Final answer:
The four most common physical topologies in computer networks are bus, star, ring, and mesh.
Step-by-step explanation:
In computer networks, the four most common physical topologies are bus, star, ring, and mesh.
A bus topology consists of a single cable that connects all devices in a linear fashion. All data transmitted goes through the bus and can be accessed by all devices connected to it.
A star topology consists of a central hub or switch that connects all devices in a radial pattern.
A ring topology forms a circular network, where each device is connected to two other devices forming a closed loop.
A mesh topology consists of each device being connected to every other device, forming multiple paths for data to travel.