Tuesday 22 March 2011

S2W9 Monday: Basic Guide to IP, State of Net, Internet Speeds/Costs, Updating, Monitoring, Quiz

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1. Basic guide to the Net


The web’s place in our daily lives is undeniable. We can now access the Internet from our home computers, office, laptops and our phones. But even with this close intimacy many people still aren’t entirely sure what the Internet is and how it really works. Have a read of the PDF below which covers all the basics:

Guide to the Internet 

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2. State of the Internet

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3. Internet Speed & Cost 
Around the World


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4. Updates

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5. Facebook Cuts Monitoring Costs 

‘Facebook’ Program Dramatically Cut Agency’s Costs:





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6. The State of Internet TV




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8. Online Package Tracking


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9. Video Game Stats


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7. End of Term Review Quiz


All good things must come to an end, and this term is almost over. For this reason we will do a brief end of term quiz today that covers the materials we have looked at over the past two and a half months. Take the opportunity today to start reviewing the materials. Some questions will be those covered in the previous quizzes, while some will be drawn from the information I have provided you via the class posts. If you would like to take a copy of the quizzes on your thumb drive, they are all available on the Secondary drive under 
Curriculum/Computing/WebDesign Quizzes


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3. Hosted Website Project 
If we have time we'll contune with the hosted website projects. We will present these in the first week back at school after the holidays - so make sure you work on them today and Friday you will be given time too.


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Sunday 20 March 2011

S2W9 Monday: A Look at IE9, Visualising Radiation, Zune, Subscriptions, Static IP Addresses, Social Media, Photo edit, Review

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1. Firefox vs IE9: Face Off

Noting that according to Net Applications, Internet Explorer's share fell to 56% in January 2011, the BBC  quoted Microsoft's claims that Internet Explorer 9 is "playing catch up, but it leapfrogs everything" and "you are seeing innovation after innovation that other folks are catching up to." 
IE 9 Logo
In The Register, Tim Anderson said Internet Explorer 9 was Microsoft's answer to the fall in Internet Explorer's market share (from 68.5% in July 2008 to 46% in January 2011, according to StatCounter). He felt it was "fast and polished", a "remarkable improvement" over version 8, noting "superb" development tools and "real and significant" support for HTML5, though "not as comprehensive as the company's publicity implies." 

However, configuration options are "strewn all over the user interface", and the "distinctive and excellent" ActiveX filtering and Tracking Protection features might be "perplexing for less technical users." Having reached release candidate status eleven months after it was originally announced at the March 2010 MIX conference, "Microsoft's development process is too slow." The new version is "a good modern browser" but "the competition is moving faster." 

Which is the better browser? What does IE9 offer. Is it really that fast. Let's have a look; at first blush the striped-down IE9 is a definite head nod to the success of Google Chrome's minimalist interface. The menus have disappeared:


So let's see a head-to-head:




Please leave a comment to explain which browser you use and why. Have you tried many. What is most important to you?

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2. Visualising Radiation


It is very difficult for us to grasp differences in amounts across scales. Some smart individuals have come up with graphics to help us visualise our exposure to radiation. It helps put the exposure in Japan into context. Firstly, a fantastic chart outlining how much radiation exposure is actually occurring in your daily life:


Here a slightly more in-depth breakdown of the same data:


Finally, a table that quickly explains radiation doses and their actual effects on the human body including increased risk of cancer:


 
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3. Bye Zune


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4. Cancelling subscriptions



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5. Purpose of a Static IP Address


In home networks, IP addresses aren’t usually fixed, but they do fall within specific ranges. Your router will assign a new IP address automatically if another computer joins the network, or if your configuration changes. For the most part, this works out just fine – you shouldn’t notice a difference to your Internet performance or application functionality if your IP changes.


 
A static IP address however, is one that doesn’t change. Your computer decides upon the address it wants, and it tells the router. Why would you want to set up something like this though, and what are the advantages and disadvantages of doing so? Is there a better solution? Have a read of this article about the hows and whys:

http://www.makeuseof.com/tag/static-ip-address-advantages-disadvantages/



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6. Social Media Explained


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7. Harmony Day Photo Edit

Take the opportunity to edit a Harmony Day photo or Crazy Hair Day photo. The photos are located on the Secondary drive under Photos/Harmony Day and Photos/Harmony Day 2.



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7. End of Term Review Quiz


We will do and end of term quiz on Wednesday that covers the materials we have looked at over the past two and a half months. Take the opportunity today to start reviewing the materials. Some questions will be those covered in the previous quizzes. If you would like to take a copy of the quizzes on your thumb drive, they are all available on the Secondary drive under Photos/Harmony Day and Photos/Harmony Day 2.
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Thursday 17 March 2011

S2W8 Friday: Harmony Day Quiz, Quiz Review, Web Site Project

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1. Harmony Day Quizzes



Let's check out your knowledge of the world flags:




Let's check your knowledge of Australia:



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2. Homework Review


Let's review the quiz.
 
 
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3. Hosted Website Project 
 
If we have time we'll contune with the hosted website projects.
 
