An Ethernet star LAN is implemented using: B. a self-programming switch at the center of the star.
In Computer technology, a network topology can be defined as the graphical representation of the various networking devices that are used to create and manage a network connection.
In Computer networking, there are six (6) main types of network topology and these include the following:
Generally speaking, an Ethernet star local area network (LAN) simply refers to a type of network topology in which all of the network devices are directly connected to a common hub (centralized computer) or hub-and-spoke and it can be implemented by using a self-programming switch that is installed at the center of the star.
Read more on topology here: brainly.com/question/17036446
#SPJ1