This article is about services provided by and to networked computers. For information about Internet connections, see Network service provider. For a hierarchical list of network services, see Category:Network service.
This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "Network service" – news · newspapers · books · scholar · JSTOR(April 2020)
[1]In computer networking, a network service is an application running at the network application layer and above, that provides data storage, manipulation, presentation, communication or other capability which is often implemented using a client–server or peer-to-peer architecture based on application layer network protocols.[1]
Each service is usually provided by a server component running on one or more computers (often a dedicated server computer offering multiple services) and accessed via a network by client components running on other devices. However, the client and server components can both be run on the same machine.
Clients and servers will often have a user interface, and sometimes other hardware associated with it.
Many Internet Protocol-based services are associated with a particular well-known port number which is standardized by the Internet technical governance.
For example, World-Wide-Web servers operate on port 80, and email relay servers usually listen on port 25.
TCP versus UDP
Different services use different packet transmission techniques.
In general, packets that must get through in the correct order, without loss, use TCP, whereas real time services where later packets are more important than older packets use UDP.
For example, file transfer requires complete accuracy and so is normally done using TCP, and audio conferencing is frequently done via UDP, where momentary glitches may not be noticed.
UDP lacks built-in network congestion avoidance and the protocols that use it must be extremely carefully designed to prevent network collapse.
^ ab. SDxCentral. 12 June 2015. Archived from the original on 12 June 2015. Retrieved 4 August 2019. Network Service – a capability that facilitates a network operation. It typically is provided by a server (which can be running one or more services), based on network protocols running at the application layer in the Open Systems Interconnection (OSI) model of the network.
^"X.225 : Information technology – Open Systems Interconnection – Connection-oriented Session protocol: Protocol specification". from the original on 1 February 2021. Retrieved 10 March 2023.
March 28, 2023
network, service, this, article, about, services, provided, networked, computers, information, about, internet, connections, provider, hierarchical, list, network, services, category, this, article, relies, largely, entirely, single, source, relevant, discussi. This article is about services provided by and to networked computers For information about Internet connections see Network service provider For a hierarchical list of network services see Category Network service This article relies largely or entirely on a single source Relevant discussion may be found on the talk page Please help improve this article by introducing citations to additional sources Find sources Network service news newspapers books scholar JSTOR April 2020 1 In computer networking a network service is an application running at the network application layer and above that provides data storage manipulation presentation communication or other capability which is often implemented using a client server or peer to peer architecture based on application layer network protocols 1 Each service is usually provided by a server component running on one or more computers often a dedicated server computer offering multiple services and accessed via a network by client components running on other devices However the client and server components can both be run on the same machine Clients and servers will often have a user interface and sometimes other hardware associated with it Contents 1 Examples 2 Application layer 2 1 TCP IP network services 2 1 1 Port numbers 2 2 TCP versus UDP 3 See also 4 ReferencesExamples EditExamples are the Domain Name System DNS which translates domain names to Internet protocol IP addresses and the Dynamic Host Configuration Protocol DHCP to assign networking configuration information to network hosts Authentication servers identify and authenticate users provide user account profiles and may log usage statistics E mail printing and distributed network file system services are common services on local area networks They require users to have permissions to access the shared resources Other network services include Directory services e Mail File sharing Instant messaging Online game Printing File server Voice over IP Video on demand Video telephony World Wide Web Simple Network Management Protocol Time service Wireless sensor networkApplication layer EditMain article Application layer In computer network programming the application layer is an abstraction layer reserved for communications protocols and methods designed for process to process communications across an Internet Protocol IP computer network Application layer protocols use the underlying transport layer protocols to establish host to host connections for network services TCP IP network services Edit Port numbers Edit Main article List of TCP and UDP port numbers Many Internet Protocol based services are associated with a particular well known port number which is standardized by the Internet technical governance For example World Wide Web servers operate on port 80 and email relay servers usually listen on port 25 TCP versus UDP Edit Different services use different packet transmission techniques In general packets that must get through in the correct order without loss use TCP whereas real time services where later packets are more important than older packets use UDP For example file transfer requires complete accuracy and so is normally done using TCP and audio conferencing is frequently done via UDP where momentary glitches may not be noticed UDP lacks built in network congestion avoidance and the protocols that use it must be extremely carefully designed to prevent network collapse See also EditInternet hosting service Web hosting service DNS hosting service E mail hosting serviceReferences Edit a b Network Service SDxCentral 12 June 2015 Archived from the original on 12 June 2015 Retrieved 4 August 2019 Network Service a capability that facilitates a network operation It typically is provided by a server which can be running one or more services based on network protocols running at the application layer in the Open Systems Interconnection OSI model of the network X 225 Information technology Open Systems Interconnection Connection oriented Session protocol Protocol specification Archived from the original on 1 February 2021 Retrieved 10 March 2023 Retrieved from https en wikipedia org w index php title Network service amp oldid 1146567484, wikipedia, wiki, book, books, library,
