Jen's laptop that is wirelessly connected to the home network router and turned on; her husband's PC, which connects to the router by a cable that is turned off; her mother's virus-infected computer that has been unplugged from the router; and her daughter's smartphone that is wirelessly connected to the router.

The network is a LAN.

Explanation:

Computer networks are interconnection and intercommunication of computer devices to share resources. There are several types of computer networks, they are, LAN or local area network, WAN or wide area network, PAN or personal area networks, etc.

A LAN is a network of computer devices ranging from a floor of a building to the building of more. WAN is a network of LANs while a PAN is just a short 10-meter network between two Bluetooth connected devices.

The network described in the question is a wireless LAN or WLAN which is still a local area network.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.