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NETWORK DEVICES - Coggle Diagram
NETWORK DEVICES
We rely on interconnected networks to deliver and exchange millions of messages between people around the world.
Various equipments are used to create connections
● Hubs & Switches
Hubs extend the range of a network by receiving data on one port and then regenerating the data and sending it out to all
other ports.
A hub can also function as a repeater. A repeater extends the reach of a network because it rebuilds the Signal.
Switches filter and segment network traffic by sending data only to the device to which it is sent.
● Routers and Wireless Access Points
Wireless access points, provide network access to wireless devices, such as laptops, smartphones and tablets.
The wireless access point uses radio waves to communicate with the wireless NIC in the devices and other wireless access points.
Routers connect networks to each other.
Su una rete aziendale o domestica, una porta del router si collega alla connessione WAN e le altre porte si collegano alla
LAN interne. Il router diventa il gateway, o percorso verso l'esterno, per le LAN.
● Modems
A modem is an electronic device that connects to the Internet via an ISP (Internet Service Provider).
.An ISP
usually provides a connection to the Internet and a specific equipment needed to allow the connection.
The modem
converts digital data to analog signals for transmission over a phone line.
The process of converting analog signals to digital and back again is called modulation/demodulation.
● Hardware firewalls
Hardware firewalls protect data and equipment on a network from unauthorized access.
A firewall resides between two or more networks and controls the traffic between them as well as helps prevent unauthorized access.
You also need to consider space, cost, number of computers, and performance requirements.