ORESoftware]

nevermind, looks like you open a channel like this:

    ch1, err := conn.Channel()
    failOnError(err, "Failed to open a channel")
    defer ch1.Close()

    ch2, err := conn.Channel()
    failOnError(err, "Failed to open a channel")
    defer ch2.Close()

my only question - is there a default channel or is the default no channel?