Thursday, May 24, 2012

Usin FrontPages to create a Webpage

Visit the site below and work through the tutorial. The tutorial includes some simple exercises that assist you in creating a simple website. As you complete the tutorial answer the questions below.


1. What two steps are recommended in planning your site?
Establish a goal and keep it simple
Know your audience

2. What is a web server?
A Web server is a computer that runs special serving software. That software "serves" HTML pages and assosciated files when requestes by a client, such as a Web browser.

3. Provide examples of some features that FrontPage Server Extensions provide for a website?
- Graphics
- Documents
- Multimedia

4. How do you put your website on a web server?
-To put your site on a Web server, you publish it
-Publishing generally means copying all of the files to a remote location on a server
-Mostly, the remote location is either a HTTP or an FTP path

5. FrontPage has two key functions – website design and …..?
Management

6. What are some commonly used file names for Home Pages accepted by servers?
Defult.html
Index.html
Index.htm

 7. What is FrontPage Metadata and which two folders contain these files?
FrontPage metadata is information about your FrontPage Web site that makes managing the site possible.
-the_vti_cnf folder and the_vti_pvt folder



8. There are two basic types of website can you create in FrontPage; what are they and how do they differ?
Disk-based: A site you create on your local hard drive. After you design and work on the site, you can later publish it to a remote location like a Web server.

Server-based: A site you create and work with directly on a Web server.

Tuesday, May 22, 2012

Computing anywhere, anytime!

What is meant by a netbook? What is the “cloud” in cloud computing.
Netbook- is a small, lightweight laptop computer used especially for Internet access and e-mail.

Cloud Computing- a networked computer system that harnesses the resources of several servers to complete tasks and store data.
What applications does Google docs offer online?
-offers a suite of Web-based productivity applications
-offer cloud computing services
- offers critical security features specifically designed to keep data safe and secure
- enables the users to have control over data; who its shared with and how it should be shared
- all data is automatically saved in the cloud
- have access to all sites and documents
- create an invoice template in Google Docs
http://computer.howstuffworks.com/internet/basics/google-docs.htm

Why would you want your documents stored in the “cloud” (online)?
- It makes it easy for you to sync files across devices
- provides storage space to hold all digital property
- ecrypts the data while its travelling back and forth making it impossible for anyone to read it if captured
- not always immune to search and seizure
http://www.readwriteweb.com/archives/how_to_store_your_files_in_the_cloud.php

Monday, May 21, 2012

Protocols "How to Play Nice"

Where protocols can be used

TCP
- is used for transmission of data from an application to the network.
- breaks data down into IP packets before they are sent, and assemble the packets when they arrive.

IP
- takes care of the communication with other computers.
- sends and receives data packets over the Internet.


HTTP
- communication between a web server and a web browser.
- send requests from a browser to a web server, returning web pages from the server back to the client.


SMTP (simple mail transfer protocol)
- transmission of e-mails.


FTP (File transfer protocol)
- transmission of files between computers.

HTML
- Hypertext Markup Language and is the computer language used to design web pages.

Friday, May 18, 2012

Broadband Speedtest

For a bit of fun determine the speed of our internet connection using the site below. Start by testing the connection speed to the Sydney location then select a different location from the map (drag the map to find a location).

Home Computer = 0.50 Mbps

1. What is meant by upload and download speeds?
Uploading involves sending a copy of a file from a computer to a remote network connection; for instance, Web developers and publishers upload files to their Web server to make them available for other people to access.

Downloading involves the reception of a file that has been uploaded to a remote network. Often this refers to a person copying a file from a remote network to her personal computer; for example, people download music from iTunes after they make a purchase.
Upload speed is usually slower than download speed because Internet providers have designed their systems to optimize download speeds. This is because most Internet users spend more time downloading than uploading. In other words, Internet providers give priority to downloading since it's more frequently done than uploading
2. What are the units used to measure download speeds?
Mbps (mega bits per second) or Kbps (Kilo bits per second)

3. Why do different locations offer different download speeds? Hint: “bottleneck”
There are various reasons for different speeds:
- cables, they type of material used,optic fibre- copper wire-whether the server is wireless
-crowds/No. of users eg townhouse
-Amount of data being uploaded/downloaded
-Bottleneck- Size of channels/branches
-The weather can affect some wireless channels
-Time of day
-Usage


'Bottlenecks' reduces the room data has to travel therefore reducing the speed it is transmitted at.


