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It comes from Latin. When translating the phrase word for word, it means &ldquo;for this&rdquo;.</p>\n<p>This phrase has other meanings as well. The first one is that you shouldn't assume that <strong>an answer to one problem can be applied to the same problem in a different context</strong>.</p>\n<p>The second meaning relates to <strong>software development</strong> where <strong>ad hoc is a solution created to handle a very specific issue</strong>.</p>\n<p>It&rsquo;s often used in situations when a group or committee is created for a specific purpose. For instance, the police department appointed an ad hoc committee for the case.</p>","level":"easy","meta_title":"What is Ad Hoc? 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Fetch.ai is a <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-blockchain/">blockchain-based artificial intelligence platform that uses AEAs to connect with other AI applications to process <strong>real-time data</strong> and take actions based on it.</p>\n<p>AEAs connect to IOTA Streams, allowing economic agents to act autonomously by sharing and retrieving real-time data. Financial markets that require <strong>taking fast actions</strong> for higher profits are one of the main spheres where AEAs are used.</p>\n<p>Note that autonomous economic agents aren&rsquo;t <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-smart-contract/">smart contracts</strong></a> or <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-api/">APIs. However, they autonomously follow some rules without any external input. Besides, developers can create their own AEAs on the blockchain.</p>\n<p>Though the <strong>term economic agent</strong> is usually used in different contexts. It typically refers to a person who engages in economic activity such as purchasing goods and services or selling financial assets. An economic agent, in a broader sense, is any person, group, or <strong>entity</strong> that makes decisions about the distribution of scarce resources.</p>\n<p>In recent years, however, the term has been expanded to include non-human agents such as <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-are-bots/">bots. Given its growing popularity in this context, it's worthwhile to <strong>dig deeper into the concept of an autonomous economic agent</strong>.</p>\n<p>An autonomous agent, in its most basic sense, means that the agent is capable to self-govern. In other words, it can control its own actions. Besides, since an autonomous agent is not subject to external control or supervision, it must have its own objectives that it pursues using self-generated means.</p>\n<p><strong>These features</strong> can be quickly recognized by professional economists as the cornerstones of any economic theory that deals with rational behavior by economic actors. The notion that all economic players are rational actors who <strong>follow their own personal interests</strong> without any external guidance or influence from outside sources is a basic premise in neo-classical economics.</p>","level":"medium","meta_title":"What is Autonomous Economic Agent (AEA)? 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Crypto Terms: Letter A

What is Application Layer?

Application Layer MEANING:
Application Layer - is the top layer of the seven-layered OSI model.
Hard
3 minutes

Let's find out Application Layer meaning, definition in crypto, what is Application Layer, and all other detailed facts.

The seventh layer of the OSI model is referred to as an application layer. Its primary functions include displaying incoming data to the user and providing a way for the user to submit information to be transmitted down to lower levels.

In addition, this layer offers interfaces and several other services to the user. It backs message handling systems, shared database management systems, transaction processing systems, and so on. Also, the application layer specifies a communication collaborator, such as a process or software program, as well as how it interacts with other applications.

Layers that are below the application layer include the physical layer, the data link layer, the network layer, the transport layer, the session layer, and the presentation layer.

Operations of the Application Layer

The application layer performs various functions. One of which is resource sharing which includes the layer offering an interface between the network and the application program for resource sharing. Thanks to this, users are able to share files, printers, databases, and other resources anywhere in the network.

Moreover, the application layer has an essential role in providing standardization across several sorts of networks. For instance, if a user utilizes two separate protocols and sends an electronic mail from one network to another network, the application layer on both sides transforms the information into a common format so that it can be easily comprehended by each side.

Another function worth mentioning is user support and information services that the layer provides. It includes various user support and information services like electronic mail, remote login, file transfer, multimedia conferencing, and database entry.

Note that application layer protocols require services from lower layers. These layers are able to solve the problems such as reliability, data integrity, duplicate delivery, sequencing, and timing.

Instances of Application Layer Protocols

The application layer protocols, indeed, have quite a few examples out there. It is closer to the end-user, enabling direct interactions between users and software.

A few of the examples of application layer protocols include:

  • DNS (Domain Name System)
  • DHCP (Dynamic Host Configuration Protocol)
  • HTTP (Hypertext Transfer Protocol)
  • FTP (File Transfer Protocol)
  • SMTP (SImple Transfer Protocol) 

DNS (Domain Name System) is a protocol or an action when users put a URL into the address bar of their browser, then the DNS documents linked with that domain switch the domain name to an IP address, which enables their browser to connect to the website they want to visit.

DHCP (Dynamic Host Configuration Protocol) is a protocol that is utilized by servers, routers, modems, and other network devices as a way of granting IP addresses automatically for devices linked to a network utilizing Transmission Control Protocol/Internet Protocol (TCP/IP).

HTTP (Hypertext Transfer Protocol) is a TCP/IP-based application layer protocol that transmits packets of data on top of Transmission Control Protocol (TCP) or User Datagram Protocol (UDP). It is a protocol utilized for sending multimedia files such as text, audio, and video between the customer and the server. It is accessible through the internet. Users can share data through World Wide Web pages.

FTP (File Transfer Protocol) is a protocol that allows transmitting files between the customer and the server applications over the internet, or other TCP/IP-based networks. FTP has been operating for decades, therefore, it is one of the oldest internet services.

SMTP (Simple Mail Transfer Protocol) is an application layer TCP/IP protocol used to transfer e-mails from one system to another across networks. It allows any machine with an internet connection to transmit e-mail messages to any other device with an e-mail address.