Introduction to Networks

Q1: What defines a 2-terminal network?
A1: A 2-terminal network is defined by its $iv$ characteristic. Note that this is similar to how a 2-terminal element is defined by its$iv$ characteristic.

Q2: What defines a 2-port network?
A2: A 2-port network is defined by its transfer function that describes how it modifies an input. Since 2 terminals form its input port while the other 2 form its output port, a 2-port network is also called a 4-terminal network.

Q3: Why do we care about networks?
A3: Networks allow us chunk circuits into functional blocks. Circuits may be reduced to more basic networks in analysis. Circuits may also be built up from basic networks in design.