Page 207 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Zero- day.
Encrypted malware.
Ransomware.
Malicious botnets.
Switching: Basically, a network switch is the traffic code of your wireless network which makes sure that everyone
and every device gets to where they need to go.
Switching is an essential part of every fast, secure wireless network for several reasons:
It helps the traffic on your network flow more efficiently.
It minimizes unnecessary traffic.

It creates a better user experience by ensuring your traffic is going to the right places.
Advantages of Mobile Communication
There are following advantages of mobile communication:
Flexibility: Wireless communication enables people to communicate with each other regardless of location.
There is no need to be in an office or some telephone booth to pass and receive messages.
Cost effectiveness: In wireless communication, there is no need for any physical infrastructure (Wires or cables)
or maintenance practice. Hence, the cost is reduced.

Speed: Improvements can also be seen in speed. The network connectivity and accessibility were much improved
in accuracy and speed.
Accessibility: With the help of wireless technology easy accessibility to remote areas is possible. For example,
in rural areas, online education is now possible. Educators or students no longer need to travel to far-flung areas
to teach their lessons.

Constant connectivity: Constant connectivity ensures that people can respond to emergencies relatively quickly.
For example, a wireless device like mobile can ensure you a constant connectivity though you move from place
to place or while you travel, whereas a wired landline can’t.
GSM (Global System for Mobile communication)
GSM (Global System for Mobile communication) is a digital mobile network that is widely used by mobile phone
users in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is
the most widely used of the three digital wireless telephony technologies: TDMA, GSM and code-division multiple
access (CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of
user data, each in its own time slot. It operates at either the 900 megahertz (MHz) or 1,800 MHz frequency band.
GSM, together with other technologies, is part of the evolution of wireless mobile telecommunications that
includes High-Speed Circuit-Switched Data (HSCSD), General Packet Radio Service (GPRS), Enhanced Data
GSM Environment (EDGE) and Universal Mobile Telecommunications Service (UMTS).
Composition of the network

The GSM network has four separate parts that work together to function as a whole: the mobile device itself, the
base station subsystem (BSS), the network switching subsystem (NSS) and the operation and support subsystem
(OSS).
The mobile device connects to the network via hardware. The subscriber identity module (SIM) card provides the
network with identifying information about the mobile user.

192

CITS : E & H - Electronics Mechanic - Lesson 118 - 126