A client is a computer or a program that, as part of its operation, relies on sending a request to another program or a computer hardware or software that accesses a service made available by a server (which may or may not be located on another computer).[3] For example, web browsers are clients that connect to web servers and retrieve web pages for display.[3] Email clients retrieve email from mail servers. Online chat uses a variety of clients, which vary on the chat protocol being used. Multiplayer video games or online video games may run as a client on each computer.[3] The term "client" may also be applied to computers or devices that run the client software or users that use the client software.
The term was first applied to devices that were not capable of running their own stand-alone programs, but could interact with remote computers via a network. These computer terminals were clients of the time-sharing mainframe computer.
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A thick client, also known as a rich client or fat client, is a client that performs the bulk of any data processing operations itself, and does not necessarily rely on the server. The personal computer is a common example of a fat client, because of its relatively large set of features and capabilities and its light reliance upon a server. For example, a computer running an art program (such as Krita or Sketchup) that ultimately shares the result of its work on a network is a thick client. A computer that runs almost entirely as a standalone machine save to send or receive files via a network is by a standard called a workstation.
A thin client is a minimal sort of client. Thin clients use the resources of the host computer. A thin client generally only presents processed data provided by an application server, which performs the bulk of any required data processing. A device using web application (such as Office Web Apps) is a thin client.[4]
A diskless node is a mixture of the above two client models. Similar to a fat client, it processes locally, but relies on the server for storing persistent data. This approach offers features from both the fat client (multimedia support, high performance) and the thin client (high manageability, flexibility). A device running an online version of the video game Diablo III is an example of diskless node.
Used in home and corporate networks, a client is any computer hardware or software device that requests access to a service provided by a server. Clients are typically seen as the requesting program or user in a client-server architecture. Client end-user devices typically include desktop computers, laptops and smartphones.
In a client-server architecture, clients interact with servers by making requests for data or resources that the client is not capable of providing. Clients and servers can be located in different areas and connect via a network. They can also be located on the same machine and connect by interprocess communications.
A distributed application framework divides tasks between servers and clients. Tasks that can be completed by the client are typically referred to as client-side, while tasks completed by a server are referred to as server-side.
Servers typically provide resources such as files, data, internet access, external storage or processing power. The server puts one or more programs in charge of distributing those services to requesting clients.
Clients and servers communicate in a request-response messaging pattern defined by a communication protocol, such as Transmission Control Protocol/Internet Protocol (TCP/IP). The protocol defines the language and dialog patterns used. TCP, for example, maintains a connection between client and server until the end of a message exchange. TCP also determines how to distribute application data, transfers and receives packets, and manages any dropped packets. If a server receives a large number of requests at once, the requests are organized in a scheduling system based on priority. With client access control tools, a user can manage access to servers.
A server, for example, could be an Application Server, a separate computer, a database server or a web server. When a program or device does not have the resources to complete an operation, it will act as a client, making a request to a server, and that operation will happen server-side.
Examples of client-server relationships include web, file and mail servers. A web browser is essentially a client that requests pages from servers all over the web. The browser is the client that sends requests while a server in another location returns the Hypertext Markup Language (HTML) file. The computer that handles the request and sends back the HTML file is a server.
File Transfer Protocol is a client-server network protocol that is used to transmit files between computers over TCP/IP connections. The client-server protocol relies on two communications channels between the client and server -- a command channel for controlling the conversation and a data channel for transmitting file content.
Client libraries make it easier to accessGoogle Cloud APIs from a supported language. While you can use Google Cloud APIs directlyby making raw requests to the server, client libraries provide simplificationsthat significantly reduce the amount of code you need to write.
This document explains the different types of client libraries that Googleprovides for Cloud APIs. You can also find out more about the availablelibraries for your product or language of choice in the product or language'sdocumentation.
A few Google Cloud APIs don't have Cloud Client Libraries available in alllanguages. If you want to use one of these APIs and there is noCloud Client Library for your preferred language, you can still use the previousstyle of client library, calledGoogle API Client Libraries.You might also use these libraries if you're upgrading a project that alreadyuses them. These libraries:
Firebase is the Google-wide solution for building applications on mobiledevices. It offers an SDK with client code that lets you access mobile-relevantCloud APIs from iOS, Android, and Web apps. For information on the supportedCloud APIs and how to get started with Firebase, see theFirebase documentation.
All Cloud APIs expose a simple traditional JSON/REST interface. If you need towrite your own custom code to directly access the REST API using a third-partyHTTP client library, you can find out more about how Cloud APIs work withdifferent HTTP versions and implementations in theHTTP Guidelines.
gRPC is a language-neutral, platform-neutral, open source, remote procedure call(RPC) system initially developed at Google. You can find out about it atgrpc.io.gRPC-enabled Cloud APIs generally have both REST and RPC interfaces, so ratherthan just using JSON over HTTP to talk to the REST interface, gRPC-enabled APIclients can also useprotocol buffers and gRPC over HTTP2 to talk to the RPC interface. You can find out if an API isgRPC-enabled by checking its APIs and Reference section.
If a Cloud API is gRPC-enabled, you can generate your own gRPC client librariesfor it in any gRPC-supported language. To do this, you'll need the API'sprotocol buffers service definition (typically available fromthe repository on GitHub).You can then follow the instructions for your preferred language ongrpc.io to generate and use your client.
The Client interface represents an executable context such as a Worker, or a SharedWorker. Window clients are represented by the more-specific WindowClient. You can get Client/WindowClient objects from methods such as Clients.matchAll() and Clients.get().
To use KMS, you need to have a KMS host available on your local network. Computers that activate with a KMS host need to have a specific product key. This key is sometimes referred to as the KMS client key, but it's formally known as a Microsoft Generic Volume License Key (GVLK). Computers that are running volume licensing editions of Windows Server and Windows client are, by default, KMS clients with no extra configuration needed as the relevant GVLK is already there.
If you want to activate Windows without a KMS host available and outside of a volume-activation scenario (for example, you're trying to activate a retail version of Windows client), these keys won't work. You will need to use another method of activating Windows, such as using a MAK, or purchasing a retail license. Get help to find your Windows product key and learn about genuine versions of Windows.
If you're converting a computer from a KMS host, MAK, or retail edition of Windows to a KMS client, install the applicable product key (GVLK) from the list in this article. To install a client product key, open an administrative command prompt on the client, and run the following command and then press Enter:
Human-readable Client Metadata values and Client Metadata values that reference human-readable values MAY be represented in multiple languages and scripts. For example, values such as client_name, tos_uri, policy_uri, logo_uri, and client_uri might have multiple locale-specific values in some Client registrations.
Upon successful registration, the Client Registration Endpoint returns the newly created Client Identifier and, if applicable, a Client Secret, along with all registered Metadata about this Client, including any fields provisioned by the Authorization Server itself. The Authorization Server MAY reject or replace any of the Client's requested field values,other than the redirect_uris value,and substitute them with suitable values. If this happens, the Authorization Server MUST include these fields in the response to the Client.An Authorization Server MAY ignore values provided by the clientand MUST ignore any fields sent by the Client that it does not understand. 0852c4b9a8
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