A disadvantage of a bus network is that _____. a. failure in one workstation necessarily affects other workstations on the network b. data flows in only one direction from one computer to the next c. devices cannot be attached or detached without disturbing the rest of the network d. performance can decline as more users and devices are added

A bus network is an arrangement in a local area network (LAN) in which each node is connected to a main cable or link called the bus.
The advantages of a bus network are: it is easy to install. it is cheap to install, as it doesn't require much cable.

The disadvantages of a bus network are:

If the main cable fails or gets damaged the whole network will fail.
As more workstations are connected the performance of the network will become slower because of data collisions.
Every workstation on the network "sees" all of the data on the network – this is a security risk.

Bus topology is used for small workgroup local area networks whose computers are connected using a thinnet cable. Trunk cables connecting hubs or switches of departmental LANs to form a larger LAN.
Bus topology uses one main cable to which all nodes are directly connected. The main cable acts as a backbone for the network. One of the computers in the network typically acts as the computer server. The first advantage of bus topology is that it is easy to connect a computer or peripheral device.