Tuesday, May 15, 2012

Internet Addresses

1. What is a URL?
Uniform (or universal) resource locator, the address of a World Wide Web page.

2. What is an IP address and how is it related to a URL?
The browser communicated with a name server to translate the server name "www.google.com.au" into an IP Address which it uses to connect to the server machine. The browser then formed a connection to the server at that IP address on port 80.

3. Given our school website's URL is http://www.mcauley.nsw.edu.au, what is our domain name and what protocol do you need to use to access the site?

Domain Name: mcauley.nsw.edu.au
Protocol: 'http' (hypertext transfer protocol)

4. In the context of an IP address, what is an octet?
IP stands for Internet protocol, and these addresses are 32-bit numbers, normally expressed as four "octets" in a "dotted decimal number." The four numbers in an IP address are called octets because they can have values between 0 and 255.

Friday, May 11, 2012

Some Key Terms


1. What is a protocol?
Rules about the method of communication between devices.

2. The following protocols are used for:

TCP/IP: The transmission control protocol or Internet protocol is the method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one IP address that uniquely identifies it from all other computers on the Internet. It is a connectionless protocol, which means that there is no continuing connection between the end points that are communicating.


 HTTP: Hypertect Transfer Protocol is the set of rules for transferring files (text, graphic images, sound, video, and other multimedia files) on the internet. HTTP concepts include the idea that files can contain references to other files.

SMTP: It is a TCP/IP protocol used in sending and receving mail. However it is limited in its ability to queue messages at the receiving end it is uaually combined with other protocols.

FTP: FTP is the acronym for File Transfer Protocol. As the name suggests, FTP is used to transfer files between computers on a network.

HTML: HTML is a computer language devised to allow website creation. These websites can then be viewed by anyone else connected to the Internet.

XML: Extensible Markup Language which allows users to define their own customized markup languages especially in order to display documents on the World Wide Web.



3. What does GUI stand for? Stands for "Graphical User Interface". It refers to the graphical interface of a computer that allows users to click and drag objects with a mouse instead of entering text at a command line. The graphical user interface was first introduced to the public by Apple with the Macintosh in 1984. However, the idea was actually taken from an earlier user interface developed by Xerox. Early dynamic information devices such as radar displays, where input devices were used for direct control of computer-created data, set the basis for later improvements of graphical interfaces.


4. There are two methods of data transmission – serial and parallel. Explain the difference between them. Serial transmits data one bit at a time as it only is connected by one wire whereas parallel transmits anything up to a byte at a time if connected by 8 wires.


5. Define the term “URL”. Explain the components that make up the url. Stands for "Uniform Resource Locator". A URL is the address of a specific Web site or file on the Internet. A URL is used when a Web client makes a request to a server for a resource. A URL for HTTP (or HTTPS) is normally made up of three or four components:

Stands for "Uniform Resource Locator". A URL is the address of a specific Web site or file on the Internet. A URL is used when a Web client makes a request to a server for a resource. A URL for HTTP (or HTTPS) is normally made up of three or four components:

1.    A scheme. The scheme identifies the protocol to be used to access the resource on the Internet. It can be HTTP (without SSL) or HTTPS (with SSL).

2.    A host. The host name identifies the host that holds the resource. For example, www.example.com.

Host names can also be followed by a port number. Well-known port numbers for a service are normally omitted from the URL. Most servers use the well-known port numbers for HTTP and HTTPS , so most HTTP URLs omit the port number.

3.    A path. The path identifies the specific resource within the host that the Web client wants to access.

4.    A query string. If a query string is used, it follows the path component, and provides a string of information that the resource can use for some purpose (for example, as parameters for a search or as data to be processed). The query string is usually a string of name and value pairs, for example, q=bluebird.

6. In the context of data transmission, what is “error detection”?

Error Detection= is a method that allows communication errors to be detected. The data is encoded so that the encoded data contains the additional information about the data. The data is the decoded so that its information matches the original allowing erorrs to be detected.


7. Why would error detection be important for the internet. To enhance the reliability of data storage.


8. Name and explain one common method of error detection. Parity Bit= This is a bit that is attached to a bit stream to make the total number of "1" bits in a given set of bits always even or odd. E.g. send specific sequence of ones and zeros and then count the number ones that have been sent and send an extra 1. If the counts of ones is an odd, adding the extra number makes it an even. The receiver can coutn up the number of one bits they received , perform the same calculations and if the result is not even, they will know that an error occured.


9. What is HTML and explain why it is important. HTML stands for Hyper Text Markup Language; HTML is not a programming language, it is a markup language. HTML is what formats web pages. It is used in conjunction with JavaScript and CSS to make the page you see. It is used to format the text, layout, images, links, etc. The combination of these three elements has come to be known as XHTML