Topics in ICTTypes of computer network Routers, Types and Functions of Routers Computer scheme of work, SS1, First Term Computer scheme of work, SS1, Second Term Computer scheme of work, SS1, Third Term Introduction to computer networks Domain Name System: How DNS works and Types of DNS Servers Open Systems Interconnect: Layers of the OSI Model Internet of Things (IoT), How IoT works, its advantages and challenges How to consume less data on android phone Best Programming Languages to learn The internet and world wide web explained Computer Hardware, Parts and Functions of Computer Hardware
Academic Questions in ICT
What is the first step towards disabling automatic image download on WhatsApp?
A. Click on the three dots on the top right hand corner
B. Click on the WhatsApp logo
C. Click on the settings icon on the top right corner
D. Click on the settings icon located on the to top-center of the app
E. Click directly on the storage and data icon located on the top right corner
F. Click on the mobile data usage icon located on the top right corner
The followings are ways to conserve data on android phones except _____.
A. Turning on data saving mode
B. Activating background apps
C. Use of Wi-Fi to update apps
D. Disable automatic image download on WhatsApp
E. Watch low resolution videos on youtube
F. Utilizing a reputable data saving app on google playstore
Twitter was launched in _____.
Due to the limitation of the Internet Protocol version 4 address, _____ was created.
The term _____ describes the billions of physical devices that will be connected to the internet.
A. Internet of Everything
B. Internet of Physical Devices
C. Internet of Things
D. Internet of Objects
F. Internetworking of Objects
A globally interconnected network system that utilizes TCP and IP to transmit data via various media is the _____.
A. World Wide Web (www)
The above image shows the _____ in a computer.
A. Expansion slot
B. Hard Disc Drive
C. Optical Drive
D. Power Supply Unit
F. Synchronous Dynamic Ram
The clock speed of a computer is the speed at which the _____.
A. HDD saves data
B. FDS saves data
C. SSD saves data
D. GPU receives and sends data
E. CPU processes data
F. RAM transfers data
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A good knowledge of the Open Systems Interconnection (OSI) is fundamental for those willing to take up a career in networking.
Networking engineers will always consider the OSI model as a reference when working on the different layers of their job.
The (Open Systems Interconnection) OSI model is a reference model that defines and describes the various protocols, concepts, terms and functionalities in networking.
The ideal reason why the OSI model was brought forth is to clearly explain the processes of networking in seven layers.
Below are the seven layers of the OSI model:
A similar networking model to the OSI model is the TCP/IP model, also called the TCP/IP stack or Department of Defense (DoD) model.
With regards to modern day networking and internet, The TCP/IP model is the preferred choice. In fact, computer networking today uses only the TCP/IP stack in its implementation. Regardless, an understanding on the OSI model of networking is crucial to all network administrators.
It is important to state that the term 'internet' is derived from 2nd layer of the TCP/IP stack.
The TCP/IP stack comprises of 4 layers unlike the OSI model which has 7. The image below shows the summary of the OSI layers alongside their functions.
Note: Although the OSI model of networking is no longer supported by computer hardware manufacturers, It’s still crucial you understand how each of its layer work since its knowledge is applicable in network troubleshooting and comprehension.
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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 10 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.
Amazing facts in ICT
YouTube is a video-sharing platform which commenced operations on February 14, 2005 (Valentine's day). Three former PayPal employees -> Chad Hurley, Steve Chen and Jawed Karim created the YouTube service (as a dating app) until Google bought it in November 2006 for US$1.65 billion
Smoking near an Apple (Mac) computer voids the warranty.
When you add /4 to the end of Facebook's URL, it will take you to Mark Zuckerberg.
You can try it on you own; or better still, try the link below:
Apple iPad retina display is actually manufactured by Samsung
The big five tech companies of the world as at 2018 are :
NOTABLE POINTS IN ICT
Computer Network is a group of computers that are linked to each other such that they can share resources.
Generally, these groups of computers that form a network are called nodes.
Some of these nodes will function to store information which will be served to other computers. The nodes that function to store and serve such information are known as servers.
Some of the computers (nodes) will request information from the server. The computers that functions to request information from the server are known as clients.
The internet and the world wide web (www) isn't the same thing.
The internet is formed from the joining or linking of different networks.
For instance, Google's network, Facebook's network and Yahoo's network are among the many other networks that make up the internet.
World Wide Web on the other hand is a collection of linked pages (for instance, this page you're on).
There are actually billions of linked pages in various servers around the world.
You require the internet and a web browser to get to access the World Wide Web
Types of Networks based on geographical size
Personal Area Network (PAN): An instance is a Bluetooth connection between two devices.
Local Area Network (LAN): This is the network under a single administrative control and usually within a building.
Campus Area Network (CAN): This network connects various devices within a campus or college
Metropolitan Area Network (MAN): This network connects two offices or companies within a city.
Wide Area Network (WAN): This network connects devices throughout the globe. The internet is a typical example of a WAN.
Functions of a router: