Lecture 02 html and css basics

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Lecture 02 html and css basics

Networking In General What is a computer Network? A network is any collection of independent computers that communicate with one another over a shared network medium. A computer network is a collection of two or more connected computers.

When these computers are joined in a network, people can share files and peripherals such as modems, printers, tape backup drives, or CD-ROM drives. When networks at multiple locations are connected using services available from phone companies, people can send e-mail, share links to the global Internet, or conduct video conferences in real time with other remote users.

When a network becomes open sourced it can be managed properly with online collaboration software. As companies rely on applications like electronic mail and database management for core business operations, computer networking becomes increasingly more important.

However, in this day and age simply having internet is not enough, you need to be able to get high speeds that all companies from Verizon to Megapath should be able to provide. At least two computers Server or Client workstation.

LANs Local Area Networks A network is any collection of independent computers that communicate with one another over a shared network medium. LANs are networks usually confined to a geographic area, such as a single building or a college campus.

LANs can be small, linking as few as three computers, but often link hundreds of computers used by thousands of people. The development of standard networking protocols and media has resulted in worldwide proliferation of LANs throughout business and educational organizations.

This is accomplished by connecting the different LANs using services such as dedicated leased phone lines, dial-up phone lines both synchronous and asynchronoussatellite links, and data packet carrier services. Wide area networking can be as simple as a modem and remote access server for employees to dial into, or it can be as complex as hundreds of branch offices globally linked using special routing protocols and filters to minimize the expense of sending data sent over vast distances.

Internet The Internet is a system of linked networks that are worldwide in scope and facilitate data communication services such as remote login, file transfer, electronic mail, the World Wide Web and newsgroups.

With the meteoric rise in demand for connectivity, the Internet has become a communications highway for millions of users.

The Internet was initially restricted to military and academic institutions, but now it is a full-fledged conduit for any and all forms of information and commerce.

Internet websites now provide personal, educational, political and economic resources to every corner of the planet.

Lecture 02 html and css basics

Intranet With the advancements made in browser-based software for the Internet, many private organizations are implementing intranets. An intranet is a private network utilizing Internet-type tools, but available only within that organization.

For large organizations, an intranet provides an easy access mode to corporate information for employees. Using a VPN helps you save money by using the public Internet instead of making long—distance phone calls to connect securely with your private network. Network can be divided in to two main categories: In peer-to-peer networking there are no dedicated servers or hierarchy among the computers.

All of the computers are equal and therefore known as peers. Peer-to-peer networks are good choices for needs of small organizations where the users are allocated in the same general area, security is not an issue and the organization and the network will have limited growth within the foreseeable future.

Databases and management of applications such as Spreadsheets, Accounting, Communications and Document management. At the heart of the model is the concept of splitting application functions between a client and a server processor.

The division of labor between the different processors enables the application designer to place an application function on the processor that is most appropriate for that function.

This lets the software designer optimize the use of processors--providing the greatest possible return on investment for the hardware. The user often does not know where a specific operation is executing.

The entire function may execute in either the PC or server, or the function may be split between them. This masking of application function locations enables system implementers to upgrade portions of a system over time with a minimum disruption of application operations, while protecting the investment in existing hardware and software.

Open System Interconnection OSI reference model has become an International standard and serves as a guide for networking. This model is the best known and most widely used guide to describe networking environments. Vendors design network products based on the specifications of the OSI model.

It provides a description of how network hardware and software work together in a layered fashion to make communications possible. It also helps with trouble shooting by providing a frame of reference that describes how components are supposed to function.

There are seven to get familiar with and these are the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and the application layer. Physical Layer, is just that the physical parts of the network such as wires, cables, and there media along with the length.

Also this layer takes note of the electrical signals that transmit data throughout system. Data Link Layer, this layer is where we actually assign meaning to the electrical signals in the network. The layer also determines the size and format of data sent to printers, and other devices.Web Programming – HTML and CSS Basics June 30, 3 / 49 Hypertext Markup Language (HTML) Initial official proposed description of HTML.

Video created by Duke University for the course "Programming Foundations with JavaScript, HTML and CSS". In this module, you will learn the basics of HTML and CSS to design a web page. Over the course of the module you will build your first web. So, you want to follow along some of my Flash lessons?

Get 7 days of free unlimited access to plombier-nemours.com Follow that link and get 1 week of access, see how you like it. Most sane people have a fear of animating walk cycles. In this course you'll learn the basics of HTML, CSS and responsive web plombier-nemours.comhout the course, you'll be building a professional looking company website, designed for both desktop computer and mobile phones..

This is a complete re-make of our hugely popular course created in and taken by over 40, students “Programming for Entrepreneurs - HTML and CSS”. Basic Networking Tutorial - a network is any collection of independent computers that communicate with one another over a shared network medium.A computer network is a collection of two or more connected computers.

When these computers are joined in a network, people can share files and peripherals such as modems, printers, tape backup drives, or CD-ROM drives. This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available.

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