Define LAN, WAN, and MAN?
LAN (Local Area Network) → Small area (home, office).
WAN (Wide Area Network) → Large area, multiple cities/countries (internet).
MAN (Metropolitan Area Network) → Covers a city/metropolitan area.
What is the difference between a switch and a hub?
Hub → Sends data to all devices (less secure, less efficient).
Switch → Sends data only to the intended device (more efficient).
What is the difference between a router and a switch?
Router → Connects different networks (LAN to internet).
Switch → Connects devices within the same network.
What is an IP address, and what are its two main versions?
An IP address is a unique identifier for devices in a network.
Versions: IPv4 & IPv6.
What is the difference between public IP and private IP?
Public IP → Routable over internet, globally unique.
Private IP → Used inside networks, not routable outside (e.g., 192.168.x.x).
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