When Creating Network Diagrams, What Icon Description Typically Represents a Network

When creating network diagrams, what icon description typically represents a network router?

A) An icon that has a hockey-puck shape with two arrows pointing inward and two arrows pointing outward.
B) An icon that resembles a brick wall.
C) An icon that is rectangular in shape, with squiggly lines on the front.
D) An icon that is rectangular, which contains four arrows pointing in opposite directions.