Which of the following connectors is specifically used in terminating local area networks?

The connector that is specifically used in terminating local area networks (LANs) is the RJ-45 connector. RJ-45 connectors are designed for twisted pair cables, such as Cat5e, Cat6, and Cat6a, which are commonly used for networking purposes in homes and businesses. This type of connector accommodates eight pins, allowing for multiple data transmission pathways, making it well-suited for Ethernet connections.

RJ-11, although similar in appearance to RJ-45, is primarily used for telephone connections and supports only two pairs of wires. LC and ST are types of fiber optic connectors, which are used to terminate fiber optic cables rather than copper-based Ethernet cables typically found in LANs. Therefore, the use of RJ-45 in terminating local area networks is specifically tied to its capability to support Ethernet connectivity, which is fundamental for establishing reliable network infrastructure.