Client-server is a relationship in which one program (the client) requests a service or resource from another program (the server).At the turn of the last century, the label client-server was used to distinguish distributed computing by personal computers from the monolithic, centralized computing model used by mainframes.
The server software also formats the results of retrieval requests and sends the results back to the requesting client. What the server does. The server’s job is relatively simple and straightforward. All a server needs to do is read, interpret, and execute commands that come to it across the network from clients. Client-server provides an inter-process communication because it involves the exchange of . data from both the client and server whereby each of them performs different functions [3, 8]. The server process issues a USE command, followed by a READ command, awaiting input from the client process. The server must be listening before a client can establish a connection. The initial READ command completes when the client has opened the connection and sent some data. DHCP process: How the DHCP client and server communicate Automatic address assignment via the Dynamic Host Configuration Protocol proceeds in four consecutive steps: To begin, send the client a DHCPDISCOVER package with the target address 255.255.255.255 and the source address 0.0.0.0. The server is part of the client–server model; in this model, a server serves data for clients. The nature of communication between a client and server is request and response. This is in contrast with peer-to-peer model in which the relationship is on-demand reciprocation. In principle, any computerized process that can be used or called by Client-side cookies. Cookies contain session data about the client, including keys that the server can use to determine their login status and permissions/accesses to resources. Web servers wait for client request messages, process them when they arrive, and reply to the web browser with an HTTP Response message.
The process receives data from the client using recvfrom function and echoes the same data using the sendto() function. Please note that this server is capable of handles multiple clients automatically as UDP is a datagram based protocol hence no exclusive connection is required to a client in this case.
A server is an application or a process that responds to a client request. Many applications act as both a client and a server, depending on the situation. For example, a word processing application might act as a client in requesting a summary table of manufacturing costs from a spreadsheet application acting as a server.
The Basic Process Prev NEXT Let's say that you are sitting at your computer, surfing the Web, and you get a call from a friend who says, "I just read a great article!
Server responds by sending a Response in any form of formatted data, here also it could be XML or JSON. To Summarize: A Client and a Server establishes a connection using HTTP protocol. Once the connection is established, Client sends across the request to the Server in the form of XML or JSON which both entities (Client and Server) understand. It may be that only one host, client or server, can reach the other. In the middle is the round-trip section, where data is exchanged between the client and server using calls to send() and recv(). At the bottom, the client and server close() their respective sockets. The first available shared server process takes the request from the queue and processes it. Afterward, the shared server place the result into the dispatcher response queue. The dispatcher process monitors this queue and transmits the result to the client. Like a dedicated server process, a shared server process has its own PGA. A server is an application or a process that responds to a client request. Many applications act as both a client and a server, depending on the situation. For example, a word processing application might act as a client in requesting a summary table of manufacturing costs from a spreadsheet application acting as a server.
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