Full Form of DPI:
Dots Per Inch
DPI Full Form is Dots Per Inch. DPI is basically used to measure printer resolution. It is also commonly used in association with other terms such as scanners, monitors, digital cameras, etc. DPI, however, technically indicates Printer Dots Per Inch. This, in turn, denotes the capability of the printer to produce the graphics on a printed page. If DPI is high, the text or printed image would be more refined.
For standard printers, the high resolution could be a minimum of 600. For digital printers and color printers, the resolution is even higher. DPI for monitor resolution actually is PPI or Pixel Per Inch, as monitors have pixels and not dots. Though in real terms it is PPI for monitors, DPI has been used as the common representation. Similar to printers, more number of pixels gives out more detailed version of the image or picture.
DPI Full Form – Deep Packet Inspection
Full Form of DPI is Deep Packet Inspection. DPI is a kind of computer network packet filtering which conducts an examination of the data part of a packet when it crosses an inspection point while searching for non-compliance with protocol, spam, intrusions, viruses, or for the collection of statistical information, etc. There are many headers for the IP packets and the network equipment requires only the use of the first three of these for the purposes of normal operation. However, the use of second header (like UDP or TCP) is ordinarily regarded to be, what is usually known as stateful packet inspection.
There are multifold ways in which packets can be acquired for deep packet inspection and one common method is port mirroring, which is sometimes known as Span Port. Another method for this purpose is Optical Splitter. DPI allows advanced management of network, security functions, and user service as well as internet eavesdropping, data mining, internet censorship among many other things. DPI technology has been made use of the management of Internet for years but proponents of net neutrality allege that such technology can hamper the growth of an open internet environment.
For the purposes of securing networks, Internet Service Providers often utilize this technology on their public networks available to consumers. Some of the common applications of DPIs are in policy definition, lawful interception, targeted advertising, the offering of tiered services, copyright enforcement, and policy enforcement.
DPI has been extensively employed by countries and their intelligence agencies for the purposes of monitoring criminal activities across the internet. For example, the Chinese Government makes use of DPI for monitoring and censoring network traffic that it considers harmful to the State and its citizens such as pornography, political dissent, religious information, etc. Contents such as Tibetan and Taiwanese independence have been censored in China.