 

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4. Faster Computing 
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4. Identity Theft 

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Tuesday 15 March 2011

S2W8 Wednesday: Quake, Facebook Truth, Piracy, Password. Professor Teaches

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1. The Quake & the Net


The net continues to play a decisive role in post-quake Japan. Many residents returned home on Friday to find their houses without gas, electricity and phone lines, however, the Internet was still working and people used it and portable radios to keep up to date with unfolding events:




Some of the repercussions of the quake will be felt globally such as in the stock markets or certain products which Japan specialises in, for example, memory chips:
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2. IP Port Review


Understanding conceptually the way computers communicate is crucial to understanding how our global network was conctructed. Each layer of complexity has built on the next to allow what you experience today - an essentially seamless experience of multimedia web browsing tand the automation of complex technical tasks via the Internet, for example, video conferencing, mass online gaming, etc. All of this is made possible by the infinitely flexible architecture of the Intenet. It is important to remember that this, the most complex technical creation ever made by man, was designed to be redundant, inefficient and allow for unreliable communications.

Review this article again briefly:



 Here is the list of all the TCP and UDP port numbers:
and here is the list of network protocols


Today I'd like us to review the TCP and UDP ports. I'd also like you to choose a network protocol and write a brief comment on what it does. One example is the port for DNS (Domain Naming Service) is port 53. It functions roughly as outlined below:
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3. Professor Teaches HTML
  
We will do a brief quiz today on the Professor Teaches HTML Advanced More Advanced Techniques. Please work through the chapter. We will do the quiz once everyone is finished the chapter. Questions will be drawn solely from the content of Chapter on More Advanced Techniques.

 
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4. Gaming




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5. Life Lessons
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Sunday 13 March 2011

SWW9 Monday: Earthquake, IP Ports, IP Stack, Onion Routing, Professor Teaches.

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1. Earthquake and Earth's Rotation



As if to confirm my statement from Friday, the earth promptly moved slightly on its axis:

"The 8.9-magnitude earthquake shifted the Earth's rotation axis by about 25 centimetres, which could literally change time."

Quake shifted rotation of the Earth

What will happen with the reactors?




The web is playing a crucial role as in previous disasters:



People turn to the web in crises including current Japan quake and tsunami disaster 




Details on how plate tectonics work:










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2. IP Stack &
Networking Ports


Understanding conceptually the way computers communicate is crucial to understanding how our global network was conctructed. Each layer of complexity has built on the next to allow what you experience today - an essentially seamless experience of multimedia web browsing tand the automation of complex technical tasks via the Internet, for example, video conferencing, mass online gaming, etc. All of this is made possible by the infinitely flexible architecture of the Intenet. It is important to remember that this, the most complex technical creation ever made by man, was designed to be redundant, inefficient and allow for unreliable communications.

What was science fiction as little as 80 years ago is ubitquituous and banal for us today. Start to learn how this network came about by reading through this article:



 Here is a list of all the Tcp and UDP port numbers, it's staggering:


This is a list of Internet socket port numbers used by protocols of the Transport Layer of the Internet Protocol Suite for the establishment of host-to-host communications.  Originally, these port numbers were used by the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP), but are used also for the Stream Control Transmission Protocol (SCTP), and the Datagram Congestion Control Protocol (DCCP). SCTP and DCCP services usually use a port number that matches the service of the corresponding TCP or UDP implementation if they exist.  The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses.[1] However, many unofficial uses of both well-known and registered port numbers occur in practice.
 
But what at first seems bewildering is actually decypherable. Please choose one TCP or UDP port, research it and leave then leave a brief comment on what it does. Here is a list to choose from:


Port 21 –> TCP –> FTP (File Transfer Protocol)
Port 22 –> TCP/UDP –> SSH (ssh,scp copy or sftp)
Port 23 –> TCP/UDP –> Telnet
Port 25 –> TCP/UDP –> SMTP (for sending outgoing emails)
Port 43 –> TCP –> WHOIS function
Port 53 –> TCP/UDP –> DNS Server (DNS lookup uses UDP and Zone transfers use TCP)
Port 70 –> TCP –> Gopher Protocol
Port 110 –> TCP –> POP3 (for receiving email)
Port 119 –> TCP –> NNTP (Network News Transfer Protocol)
Port 143 –> TCP/UDP –> IMAP4 Protocol (for email service)
Port 194 –> TCP –> IRC
Port 389 –> TCP/UDP –> LDAP (light weight directory access)
Port 443 –> TCP –> Secure HTTP over SSL (https)
Port 465 –> TCP –> Secure SMTP (email) using SSL
Port 990 –> TCP/UDP –> Secure FTP using SSL
Port 993 –> TCP –> Secure IMAP protocol over SSL (for emails)
Port 1433 –> TCP/UDP –> Microsoft SQL server port
Port 2096 –> TCP –> Cpanel secure webmail over SSL
Port 2222 –> TCP –> DirectAdmin Server Control Panel
Port 3306 –> TCP/UDP –> MySQL Database Server
Port 8080 –> TCP –> HTTP port (alternative one for port 80)

Here are some of the ports used by trojans:

http://www.chebucto.ns.ca/~rakerman/trojan-port-table.html
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4. The Onion Router or TOR


TOR: The Onion Router 


Have a look at the wiki article:

Tor (anonymity network)













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5. Professor Teaches HTML
  
We will do a brief quiz Wednesday on the Professor Teaches HTML Advanced More Advanced Techniques. Please work through the chapter. We will do the quiz once everyone is finished the chapter on Wednesday. Questions will be drawn solely from the content of Chapter on More Advanced Techniques.

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