unit 28 week 10

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Advanced Web Architecture(And creating your site!)


Objectives• Develop depth of understanding of

web architecture• Develop a website with a range of

techniques


Creating Your Site• You now have all the skills you need

to create most of your site• Remember that there must be a

minimum of 6 pages• Remember to follow your design and

also the priorities you set out in your Gannt Chart – but it’s OK to be ahead of schedule!


Assignment 6• This assignment only covers Merit

and Distinction marks• Only pay attention to this if you plan

on getting these marks!• This assignment follows on from A1

in developing more advanced knowledge of how the Web works


Tasks• Although this seems backwards, it will

help focus our learning• There are 4 tasks – 3 more posters• 2 are explaining how web browsers

and email work (M1)• 1 is about tech buzzwords(M1)• Also a written report on how TCP/IP

works (1)


Posters• These posters will take about an hour

each, if the first few weeks are anything to go by• Split your time in lesson between these

and making the website• You will probably need to work on the

posters & report at home!• It’s fine to make sure the website is

finished before the posters!


1: How Web Browsers Work• A diagram would be appropriate• Some explanation of key words is

important too


1: User types domain name into browser

2: The browser sends a request for the IP address of the domain name of the URL to a DNS server

3: The DNS server returns the ‘real address’ – the IP address

2

3

4: The Browser sends a request to the IP address for the file in the URL

4

5

5: The Web server returns the data contained in that file

6: The Browser requests any other files (e.g. images, css) needed for the web page7: The Web server returns the data for those files


HTTP• Hyper Text Transfer Protocol• A standard way for browsers and

webservers to communicate with each other• A protocol is a list of instructions that

both understand


HTTPS• HTTP using SSL – Secure Socket Layer• An extra step in each communication with

the server that means data sent in both directions is encrypted• E.g. when you log in to your bank account

online, both your password and the webpage with your bank details are encrypted so if the data is captured between server and browser it is secure


TCP/IP• A collection of protocols that allow

computers and applications running on those computers to communicate with each other without needing to know how they are connected• This means it is platform independent – it

allows any computing device to communicate with any other computing device


TCP/IP


1: Email written in email client software, then press send 2: Email sent to own

SMTP server (with a to: address)

3: SMTP server sends email to the server in the address

4: Destination server holds the email until the recipient checks mail

2

3

4

5: recipient’s email client software downloads email from POP3 or IMAP server to read it


Email Protocols• SMTP: Simple Mail Transfer Protocol –

for sending emails• POP3: Post Office Protocol version 3 –

stores emails until they are downloaded onto your computer by client software• IMAP: Internet Message Access Protocol

– stores emails until you’ve read them – client software keeps a copy


Buzzwords• Web 2.0• Social Networking• Blogging• Cloud Computing• Content Management Systems (CMS)• Do your own research to find out

more about these technologies!


Posters• These posters will take about an hour

each, if the first few weeks are anything to go by• Split your time in lesson between these

and making the website• You will probably need to work on the

posters & report at home!• It’s fine to make sure the website is

finished before the posters!

unit 28 week 10

Education

web server

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ip address

browser sends

posters amp

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server