Internet an new Media

Internet and new Media

Introducing the Internet

The Internet is a global network of networks.

A Global Network of Networks

• The internet is a loose, international collection of networks

• Millions of computers are connected to each another via cables and radio waves

• Public backbones connect all the local together

Internet Statistics

• The number of people online worldwide is thought to be around 2.1 billion

• Around 30.5% of the world’s population

• The number of internet users is increasing by around 7 % year-on-year

Host

• The number of hosts (computers) connected to the internet stands at around 850 million and increase about 10.5 %

Traffic

• Internet traffic – the amount of bytes transferred

• Is increasing by roughly 40 – 50 % every year

• Google has reportedly now seen over a trillion unique URLs

Broadband Subscribers

• Fixed broadband subscribers per 100 inhabitants  Austria 2,003,905

• Wireless broadband subscribers per 100 inhabitants  1,741,246

Mobile is coming

• Sales of new smartphones overtook sales of new PCs

• 40 % of all tweets now are created on mobile devices

• Not just apps: increase use of mobile web browser to access mobile web sites

• Gartner predicts smartphones will overtake PCs as the most common web access device in 2013

Measured Download Speeds

• 20 million broadband speed tests around the world every month

They raw data can be download or explored with Google’s Publish Data Explorer

In Austria

• 6 million people aged 14 and older have access to the internet in Austria

• 3.4 million hosts in the “at” domain

• “willhaben.at”, “derstandard.at” and autoscout24.at” are the most popular web sites in Austria

Internet FAQs (Frequently Asked Questions)

So, the Internet is Run by Google, Right?

• No

• Google, is one of the big commercial players, along with facebook, Amazon, ebay, Microsoft, Apple, …

• Multiple platforms: Windows, Unix, Mac, WebTV, smartphone, …

The Internet and the Web are the Same Thing, Right?

• No

• The web (WWW) is the popular face of the internet: billions of web sites, each comprising on or more web pages

• The web is just one of many services running over the internet

• Others services: email, newsgroups, video streaming, voice calls, …

What is a Web Site?

• Is a set of web pages representing someone or something

• It is based around a single domain name such as wien.at

What is a Home Page?

1. The page which appears when a web browser is started or the browser’s Home button is pressed. You can choose any web pages as your browser’s home page

2. The “front page! Of a web site. The page which is displayed when you visit “wien.at”

What is an Internet Service Provider (ISP)?

• Company which connects your computer to the rest of the internet

• Are often telephone or cable television companies

• Telekom, A1

What is a Local Area Network (LAN)?

• Kind of network typically found within companies or organisations:

• Based on Ethernet of ATM technology

• Also uses internet protocols

Host, Server

• Computer which is open to external online access over the internet

• A host has typically its own name

Server

• A program which runs continuously on a host, listening for requests on a specific port

Port

• Is used for each kind of service (WWW)

Client

• Is a program locally by a user, such as a web browser

Server

Request

TCP/IP

Response

Client

What are Firewalls?

• Is a barrier between a LAN and the outside world.

• Firewall can monitor and block connections into and out from the LAN

What are Intranets and Extranets?

Intranet: private internal network, usually behind a firewall, which runs IP and internet services

Extranet: specifically grants access to parts of the intranet to business partner or specific external users  for login, privat, only with password

What is a Proxy Server?

Forwards requests to their destination and passes responses back to the originator

Newsgroup

Usenet News

• Is users’ network, is the internet’s prime discussion area:

• It comprises some 85,000 discussion groups or newsgroups dedicated to a specific topic,

• Newsgroup names are classified hierarchically by subject

• Articles or messages are posted to these newsgroups by people using appropriate newsreader client software

• Articles are then broadcast from news server to news server

• Some newsgroups are only local to the specific region or organisation and are not broadcast widely

• The set of freely available newsgroups in known as Usenet

A huge resource of discussion

• With over two billion people online, it is potentially possible to get access to the wold exerts in every field

What Usenet is not

1. Usenet is not about delivering news

2. Usenet is not an organisation

3. Usenet is not a democracy

4. Usenet is not fair

5. Usenet is not a right

6. Usenet is not a public utility

7. Usenet is not an advertising medium

8. Usenet is not the internet

What a newsgroup is

• Is like a public note board, but on the internet

• When you send a message to a newsgroup, everyone who reads the group can see it

• Most newsgroups have some rules or conventions about what may or may not be posted

• You have no idea who might be reading your postings, unless they themselves also post

• It is possible to read any message in any group for as long as it remains on your news provider’s server