Efbu chapter 1:
The internet consist of two main parts:
- Hardware
- Software
The first electronic computer was produced at the end of 1943 by the British during the second world
war to decipher German coded messages -> morse code
Device: any instrument we can use to access anywhere a computer network or internet network.
A processor is a piece of hardware that can perform certain basic tasks and carry out the instructions
of programs.
Hard drive is a component upon which information could be stored in the memory.
ARPA -> advanced research projects agency -> ARPANET -> network of computers were connected
with each other in 1971.
In 1983 ARPANET transferred to TCP/IP for data transfer over the network. This was the true birth of
the internet as we have it now: an open network of underlying networks based on TCP/IP.
Hypertext is the basis of the computer language HTML/
Website is a collection of related webpages, including multimedia contents, typically identified with a
common domain name, and published on at least one web server.
Roaming service -> connecting to local network abroad -> is made possible through internet service
providers who have cooperative agreements to grant each other’s customers local access to the
internet.
The internet is an expanding global infrastructure network of computers, servers, routers and other
devices based on generally accepted standards and established techniques and standards.
Trends in communication in the internet:
- On-to-many -> mass media
The internet is used as mass medium, where companies communicate information to anyone
through their website.
- One-to-few -> segmented media
Companies can target their message to a group of people or send them an individual
message.
- One-to-one -> personal media
Companies can send much focused on- to-one communication with consumers.
- Many-to-many -> social media
Social media allows companies & individuals their own place for opinion, photos or videos on
the web.
- Few-to-few -> social media
Private groups, blogs, apps and social network on social media.
,The semantic web: known as web 3.0, is the tendency of internet applications to be more attuned to
each other, cooperate with each other or can be integrated.
Web 1.0 is considered as the web of static documents. Web 2.0 as the web that also interacts with
users and web 3.0 as the intelligent web.
Internet: a large network, a set of computers that can communicate with each other.
Routing: there is layering in the structure of the internet by sending all those packets of data: the
routing.
Peer-to-peer network -> P2P -> is a network-based on equality of the various connected computers,
so all taking part computers are able to start and end tasks.
Speed of the internet depends on:
- Throughput of the hardware.
- Type of connection -> 5G, 4G, WIFI.
- Number of users on the network.
- The total traffic throughout the internet.
Bandwidth -> transferring capacity per unit of time of a network, the amount of MB’S that can be
transported per unit of time.
Streaming media: the collective term for the technology to distribute directly via computer networks
audio and video.
Hardware: any tangible equipment -> smartphone, laptop, IPAD, etc.
Software: also known as programming, is another word for computer programs.
Software can be divided in:
- System software, this makes your device or network works -> IOS, Microsoft.
- Application software, allows you to do certain tasks, writing text in word, doing math in
Excel, etc.
Types of software:
- Commercial software
, Developed by a person or company, only the program that you install on your computer is
supplied.
- Freeware and shareware
Both forms of distribution and use of the software.
1. Freeware: the software is always free
2. Shareware: you have to pay for it.
- Open-source software
Software whose entire source code is freely available: source code is the programming
language wherein ‘something’ is written.
- Cripple ware
The software is free, but there are parts blocked, or the functionality is limited. For an
additional fee, you get the full package.
- Malware
Malware is the generic term for malicious or damaging software such as viruses.
A software bug: an error, flaw, failure or fault in a computer program or system that causes it to
produce an incorrect or unexpected result, or to behave unintended ways.
Wi-Fi is a wireless technology, which is used for small wireless networks and has only a limited
working range from the router.
Near Field Communication -> NFC -> form of data transfer which is on the rise and in the short term
is becoming important.
IBeacon is a collective term for devices that have signal interaction via Bluetooth low energy (BLE).
Long range power -> LORA -> a technology that can exchange small packets of data between objects
and systems used for traffic lights, street lighting, etc.
An access provider is a company that provides a connection to the internet -> T-Mobile, KPN.
A mirror website or mirrors are replicas of other websites. Such websites have different URLS then
the original but host identical content. The main purpose of mirrors is often to reduce network
traffic, improve access speed, improve the availability of the original site, or provide a real-time back-
up of the original site.
Hotspot: a specific location that provides internet access via a wireless local area network (WLAN).
Types of internet users:
- Influencer: Creators -> making contents, blogs, status updates, etc.
- Lurker: uses interactive websites but passively observes content and doesn’t reveal
information about their selves.
- Troll: someone who quarrels or upsets people on the internet.
- Gullible: these users accept to quickly what they read, they do not dive deeper into the
content and only read headlines.
Characteristics of the internet:
- Everything is highly measurable