Tutorial(1) - 9th MAY. 2014

1) The HTTP is an application protocol for distributed, collaborative systems. HTTP is the foundation of data communication for the World Wide Web. Https is “Hyper Text Transfer Protocol” with Secure Sockets Layer, another protocol primarily developed with secure, safe Internet transactions in mind.

2) Packet-switched networks move data in separate, small blocks -- packets -- based on the destination address in each packet. When received, packets are reassembled in the proper sequence to make up the message.On the Internet, the network breaks an e-mail message into parts of a certain size in bytes. These are the packets. Each packet carries the information that will help it get to its destination -- the sender's IP address, the intended receiver's IP address, something that tells the network how many packets this e-mail message has been broken into and the number of this particular packet. The packets carry the data in the protocols that the Internet uses: Transmission Control Protocol/Internet Protocol (TCP/IP). Each packet contains part of the body of your message. A typical packet contains perhaps 1,000 or 1,500 bytes.Each packet is then sent off to its destination by the best available route ,a route that might be taken by all the other packets in the message or by none of the other packets in the message. This makes the network more efficient.

3) 3G is shorthand for “3rd generation,” and refers to a networking standard in cell phone technology that is capable of providing high-speed data service to mobile devices.

While 4G stands for 4th generation, which is more faster than the 3g, Using a 4G smartphone on Verizon’s 4G LTE network means you can download files from the Internet up to 10 times faster than with 3G.

Limitation - 3G- Roaming and data/voice work together has not yet been implemented.         

                    -4G-The risk of receiving a virus attack and tracking cookies through this IP-address system increases by 4G.

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