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A common form of distributed system in which software is split between server tasks and client tasks. A client sends requests to a server, according to some protocol, asking for information or action, and the server responds.

This is analogous to a customer (client) who sends an order (request) on an order form to a supplier (server) who despatches the goods and an invoice (response). The order form and invoice are part of the "protocol" used to communicate in this case.

There may be either one centralised server or several distributed ones. This model allows clients and servers to be placed independently on nodes in a network, possibly on different hardware and operating systems appropriate to their function, e.g. fast server/cheap client.

Examples are the name-server/name-resolver relationship in DNS, the file-server/file-client relationship in NFS and the screen server/client application split in the X Window System.

Usenet newsgroup: news:comp.client-server.

["The Essential Client/Server Survival Guide", 2nd edition, 1996].
References in periodicals archive ?
We consider a 2-tier downlink HCN including MeNBs and SeNBs as described in Section 2.
annual partner awards is a consolidation of the top 2-Tier partners who were
Cisco's annual partner awards is a consolidation of the top 2-tier partners who were able to meet both the challenges of reskilling themselves in a short window of opportunity and delivering solutions successfully for their key customers.
Our theme for the partner event was focused around digital transformation, which we believe presents a high value opportunity for our 2-Tier channel partners now, and in the years ahead.
Of the 66 cases classified as "probable: EM + endemic exposure" that were reported to Nova Scotia public health professionals, 10 did not have any information about laboratory testing, 42 did not have serologic testing, and 14 had serologic test results that were negative by the 2-tier algorithm.
A combined reservation quota of two lower berths per coach earmarked in sleeper, AC 3-tier and 2-tier for this category, including pregnant women, may be expanded to four lower berths per coach.
Birst's patented analytics engine and 2-tier data architecture automatically unify combinations of data from multiple sources, including existing warehouses, and creates a user-ready data store.
We've got good schools, but we want to make them better and we believe that moving to 2-tier will be good for the pupils and the community.
It added that the issuance of these new types of instruments compares with the over P120 billion in legacy Basel 2-Tier 2 capital outstanding, which must be replaced eventually.
The simulation can be performed for different cell layouts such as 2-tier 3GPP (specifies standards encompassing Radio, Core Network and Service architecture) and 2-tier 3GPP2 (specifies standards based on CDMA 2000) with specific cell radii.
How do you plan to reach out to students in 2-tier and 3-tier cities, where Internet penetration is relatively low?