There space two types of web Protocol (IP) traffic. They are TCP or Transmission manage Protocol and UDP or User Datagram Protocol. TCP is link oriented – as soon as a link is established, data can be sent bidirectional. UDP is a simpler, connectionless web protocol. Multiple messages are sent out as packets in chunks utilizing UDP.

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TCP versus UDP comparison chart
TCPUDPAcronym because that Connection Function Usage Use by other protocols Ordering that data packets Speed of transfer Reliability Header size Common Header fields Streaming that data Weight Data Flow control Error checking Fields Acknowledgement Handshake
Transmission regulate Protocol User Datagram Protocol or global Datagram Protocol
Transmission manage Protocol is a connection-oriented protocol. User Datagram Protocol is a connectionless protocol.
As a message makes its method across the internet from one computer system to another. This is link based. UDP is additionally a protocol supplied in blog post transport or transfer. This is not connection based which method that one program have the right to send a fill of packets come another and that would be the finish of the relationship.
TCP is suited for applications that call for high reliability, and also transmission time is relatively less critical. UDP is perfect for applications that require fast, efficient transmission, such together games. UDP"s stateless nature is likewise useful because that servers that answer little queries from vast numbers the clients.
TCP rearranges data packets in the order specified. UDP has no natural order as all packets room independent of each other. If notified is required, it has to be managed by the application layer.
The speed for TCP is slower than UDP. UDP is faster because error recovery is no attempted. That is a "best effort" protocol.
There is absolute guarantee that the data transferred continues to be intact and arrives in the same order in which it was sent. There is no guarantee the the message or packets sent out would with at all.
TCP header dimension is 20 bytes UDP Header size is 8 bytes.
Source port, location port, examine Sum Source port, destination port, inspect Sum
Data is check out as a byte stream, no separating indications are transmitted come signal article (segment) boundaries. Packets are sent out individually and are checked for integrity only if castle arrive. Packets have actually definite limits which room honored top top receipt, an interpretation a read procedure at the receiver socket will yield an entire message as it was originally sent.
TCP is heavy-weight. TCP requires three packets to set up a socket connection, before any kind of user data deserve to be sent. TCP handle reliability and congestion control. UDP is lightweight. There is no notified of messages, no tracking connections, etc. The is a tiny transport great designed on peak of IP.
TCP does flow Control. TCP requires three packets to set up a socket connection, before any kind of user data deserve to be sent. TCP handle reliability and congestion control. UDP walk not have actually an choice for flow control
TCP walk error checking and error recovery. Erroneous packets are retransmitted native the resource to the destination. UDP does error checking however simply discards erroneous packets. Error recovery is not attempted.
1. Sequence Number, 2. AcK number, 3. Data offset, 4. Reserved, 5. Control bit, 6. Window, 7. Urgent tip 8. Options, 9. Padding, 10. Check Sum, 11. Source port, 12. Destination port 1. Length, 2. Resource port, 3. Location port, 4. Inspect Sum
Acknowledgement segments No Acknowledgment
SYN, SYN-ACK, ACK No handshake (connectionless protocol)

differences in Data Transfer features

TCP ensures a reliable and also ordered delivery of a currently of bytes native user come server or angry versa. UDP is not committed to end to end connections and also communication go not check readiness the receiver.


TCP is an ext reliable since it manages message acknowledgment and retransmissions in instance of shed parts. Hence there is for sure no missing data. UDP does no ensure that communication has reached receiver because concepts of acknowledgment, time out and retransmission space not present.


TCP transmissions are sent in a sequence and they are got in the exact same sequence. In the occasion of data segments showing up in dorn order, TCP reorders and also delivers application. In the case of UDP, sent message sequence might not be preserved when that reaches receiving application. There is absolutely no way of predicting the stimulate in which message will it is in received.


TCP is a hefty weight link requiring three packets for a socket connection and also handles congestion control and reliability. UDP is a lightweight transfer layer draft atop one IP. There room no tracking connections or notified of messages.

Method the transfer

TCP reads data as a byte stream and message istransfer come segment boundaries. UDP messages are packets i beg your pardon are sent out individually and on arrival space checked for their integrity. Packets have defined boundaries while data stream has actually none.

Error Detection

UDP works on a "best-effort" basis. The protocol supports error detection via checksum yet when an error is detected, the packet is discarded. Retransmission of the packet for recovery from that error is not attempted. This is because UDP is typically for time-sensitive applications favor gaming or voice transmission. Recovery from the error would be pointless since by the moment the retransmitted packet is received, it won"t be of any use.

TCP supplies both error detection and also error recovery. Errors space detected via checksum and if a packet is erroneous, that is not identified by the receiver, i beg your pardon triggers a retransmission through the sender. This operating device is called Positive Acknowledgement v Retransmission (PAR).

How TCP and also UDP occupational

A TCP link is created via a three method handshake, which is a procedure of initiating and acknowledging a connection. Once the link is created data transfer can begin. After ~ transmission, the connection is terminated by closing of all created virtual circuits.

UDP uses a basic transmission design without implicitly hand-shaking dialogues for guaranteeing reliability, ordering, or data integrity. Thus, UDP provides an unreliable service and datagrams might arrive the end of order, show up duplicated, or go absent without notice. UDP assumes the error checking and correction is either not essential or carry out in the application, staying clear of the overhead of such handling at the network user interface level. Unlike TCP, UDP is compatible v packet broadcasts (sending to all on local network) and multicasting (send to every subscribers).

Different Applications the TCP and UDP

Web browsing, email and paper transfer are common applications that manipulate TCP. TCP is supplied to manage segment size, price of data exchange, circulation control and network congestion. TCP is preferred where error correction infrastructure are required at network user interface level. UDP is mainly used through time perceptible applications and also by servers that answer small queries from huge number of clients. UDP is compatible with packet transfer - sending out to all on a network and multicasting – sending out to all subscribers. UDP is typically used in Domain name System, Voice over IP, Trivial file Transfer Protocol and also online games.

TCP vs. UDP for video game Servers

For giant multiplayer virtual (MMO) games, developers often have to do an architectural choice between making use of UDP or TCP persistent connections. The benefits of TCP space persistent connections, reliability, and being able to use packets of arbitrary sizes. The biggest trouble with TCP in this script is the congestion manage algorithm, i beg your pardon treats packet loss as a authorize of bandwidth limitations and automatically throttles the sending of packets. On 3G or Wi-Fi networks, this can cause a significant latency.

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Experienced developer Christoffer Lernö weighed the pros and cons and recommends the following criteria to select whether to use TCP or UDP for your game:

usage HTTP end TCP because that making occasional, client-initiated stateless queries when it"s yes sir to have actually an occasional delay. Usage persistent plain TCP sockets if both customer and server individually send packets but an occasional hold-up is yes (e.g. Virtual Poker, plenty of MMOs). Use UDP if both customer and server may individually send packets and also occasional lag is not OK (e.g. Most multiplayer action games, some MMOs).


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