UDP reduces overhead because it does not addflowcontrol, error control, or sequence deliveryunlikeconnection-oriented services. UDP is used forthetransmission of data in which delivery of the data ismoreimportant than accuracy. Therefore, UDPisneeded..
Subsequently, one may also ask, why do we need UDP?
UDP can be used in applicationsthatrequire lossless data transmission when the applicationisconfigured to manage the process of retransmitting lost packetsandcorrectly arranging received packets. This approach can helptoimprove the data transfer rate of large files comparedtoTCP.
Secondly, why UDP is unreliable protocol? Streaming media such as video,audio and othersuseUDP because it offers speed. The reason UDP isfasterthan TCP is because there is no form of flow control. Noerrorchecking,error correction, or acknowledgment is donebyUDP.UDP is only concerned with speed.
Also question is, why would an application use UDP instead of TCP?
Because UDP does not employ congestioncontrol,but TCP does, it can take away capacity fromTCP thatyields to UDP flows. The result is thatUDP can:Achieve higher throughput than TCP as long asthe networkdrop rate are within limits that the applicationcan handle.Deliver packets faster than TCP withlessdelay.
What does UDP mean?
User Datagram Protocol (UDP) is part oftheInternet Protocol suite used by programs running ondifferentcomputers on a network. UDP is used to send shortmessagescalled datagrams but overall, it is an unreliable,connectionlessprotocol. UDP is officially defined inRFC 768 andwas formulated by David P. Reed.
Related Question Answers
What layer is UDP?
TCP and UDP are transport layerprotocolsand as such exist at layer 4 of the OSI model abovetheNetwork Layer and below theSessionLayer.Does Netflix use UDP?
For non real time video streaming, likeNetflix,Hulu, Youtube, etc. they just use TCP anddobuffering instead of UDP, since they don't careabout a fewseconds delay between the server and client. That said,one of themost popular video streaming protocols that is basedonUDP/IP is RTP.Is UDP better than TCP?
UDP is efficient for broadcast and multicasttypeof network transmission. TCP is reliable as itguaranteesdelivery of data to the destination router. UDPisfaster, simpler and more efficient thanTCP.Retransmission of lost packets is possible in TCP,but notin UDP.What is the advantage of UDP over TCP?
First, one of the attractive features of UDPisthat since it does not need to retransmit lost packets nor doesitdo any connection setup, sending data incurs less delay. Thislowerdelay makes UDP an appealing choice fordelay-sensitiveapplications like audio and video.Which is better TCP or UDP?
UDP. Faster Speed – UDP VPNserviceoffers significantly greater speeds than TCP. Forthisreason it is the preferred protocol when streaming HD videosordownloading torrents/p2p . Lower Reliability – Onrareoccasions UDP can be less reliable that TCPVPNconnections as UDP does not guarantee the deliveryofpackets.Which applications use UDP protocol?
Following implementations uses UDP as a transportlayerprotocol: - NTP (Network Time Protocol)
- DNS (Domain Name Service)
- BOOTP, DHCP.
- NNP (Network News Protocol)
- Quote of the day protocol.
- TFTP, RTSP, RIP, OSPF.
How does UDP protocol work?
UDP works on top of the IP protocol.InUDP the sender constructs a datagram packet and addressitwith a port number(the IP address of course belongs to theIPprotocol and not UDP). The data the sender wantstotransmit is also appened to the datagram. The application willhaveto deal with splitting up the data.What is the size of UDP header?
8 bytes
Where is UDP used?
UDP (User Datagram Protocol) is anthercommonlyused protocol on the Internet. However, UDPis neverused to send important data such as webpages,databaseinformation, etc; UDP is commonly used forstreamingaudio and video.Is UDP secure?
UDP has no connection, so you can forge apacketwith an arbitrary IP address and it should get to theapplication.So in that sense, TCP is more "secure" thanUDP.Depending on the application, this may or may not berelevant tosecurity.How reliable is UDP?
UDP by itself isn't reliable. Thedataacknowledge/retransmission functions have to occur at ahigher(i.e. application) level. TFTP is a good example of that.WhileUDP is not reliable, a lot of protocols use itas abase and add reliability at applicationlevel.Is http UDP or TCP?
HTTP uses TCP because the files,images,web pages which we get from the remote host should not bedroppedon the way and it should be delivered in order to theHTTPclient. HTTP could also use UDP butusually not, if aUDP packet containing the first part of aweb page is lost,then its not retransmitted.Does FTP use UDP?
FTP itself uses the TCP transportprotocolexclusively, or in other words, it never uses UDPfor itstransport needs. Typically an application layer protocolwilluse one or the other. One notable exception tothatis DNS or Domain Name System. FTP also isoddin the fact that it uses two ports to accomplishitstask.What are the two types of ARQ?
Three main types of the ARQ aretheStop-and-wait ARQ, Go-Back-N ARQ, andSelectiveRepeat ARQ. Stop-and-wait ARQ is thesimplestARQ. Selective Repeat ARQ may be used forthedelivery and acknowledgement of sent data packets or thedeliveryof subdivided messages in sub-units.What is UDP header?
User Datagram Protocol (UDP) is aTransportLayer protocol. User Datagram Protocol(UDP) is moreefficient in terms of both latency andbandwidth. UDP Header– UDP header is 8-bytesfixed and simple header,while for TCP it may vary from 20bytes to 60 bytes.What is UDP streaming?
UDP. (User Datagram Protocol) A TCP/IPprotocolthat is widely used for streaming audio and video,voiceover IP (VoIP) and videoconferencing. UDP is consideredanunreliable delivery protocol because it does not checkforerrors.What is reliable protocol?
Reliable protocol implies theProtocolprovides assurance of the delivery of data to theintendedrecipient(s), as opposed to an unreliable protocol,whichdoes not provide notifications to the sender as to thedelivery oftransmitted data or messages.Is IP connection oriented?
In terms of the OSI model, IP is anetwork-layerprotocol. It provides a connectionless datatransmission service,and supports both TCP and UDP. Data istransmitted link by link; anend-to-end connection is neverset up during thecall. 
