What is the main purpose of a local network adapter?

The main purpose of a local network adapter is to connect a computer to a wired network. This device, often referred to as a network interface card (NIC), allows the computer to communicate with other devices on the same network through an Ethernet cable. The local network adapter converts data into the appropriate signals to be sent over the network and enables the computer to send and receive information, such as files, resources, or internet access through a router.

Other options touch on functionalities that are not the primary role of a local network adapter. Enhancing internet speed is more related to the overall network configuration and capabilities rather than the role of the adapter itself. Facilitating wireless connections refers to wireless network adapters, which are different from wired adapters. Increasing local storage options does not pertain to network connectivity but involves storage devices like hard drives or SSDs.