Company ABCs network is based on the star topology. What will make this topology scalable?
a. in the event of a network failure, it is very difficult to troubleshoot
b. the failed connection will be down and only the two hosts between the failed connections will have no network connectivity
c. no scalability since the whole network will be down and none of the hosts will have network connectivity
d. the ability to add more computers without disrupting the operation of the network