Summary: INF 103-4 – 15/2/18

In the next post I’m going to give a summary about what we talk in the class of February 15 of 2018 and in the end of the post I’m going to add the 3 videos that we see in class. We started talking that the profession of computing has a lot of demand in the industry of work and also that the women’s are a minority in this profession.  The professor also explain that the web and the internet are not the same.

Image result for internet

(Internet-world by Benjamin Kanarek Blog, License CC)

¿What is the internet?

Is a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols. It was created by Robert E. Kan and his colleague Vint Cerf on the 70, one of the motives that web was created is because the United States was in the middle of the Cold War with the Soviet Union and they were afraid of a nuclear bomb in the USA territory that destroys all of their communications so they invented the internet and what is incredible about it is that if one connection of the internet broke all the others connections of the web continue to work perfectly well.

This were the first internet connections:

Image result for arpanet 1969

(How the internet start, by http://www.tugurium.com, Licencia CC)

IP address = Internet Protocol

The IP address provides the country that your device is which device is the one you are using and the computer needs the IP address to be able to connect to the red and also every computer have a different IP address and they communicate with each other using the IP of each of them.

Image result for how computer communicate with each other

(Computers communicating, by Dreamstime, License CC)

¿What is the Web?

The web is a way of accessing information over the medium of the Internet. It is an information and sharing model that is built on top of the Internet. The Web uses the HTTP protocol, to transmit data. Web services, which use HTTP to allow applications to communicate in order to exchange things. The Web also utilizes browsers, such as Internet Explorer or Firefox, to access Web documents called Web pages that are linked to each other via hyperlinks. Web documents also contain graphics, sounds, text and video.

HTTP = HyperText Transfer Protocol – HTML = HyperText Markup Language – HTTPS = HyperText Transport Protocol Secure – URL = Uniform Resources Locator

HTTP is the communications protocol used to connect to Web servers on the Internet or on a local network. The primary function is to establish a connection with the server and send HTML pages back to the user’s browser. HTTPS is the protocol used to access a secure Web server. When https:// is used as a Web address rather than the common http://, the session is managed by a security protocol, which is typically SSL, and the transmission is encrypted to and from the Web server, thanks to the HTTPS we can buy things on Amazon or Ebay or navigate on the internet without being afraid of being robbed by a hacker. URL is a protocol for specifying addresses on the Internet also an address that identifies a particular file on the Internet, usually consisting of the protocol, as http, followed by the domain name.

DNS = Domain Name Servers. The domain are like the IP address for the human and the DNS Are the internet’s equivalent of a phone book, they maintain a directory of domain names and translate them to Internet Protocol (IP Address). DNS is diveded in three: .com, .net and .org

Summary:

HTTP and DNS: Manage the sending and receiving of Web files

IP and Routing: Break Down and transport Packets

Wires, Cables and Wifi: Binary Sequences of 1’s and 0’s are sent physically

The 3 videos that we see in class:

 

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