Asked by: Sevastita Grunenthal
technology and computing artificial intelligence

When would you use UDP instead of TCP?

28
UDP is also used in situations wheretheexpense of creating a connection and syncing withTCPoutweighs the payload. DNS queries are a perfect example.Onepacket out, one packet back, per query. If using TCPthiswould be much more intensive.


Similarly, when should I use UDP instead of TCP?

Typically, use UDP in applications where speedismore critical than reliability. For example, it may be bettertouse UDP in an application sending data from afastacquisition where it is acceptable to lose some data points.Youcan also use UDP to broadcast to any machine(s) listeningtothe server.

Similarly, what are the benefits of using UDP instead of TCP as a transport protocol for DNS?
  • 1) UDP is much faster. TCP is slow as it requires3-wayhandshake.
  • 2) DNS requests are generally very small and fit well withinUDPsegments.
  • 2) UDP is not reliable, but reliability can added onapplicationlayer. An application can use UDP and can be reliableby using atimeout and resend at the application layer.

Then, 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.

Related Question Answers

Clora Halitov

Professional

What uses UDP protocol?

UDP (User Datagram Protocol) isanalternative communications protocol to TransmissionControlProtocol (TCP) used primarily for establishinglow-latencyand loss-tolerating connections between applications ontheinternet.

Sujuan Ehrman

Professional

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.

Ohara Nartey

Professional

Why is UDP needed?

UDP has the capability of adding the portaddressto IP. Reasons for using UDP: UDP reducesoverheadbecause it does not add flow control, error control, orsequencedelivery unlike connection-oriented services. UDP isusedfor the transmission of data in which delivery of the data ismoreimportant than accuracy.

Dorris Pietri

Explainer

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.

Branda Tzschockel

Explainer

Is TCP built on UDP?

If you're asking if TCP can be implementedinUDP, the answer is no. Both TCP and UDParebuilt on top of the IP, but the TCP usesdifferentpacket structure and at the layer-2 it is not possible tomimic theTCP using UDP packets.

Jaira Yallop

Explainer

What is the difference between TCP and UDP?

TCP (Transmission Control Protocol) isconnectionoriented, whereas UDP (User Datagram Protocol)isconnection-less. UDP does not use acknowledgments atall,and is usually used for protocols where a few lost datagrams donotmatter. Because of acknowledgments, TCP is consideredareliable data transfer protocol.

Noam Bakhvaloff

Pundit

What is difference between TCP and UDP socket?

They are TCP or Transmission Control ProtocolandUDP or User Datagram Protocol. TCP isconnectionoriented – once a connection is established, datacan be sentbidirectional. UDP is a simpler, connectionlessInternetprotocol. Multiple messages are sent as packets in chunksusingUDP.

Shabnam Illegorri

Pundit

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.

Shushanik Maritx

Pundit

Is VPN 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 . Preferred – UDP VPNtunnelsare the preferred OpenVPN connection method if yournetworksupports it.

Zalina Lieth

Pundit

Is MQTT TCP or UDP?

UDP: MQTT uses TCP, you canblockall UDP datagram packets.

Valverde Peffekoven

Pundit

Does OpenVPN use TCP or UDP?

OpenVPN is a relatively new andhighlyconfigurable protocol. ExpressVPN's version supportsbothUDP and TCP ports. UDP stands forUserDatagram Protocol. Though it can be configured to run on anyport,OpenVPN runs best on a UDP port, which isgenerallyfaster.

Rida Provecho

Teacher

How does TCP and UDP work?

Both TCP and UDP are protocols used forsendingbits of data — known as packets — over theInternet.They both build on top of the Internet protocol. In otherwords,whether you are sending a packet via TCP orUDP, thatpacket is sent to an IP address. TCP and UDPare not theonly protocols that work on top ofIP.

Luisana Kazan

Teacher

Abdeloihed Fienhold

Teacher

What is TCP and UDP protocol?

TCP (Transmission Control Protocol)isconnection oriented, whereas UDP (UserDatagramProtocol) is connection-less. UDP does notuseacknowledgments at all, and is usually used forprotocolswhere a few lost datagrams do not matter. Becauseofacknowledgments, TCP is considered a reliable datatransferprotocol.

Betsy Babinsky

Teacher

Why is TCP used?

TCP/IP is important because whole internetrunsover it. This is the protocols using which 2 differentnetworkElements communicate with each other. Without theTCP/IP thedata communication and Internet orInter-Networking of the devicesis not possible.

Balazs Zerbini

Reviewer

Why do we use TCP over UDP?

Because UDP does not employ congestioncontrol,but TCP does, it can take away capacityfromTCP that yields to UDP flows. The resultisthat UDP can: Achieve higher throughput thanTCP aslong as the network drop rate are within limitsthat theapplication can handle. Deliver packets fasterthanTCP with less delay.

Casimiro Lin

Reviewer

Which protocol is faster TCP or UDP?

15 Answers. UDP is faster thanTCP,and the simple reason is because its nonexistentacknowledge packet(ACK) that permits a continuous packet stream,instead ofTCP that acknowledges a set of packets, calculatedby usingthe TCP window size and round-trip time(RTT).

Magdolna Piffer

Reviewer

Is DNS a protocol?

DNS is a protocol within the setofstandards for how computers exchange data on the internet andonmany private networks, known as the TCP/IPprotocolsuite.

Melitina Schepin

Reviewer

Is DHCP a TCP or UDP?

The DHCP employs a connectionless servicemodel,using the User Datagram Protocol (UDP). It isimplementedwith two UDP port numbers for its operationswhich are thesame as for the bootstrap protocol (BOOTP). UDPport number67 is the destination port of a server, and UDPport number68 is used by the client.