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What is a Network?
Two or more computer systems linked by a transmission medium that share protocols to exchange data.
Client-Server vs. Peer-to-Peer
Client-Server: Centralized model where servers provide resources to clients. Peer-to-Peer: Decentralized model where each host is both a client and a server.
LAN vs. WAN
LAN (Local Area Network): A network in a single geographical location. WAN (Wide Area Network): A network of networks connected over long-distance links.
Physical vs. Logical Topology
Physical: The actual placement of nodes and cable connections. Logical: The path data flows through the network, regardless of the physical layout.
Star Topology
Each node connects to a central forwarding device (like a switch). It's the most common physical topology but has a single point of failure.