Network Devices - SS3 ICT Lesson Note

Networks rely on a variety of devices to facilitate communication and data exchange. Here are some common network devices:

 

• Router: Routers connect different networks, such as a home network to the internet. They direct data between networks based on IP addresses, ensuring data reaches its intended destination.

 

• Switch: Switches are used within local networks (LANs) to connect devices. They operate at the data link layer and efficiently forward data to the appropriate device within the same network.

 

• Hub: Hubs are outdated but worth mentioning. They connect devices in a network but lack the intelligence of switches. Data sent to a hub is broadcast to all connected devices, leading to network congestion.

 

• Access Point (AP): Access points enable wireless devices to connect to a wired network. They are crucial for Wi-Fi networks, extending network coverage.

 

Source:(educba.com)

 

• Firewall: Firewalls provide network security by filtering incoming and outgoing traffic based on predefined rules. They protect against unauthorized access and malicious activity.

 

• Modem: Modems translate digital data from computers into analog signals for transmission over telephone or cable lines. They also convert incoming analog signals back into digital data.

 

• Gateway: Gateways act as intermediaries between different networks with different protocols. They facilitate communication between networks using different technologies.

 

• Network Interface Card (NIC): NICs are hardware components that connect devices like computers to a network. They provide the physical connection and often include drivers for network communication.