Correct option is A
A
router is a networking device that connects two or more network segments and directs data packets between them. It determines the best path for data transmission based on the network's configuration and routing protocols.
Important Key Points:
1.
Router:
· Connects different networks (e.g., LAN to WAN).
· Operates at the
network layer (Layer 3) of the OSI model.
· Uses IP addresses for data transmission.
2.
Functions of a Router:
· Connects multiple networks (e.g., home network to the internet).
· Provides NAT (Network Address Translation) to allow multiple devices to share a single public IP.
3.
Examples of Routers: Home Wi-Fi routers, enterprise routers, and core routers in ISPs.
4.
Related Devices:
·
Switch: Operates at Layer 2, connecting devices within a single network.
·
Bridge: Connects two network segments within the same network.
Knowledge Booster:
·
Topology: Refers to the arrangement of devices in a network, not a device.
·
Routing: A process performed by routers, not a physical device.
·
Primary Network: Not a standard networking term.
