Web Technology
Web (definition)
Web - a system for finding information on the internet, in which documents are connected to other documents
Internet (definition)
Internet - an international computer network that allows people to share information around the world
IoT (definition)
IoT (Internet of Things) is an advanced automation and analytics system which exploits networking, sensing, big data, and artificial intelligence technology to deliver complete systems for a product or service.
Did the Internet become popular quickly?
It took many years for the Internet to became popular around the world
Some components that make up the WWW include:
HTTP, HTML, web browsers, servers, DNS, hosting services, Cascading Style Sheets (CSS)
Types of communication media: dial-up, DSL/ADSL, cable, 3G/4G
Dial-up - it is much slower than other types. It may be the only option available in some areas
DSL/ADSL - it plugs into your phone line
Cable - it uses your cable TV connection. It is known as broadnamd Internet connection (like DSL)
3G/4G - it is a wireless Internet connection. It is often used by smartphones
Benefits that IoT brings.
Optimal Asset Utilization, Insightful Data from Sensors, Enhanced Customer Service, Enhanced Mobility and Agility, Cost-Effectiveness, Enhanced Business Opportunities
IoT Applications and IoT ecosystem
Wearables, smart home applications, health care, smart cities, agriculture, industrial automation
The IoT ecosystem consists of sensors, gateway, platform, database, applications
... is a process that transforms encrypted information into its original format
Decryption
... is a type of shielded and insulated copper cable that is used in computer networks and to deliver cable TV services to end users.
Coaxial cable
Problems related to the IoT and their solutions
Cloud attacks, lack of regulation about IoT, limited AI, challenges with compatibility, understanding IoT
The Internet of Things Security Foundation (IoTSF)
... is a physical location where people can obtain Internet access, typically using Wi-Fi technology
Hotspot
What is the difference between SMTP and POP?
SMTP is a protocol used for sending emails from a sender's email client to the recipient's email server, while POP is a protocol used for retrieving emails from the recipient's email server to the email client. In other words, SMTP is used for outgoing mail transfer, while POP is used for incoming mail retrieval
Types of the Internet protocols and their definitions
TCP/IP - it creates connection and exchanges packets of data/it provides devices with unique adresses; HTTP - it exchanges information over the Web; SMTP - it transfers email messages from client computer to an email server; POP - it transfers mail from an email server to a client inbox; UDP - an
alternative data transport to TCP used
for DNS, Voice over IP, and file
sharing; FTP - it transfers files between a local and remote host computer; IRC - it transmits text messages in real time between online users; VoIP - it transmits voice conversations over the Internet; Big Torrent - it distributes files using scattered clients rather than a server
Future of the IoT
Circular economy and IoT, 5G networks and IoT, empowering IoT with artifical intelligence, giving users what they want, foundations of industry 4.0, strengthening the IoT security landscape, decentralisation of the IoT landscape
How do Web servers work?
A page on the internet can be viewed, when the browser requests it from the web server and the web server responds with that page