Tutorial 1

Hypertext Transfer Protocol (Http)

Hypertext Transfer Protocol means for the underlying protocol used by the World Wide Web. HTTP actually stand for how messages or information are formatted and transmitted from the browser to the Web servers in response to various commands. When we enter a HTTP command on a browser, it is actually

sending a command to the Web server to directly send or transmit the Web page that we request. We can also call HTTP as stateless protocol because each command is executed independently. 

Hypertext Transfer Protocol Secure (Https)

Hypertext Transfer Protocol Secure short form as (Https) is almost same as the Hypertext Transfer Protocol but it was secure by a socket layer call (SSL) for security purpose. Hypertext Transfer Protocol Secure is normally use for online banking or any investment website so that the client privacy will be protected. If someone was trying to capture others people credit card number or any private information  via HTTPS that he or she enter before, the data would send back to the SSL encryption and it would be unrecognizable. We can know that the website is using Hypertext Transfer Protocol Secure when the web address start with https://.

Packet-Switched Network

When we are request of some information through the browser, there are two type of transfer. The packet-switched Network is a more commonly use for data. The address information send from web server will break into many small packets and each packets will contain of the address information that the client request . When using Packet-Switched Network, the client's HTTP request will break down to small piece and transfer to ISP or Name server then transfer again to the Web server. The request will regroup and form a correct request and the web server will will send the HTML document back to ISP or name server. The HTML document will break down into small piece and send back to the client browser and recompiled back into the original data and message in correct sequence. Then the HTML document or any website will shown correctly.


Different between Cellular transmission 3G and 4G
3G is a digital broadband service that uses packet data transmission. this makes us to surf the Web and get the email on our cell phone quickly and easily. The 4G technology will actually 10 times faster than 3G. The Cellular transmission speeds have a lot of variables like the underlying technology, the carrier, the location of the cell tower,and the amount of congestion on the network. The 4G technology speed now is almost similar as DSL connection. The voice and data will be transmitted separately with 3G but transmitted together with 4G so 4G will be much faster response time.The 3G cellular transmission will become very slow after the usage of the client finish compare to 4G. The limitation of 3G is requires close base stations and very expensive. However, the limitation of 4G is the operation area.