Protocol It is the term used to refer to the set of rules, rules and guidelines that serve to guide a behavior or action. Net , for its part, is a kind of structure or system that has a certain pattern.
The concept of network protocol it is used in the context of the computing to name the regulations and criteria that determine how the various components of a certain interconnection system should be communicated. This means that, through this protocol, devices that are networked can exchange data .
Also know as communication protocol , the network protocol establishes the semantics and the syntax of information exchange, something that constitutes a standard. Networked computers, in this way, have to act according to the parameters and criteria established by the protocol in question in order to communicate with each other and to recover data that, for some reason, have not reached their destination.
Various information is included in the network protocol that is essential for the Connection . The protocol indicates how the physical connection is specified, establishes the way in which the communication should begin and end, determines how to act against corrupted data, protects the information against the attack of intruders, indicates the eventual closure of the transmission, etc.
There are network protocols in each cap or level of the connection. The lower layer refers to the physical connectivity that allows the development of the network (with UTP cables , radio waves , etc.), while the most advanced layer is linked to the applications used by the user of the computer (with protocols like HTTP , FTP , SMTP , POP and others).
He Hypertext Transfer Protocol It is used in all transactions that take place on the Internet, since it has the definition of semantics and syntax that servers, proxies and clients (all components of the web architecture) should use to establish communication between them. It is a transaction-oriented protocol and is supported by the "request-response" scheme, typical among a customer (also called user agent and it can be, for example, an Internet browser) and a server. The information transmitted in this process is called resource , identified through a URL (Uniform Resource Locator).
He File Transfer Protocol, meanwhile, is used when you want to send and receive files from one system to another, provided that both are based on the architecture client-server and that they are connected to a network that complies with the TCP , explained in the definition of communication protocol . FTP allows a user to connect to a server to download files or upload them, without the need for both computers to use the same operating system.
With a name less known than the previous two, the Protocol for simple mail transfer an incalculable amount of times a day is used by users around the world, since it shapes the exchange of messages email (also know as e-mail or e-mail) among a wide range of devices, such as mobile phones, tablets and computers. This is an official standard whose operation is in the hands of email service providers.
He Post Office Protocol or Post Office gives users the ability to receive and store email in a equipment local. Currently, the use of POP3, the most recent version, is preferred, since the first two are considered obsolete.