Question 1
Packet Switching
Todays computer communication networks argon based on a technology called packet switching. This technology, which arose from DARPA-sponsored look into in the 1960s, is fundamentally different from the technology that was then utilize by the teleph whizz re chief(prenominal)s (which was based on overlap switching) or by the military messaging system (which was based on message switching).
In a packet switching system, data to be communicated is broken into delicate chunks that argon labeled to show where they come from and where they are to go, rather like postcards in the postal system. Like postcards, packets have a maximum length and are not necessarily reliable. Packets are forwarded from one computer to another until they arrive at their destination. If whatsoever are lost, they are re-sent by the originator. The recipient acknowledges receipt of packets to snuff out unnecessary re-transmissions.
TCP/IP
Abbreviation of Transmission Control communications protocol/Internet Protocol, and pronounced as separate letters. TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with the routing of data packets, TCP enables two hosts to establish a connection and exchange streams of data.
TCP guarantees delivery of data and similarly guarantees that packets will be delivered in the same order in which they were sent.
HTTP
HyperText Transfer Protocol, the underlying protocol used by the orb Wide weave. HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands. For example, when you enter a URL in your browser, this actually sends an HTTP command to the Web server say it to fetch and transmit the requested Web page.
The other main standard that controls how the World Wide Web works is HTML, which covers how Web pages are formatted and displayed.
HTTP is called a stateless protocol because each command is executed independently, without...If you want to get a secure essay, order it on our website: Orderessay
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