Internet

Internet

Internet can be defined as computer networks and the big wide world, which connects the user computer from a State to other countries around the world, which included a variety of information resources from a static to a dynamic and interactive.

a. Internet Protocol (IP)

Internet protocol designed for the interconnection of computer communication systems in packet switched networks. In general, this protocol is to handle detection errors during data transfer. For data communications, internet protocol implements two basic functions are addressing and fragmentation.

b. TCP

TCP is a protocol that is at the transport layer. The basic concept is the workings of TCP send and receive segment-segment length information and data with varying pasa a internet datagram. TCP guarantees reliability of communication links for doing repairs to the damaged data, lost or wrong send. Data sent in the session packet sequence. But the handling of data has been delayed.

c. UDP (User Datagram Protocol)

UDP, which is one of the main protocols over IP is the transport protocol that is simpler compared with TCP. UDP provides "best effort" (not reliable), not sequentially, so that the unicast or multicast UDP segments may be lost. Data is sent as a sequence of bytes (datagram) in one package only. Delivery of data very quickly, so the delay is only the propagation delay only. UDP is used in DNS, ICMP, VoIP, etc..

d. HTTP (Hyper Transport Transfer Protocol)

HTTP is the protocol for web applications that use TCP with the server port 80. Using 2-way communication, clientserver model.

• Client: browsers that do request and receive a web object.

• Server: a web server sends objects in response to client requests.

e. FTP (File Transport Protocol)

FTP allows sending packets / data securely between the client and server.

• Client: side that initiates transfer

• Server: remote host

Call the FTP client FTP server on port 21, use TCP as the transport protocol, then port 20 will also be opened for exchange of data.