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connectionless communication wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 attributes 2 architecture and implementations 3 references toggle the table of contents connectionless communication 12 languages العربية čeština فارسی français bahasa indonesia italiano 日本語 한국어 türkçe українська tiếng việt 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redirected from connectionless network protocol with routing per packet this article needs more citations please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed find sources connectionless communication news newspapers books scholar jstor february 2018 learn how and when to remove this message connectionless communication often referred to as cl mode communication 1 is a data transmission method used in packet switching networks using data packets that are frequently called datagrams in which each data packet is individually addressed and routed based on information carried in each packet rather than in the setup information of a prearranged fixed data channel as in connection oriented communication connectionless protocols are usually described as stateless protocols the internet protocol ip and user datagram protocol udp are examples attributes edit under connectionless communication between two network endpoints a message can be sent from one endpoint to another without prior arrangement the device at one end of the communication transmits data addressed to the other without first ensuring that the recipient is available and ready to receive the data some protocols allow for error correction by requesting retransmission connectionless protocols are stateless protocols because the endpoints have no protocol defined way to remember where they are in a conversation of message exchanges it has lower overhead than connection oriented communication because in connection oriented communication the communicating peers must first establish a logical or physical data channel or connection in a dialog preceding the exchange of user data it allows for multicast and broadcast operations in which the same data are transmitted to several recipients in a single transmission in connectionless transmissions the service provider usually cannot guarantee that there will be no loss error insertion misdelivery duplication or out of sequence delivery of the packet however the effect of errors may be reduced by implementing error correction within an application protocol in connectionless mode there is less opportunity for optimization when sending several data units between the same two peers by establishing a connection at the beginning of such a data exchange the components routers bridges along the network path would be able to pre compute and hence cache routing related information avoiding re computation for every packet in connection oriented communication network components can also reserve capacity for the transfer of the subsequent data units of a video download for example architecture and implementations edit distinction between connectionless and connection oriented transmission may take place at several layers of the osi reference model transport layer tcp is a connection oriented transport protocol udp is connectionless network layer data link layer the ieee 802 2 protocol at the logical link control sublayer of the data link layer may provide both connectionless and connection oriented services 2 in fact some network protocols such as sna s path control in its early stages require a connection oriented data link layer others like ip do not after the appearance of appn sna could operate on a connectionless data link service as well 3 notable connectionless protocols are internet protocol ip user datagram protocol udp internet control message protocol icmp internetwork packet exchange ipx transparent inter process communication netbios and fast and secure protocol fasp references edit information processing systems open systems interconnection transport service definition addendum 1 connectionless mode transmission international organization for standardization international standard 8072 ad 6 december 1986 understanding logical link control cisco retrieved 7 september 2026 the llc layer provides connectionless and connection oriented data transfer connectionless data transfer is commonly referred to as llc type 1 or llc1 connection oriented data transfer is referred to as llc type 2 or llc2 networking on z os sna advanced peer to peer networking appn ibm retrieved 7 september 2026 appn hpr supports nondisruptive route switching for failure recovery and connectionless intermediate routing of packets this article incorporates public domain material from federal standard 1037c general services administration archived from the original on 2022 01 22 retrieved from https en wikipedia org w index php title connectionless_communication oldid 1378475042 categories network protocols computer networking internet architecture internet protocols hidden categories articles with short description short description is different from wikidata articles needing additional references from february 2018 all articles needing additional references wikipedia articles incorporating text from the federal standard 1037c 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