Which type of applications are best suited to use udp as the transport layer protocol?

Last Updated on November 2, 2020 by Admin

applications that need data flow control
applications that require reliable delivery
applications that handle reliability themselves
applications that need the reordering of segments

applications that can tolerate some data loss, but require little or no delay

Answers Explanation & Hints:

Applications that can tolerate some data loss, require a simple request and reply, and handle reliability themselves are best suited for UDP. UDP has low overhead and no requirement of reliability. TCP provides services for reliability, controlling data flow, and the reordering of segments.

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TCP is a great example of how the different layers of the TCP/IP protocol suite have specific roles. TCP handles all tasks associated with dividing the data stream into segments, providing reliability, controlling data flow, and the reordering of segments. TCP frees the application from having to manage any of these tasks. Applications, like those shown in the figure, can simply send the data stream to the transport layer and use the services of TCP.

There are three types of applications that are best suited for UDP:

Live video and multimedia applications - Can tolerate some data loss, but require little or no delay. Examples include VoIP and live streaming video.

Simple request and reply applications - Applications with simple transactions where a host sends a request and may or may not receive a reply. Examples include DNS and DHCP.

Applications that handle reliability themselves - Unidirectional communications where flow control, error detection, acknowledgments, and error recovery is not required or can be handled by the application. Examples include SNMP and TFTP.

Although DNS and SNMP use UDP by default, both can also use TCP. DNS will use TCP if the DNS request or DNS response is more than 512 bytes, such as when a DNS response includes a large number of name resolutions. Similarly, under some situations the network administrator may want to configure SNMP to use TCP.

There are three types of applications that are best suited for UDP:

Applications that can tolerate some data loss, but require little or no delay

Applications with simple request and reply transactions

Unidirectional communications where reliability is not required or can be handled by the application

Many video and multimedia applications, such as VoIP and Internet Protocol Television (IPTV) use UDP. These applications can tolerate some data loss with little or no noticeable effect. The reliability mechanisms of TCP introduce some delay that can be noticeable in the quality of the sound or video being received.

Other types of applications well suited for UDP are those that use simple request and reply transactions. This is where a host sends a request and may or may not receive a reply. These types of applications include:

Some applications handle reliability themselves. These applications do not need the services of TCP, and can better utilize UDP as the transport layer protocol. TFTP is one example of this type of protocol. TFTP has its own mechanisms for flow control, error detection, acknowledgements, and error recovery. It does not need to rely on TCP for those services.

Mar 31, 2020 Last Updated: Aug 11, 2022

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