Page 124 - Web Applications (803) Class 11
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Gateway
As the name implies, a gateway is a path that connects two networks that may
use different networking models. They essentially serve as messengers, taking
data from one system, interpreting it, and transferring it to another. Gateways,
also known as protocol converters, can function at any layer of the network. Switches and routers are less complicated
than gateways. A protocol converter is another name for a gateway.
RJ-45
A registered jack (RJ) is a physical network interface that is used to connect telecommunications
or data devices. Both ends of Ethernet cables have RJ45 connections. As a result, an Ethernet
cable is frequently called an RJ45 cable. Computers are frequently connected to Ethernet
networks using these wires.
Wifi Card
Wi-Fi cards are small, portable devices that connect your desktop or laptop computer to the
internet over a wireless network. Radio waves are used to transmit Wi-Fi signals. The radio
signals are transmitted by the antenna and picked up by Wi-Fi receivers such as PCs and cell
phones with Wi-Fi cards. To receive the signals, these devices must be within the range of a
Wi-Fi network. The signals are then read by the Wi-Fi card, which creates a wireless internet
connection. Many contemporary laptops, mobile devices, and other electronic gadgets have
wireless networking capabilities and do not require a Wi-Fi card.
Modem
A modulator-demodulator, or modem, is a hardware device that allows a computer to
send and receive data through a phone or cable line. It converts data from a digital
format into a format suitable for an analog transmission and vice versa.
Lab Assignment ‘n Activity Experiential Learning
Tryout the following networking simulators:
• Netsim (https://netsim.erinn.io/) is a simulator game with a focus on security that aims to teach you the
fundamentals of how computer networks work. By using the simulator, students may practise attacks
that actual hackers employ and see how they operate. Playing Netsim is totally free. Log in or create a
new account to get started!
122 Touchpad Web Applications-XI

