Token Ring is a communication protocol for local area networks (LANs) that connects devices using a star or ring topology. Once it was widely used on LANs but getting displaced by Ethernet.
WIFI hotspot means using a cell phone as a wireless router to offer internet access to a laptop, tablet and other wifi enabled devices.
A bandwidth cap is a service provider-imposed limit on the amount of data transferred by a user account at a specified level of throughput over a given period.
Wide Area Network, commonly known as WAN is a computer network that extends over a relatively large geographical area. The largest WAN in existence is the Internet. A WAN functions like a Local Area Network (LAN), just on a larger scale.
Network security is the set of activities and strategies adopted to protect the network and the systems from various kind of attacks.
A network adapter is the unit of a computer's hardware that a computing device employs for interfacing over a network with another computer. It could be wired or wireless.