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In the early 1970s, Vint Cerf and Bob Kahn began on a working of Communication Network that actually survived a nuclear attack.

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Internet is made of incredibly large number of independently operated networks. Fully distributed, no center control system.

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- Incredible journey of information through the Internet
- Some basic protocols (IP, UDP, TCP)
- Domain Name System (DNS)

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+ ARPANET
+ Attached Resource Computer NETwork (ARCNET)
+ Token Ring and Network Topology
+ The Ethernet
+ 5g

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 Attached Resource Computer NETwork (ARCNET)

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 Attached Resource Computer NETwork (ARCNET)

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In 1986, Datapoint Corporation developed ARCNET, a communications protocol for local area networks (LANs).

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In the 1980s, token ring protocols became more popular, mostly as a response from IBM to the openness of the new Ethernet protocol.

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Ethernet was developed in 1973 by Bob Metcalfe at Xerox PARC, and it wasn’t patented until 1975. The open Ethernet standard took another five years, and was standardized in 1983 as IEEE 802.3.

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Because Ethernet is a protocol and not a type of cable, there are many different kinds of Ethernet cables available.

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two/group of people far away want to chat or job exchange with each other

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App: Teams, Zoom, Gg meet
Advantages​
Easily connect with each other​
Save money and travel time​
Reduce traffic/​environmental problems​
The initiative, comfort when working

Disadvantages​
Easily lose connection​
Can’t develop soft skills such as communication and behavior​
Reduce productivity and work efficiency​
Create for themselves isolation, lack of initiative and reduce professionalism at work
Look at the computer screen a lot is easy to get eye disease

→ Suitable for the protection of health during Coronavirus

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service that connects members with similar interests on the Internet together

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App: Facebook, Instagram, Youtube, …
Advantages​
Global connection: reach many people, informations, …​
Relax after school or work​
New to language learning and new understanding of culture
Job search
Sale online
Instant communication

Disadvantages​
Possibility of fraud or identity theft​
Cyberbullying​
Waste of time and reduce work productivity​
Easily misleading information
Buy wrong products

→ Entertainment and access to information need to be selective, use trusted apps to avoid stealing personal information

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