What device allows wireless systems to communicate within the same network?

A Wireless Access Point (AP) is a crucial device in networking that allows wireless systems, such as laptops, smartphones, and tablets, to connect to a wired network. The AP acts as a bridge between the wireless devices and the wired infrastructure of the network, enabling these devices to communicate with one another and access shared resources like the internet, printers, and file servers.

In a local area network (LAN), the wireless access point broadcasts a signal that wireless devices can detect and connect to. Once connected, the AP facilitates communication between the devices as well as between the devices and the outside internet, depending on the network's configuration. It plays a central role in facilitating connectivity in environments where wireless access is essential, such as homes, offices, and public spaces.

The other options describe different devices with distinct functions. A modem connects a network to the internet by converting digital data into a format suitable for transmission over telephone lines or cable. A router is used to direct data packets between different networks and manage traffic, often including capabilities to connect wired devices. A Network Interface Card (NIC) allows a device to connect to a network but does not provide the wireless connectivity that an access point does. Thus, the wireless access point is specifically designed for the purpose of