Difficult to administer/troubleshoot.
Limited cable length and number of stations.
If there is a problem with the cable, the entire network goes down.
Maintenance costs may be higher in the long run.
Performance degrades as additional computers are added or on heavy traffic.
Proper termination is required.(loop must be in closed path).
If many computers are attached, the amount of data flowing causes the network to slow down.
Significant Capacitive Load (each bus transaction must be able to stretch to most distant link).