The Internet A Wide Area Network across the world The network of networks –Lots of smaller...

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The Internet • A Wide Area Network across the world • The network of networks – Lots of smaller networks joined together

Transcript of The Internet A Wide Area Network across the world The network of networks –Lots of smaller...

Page 1: The Internet A Wide Area Network across the world The network of networks –Lots of smaller networks joined together.

The Internet

• A Wide Area Network across the world

• The network of networks– Lots of smaller networks joined together

Page 2: The Internet A Wide Area Network across the world The network of networks –Lots of smaller networks joined together.

Internet Services

• World Wide Web (www or just web)– Used for browsing or searching

• E-mail– Communication & exchange of information

• File transfer– Sending & receiving large amounts of

information

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File download

• Freeware

– Totally free to download, but can’t be sold on

• Shareware

– Try the software first, pay if you like it (based on trust)

• Commercial

– You pay by credit or debit card on a secure site, then you download the software and a code number to run it

You can download files, either data files or program files.

Data files are loaded and used by another program (e.g. you may download a form and fill it in using the program ‘Word’)Program files actually do something on the computer, they are a list of instructions to make the computer do something.

Types of programs you can obtain

Page 4: The Internet A Wide Area Network across the world The network of networks –Lots of smaller networks joined together.

Accessing the Internet

• Dial-Up– Uses a modem and an ordinary

phone line to dial up the number of your ISP that connects you to the internet.

• Broadband– Uses either a digital subscriber line

(DSL) or a cable modem

• Modem– The telephone line doesn’t understand binary– A modem is needed to translate for the computer

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World Wide Web

• Information is stored in web pages on web sites

• These pages can be viewed in a browser

• They are found by an address such as:– www.google.co.uk – www.msn.com

• Hyper links are used to ‘travel’ around the web

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The Web - HTML• Hyper Text Mark-up Language

• The language used to write web pages

<"http://www.w3.org/TR/html4/loose.dtd"><html><head>

<meta name="Description" content="Your description"> <meta name="Keywords" content="first, second, third"> <title>Title of the document</title> <base href="http://www.yourdomainname.com/images/"></head> <body> The body of the document</body></html>

Page 7: The Internet A Wide Area Network across the world The network of networks –Lots of smaller networks joined together.

Search Engine

• Special web site to help you find information

• A big database!

• Some of the main search engines:


ASCOM NETWORK TESTING EVOLVING NETWORKS. TRUSTED SOLUTIONS.mteh.hr/datasheets/Product14_Ascom Network Testing Overview 2013... · ASCOM NETWORK TESTING EVOLVING NETWORKS. ... TEMS

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Actor‐Network Theory VS Network Analysis VS Digital Networks Are We Talking About the Same Networks?

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lightreading.com Network Transformation · Jim joined Heavy Reading after nine years at Nortel Networks, ... OSS and BSS systems? ... Network Transformation • • •

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I. Introduction to Networks 1 Networks - Wireless Network & System

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Computer Networks: Introduction1 Introduction. Computer Networks: Introduction2 Network Definitions and Classification Preliminary definitions and network.

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NETWORK SCIENCE RANDOM NETWORKS

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Data mining --- mining graphslohall/dm/CIS6930_dm_gm.pdfMathematics of Networks (Graphs) CAP5771.1 What is a network/graph? A collection of vertices/nodes joined by edges Different

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1 Networks and the Internet Unit E. 2 Objectives Introduce Networks Classify Networks Understand Network Topology Explore Network Hardware Explore Communications.

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Implementation of smartphone applications supporting end ... · APNS GCM Dual Stack Networks IPv6 Networks IPv4 Networks IPv6 Global Network IPv4 Private Network 1 IPv4 Private Network

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The physics of networks - people.cas.uab.eduxujingw/The physics of networks.pdf · In its simplest form, a network is a collection of points, or nodes, joined by lines, or edges.

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CT542 Networking Overview. Content Computer Networks vs. Distributed Systems Uses of computer networks Network Hardware Network Software Network Technologies.

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