The Kad network is a peer-to-peer (P2P) network which implements the Kademlia P2P overlay protocol^{[citation needed]}. The majority of users on the Kad Network are also connected to servers on the eDonkey network, and Kad Network clients typically query known nodes on the eDonkey network in order to find an initial node on the Kad network.

The Kad network uses an UDP-based protocol to:

Note that the Kad network is not used to actually transfer files across the P2P network. Instead, when a file transfer is initiated, clients connect directly to each other (using the standard public IP network). This traffic is susceptible to blocking/shaping/tracking by your ISP or any other opportunistic middle-man.

As with all decentralized networks, the Kad network requires no official or common servers. As such, it cannot be disabled by shutting down a given subset of key nodes. While the decentralization of the network prevents a simple shut-down, traffic analysis and deep packet inspection will more readily identify the traffic as P2P due to the high variable-destination packet throughput. The large packet volume typically causes a reduction in available CPU and/or network resources usually associated with P2P traffic.

A kraj (plural: kraje) is the highest-level administrative unit in the Czech Republic and Slovak Republic. For lack of other English expressions, the Slavic term is often translated as "province", "region", or "territory", although it actually approximately means "(part of) country", or "(part of) countryside". A kraj is subdivided into okresy ("counties").

The first kraje were created in the Kingdom of Bohemia during the reign of Charles IV in the 14th century and they lasted till 1862/68. Kraje were reintroduced in 1949 in Czechoslovakia and still exist today (except for the early 1990s) in the its successor states despite many rearrangements.

In Russia nine of the 83 federal subjects are called krais (края, kraya), coequal to oblasts. The toponym Krajina refers to several historical regions in Slavic countries.

Data ( /ˈdeɪtə/ DAY-tə, /ˈdætə/ DA-tə, or /ˈdɑːtə/ DAH-tə) are values of qualitative or quantitative variables, belonging to a set of items. Data in computing (or data processing) are often represented by a combination of items organized in rows and multiple variables organized in columns. Data are typically the results of measurements and can be visualised using graphs or images. Data as an abstract concept can be viewed as the lowest level of abstraction from which information and then knowledge are derived. Raw data, i.e., unprocessed data, refers to a collection of numbers, characters and is a relative term; data processing commonly occurs by stages, and the "processed data" from one stage may be considered the "raw data" of the next. Field data refers to raw data collected in an uncontrolled in situ environment. Experimental data refers to data generated within the context of a scientific investigation by observation and recording.

The word data is the plural of datum, neuter past participle of the Latin dare, "to give", hence "something given". In discussions of problems in geometry, mathematics, engineering, and so on, the terms givens and data are used interchangeably. Such usage is the origin of data as a concept in computer science or data processing: data are numbers, words, images, etc., accepted as they stand.