Computer Network, A system of interconnected computers that share data, resources, and services., Local Area Network (LAN), A network that connects computers within a limited geographic area, such as a building., Personal Area Network (PAN), The smallest type of network that connects devices within a very short range., Metropolitan Area Network (MAN), A network that covers a city or large campus., Wide Area Network (WAN), A network that connects computers over a large geographical area, like the Internet., Wireless Local Area Network (WLAN), A local area network that uses wireless technology like Wi-Fi., Virtual Private Network (VPN), A network that allows secure remote connections over the internet., Protocols, A set of rules for communication between devices in a network., IP Addresses, A unique string of numbers that identifies a device on a network., Bluetooth, A short-range wireless communication technology., Simplex mode, A communication mode where data flows in only one direction., Half-Duplex mode, A communication mode where data flows in both directions, but not at the same time., Full-Duplex mode, A communication mode where data flows in both directions simultaneously., Router, A device that forwards data packets between computer networks., Firewall, A network security system that monitors and controls network traffic.

Unit 2 - C -

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