In networking, UDP is a fast and simple protocol that is primarily used for streaming applications. It was designed to be more efficient than TCP when the data being transmitted does not need reliable delivery but instead needs low latency and high throughput. When should you use it? Read on to find out!
This article talks about when UDP is preferred over TCP by examining the differences between these two protocols in terms of application, transport layer functionality, congestion control, reliability, and speed. We also look at how both protocols perform under various network conditions as well as what factors influence which one would be better suited for your requirements.
The application of UDP makes it suitable as a transport layer protocol in scenarios where reliability isn’t an important factor. Applications such as DNS lookups or NTP often rely on UDP rather than TCP because they are lightweight protocols with no built-in retransmission mechanisms (such as ACKs) which can make them inefficient when combined with higher layers that require reliable communication like file transfer or VoIP.
TCP, on the other hand, is a reliable protocol that ensures the packets are delivered in order as well as provides retransmission when necessary. This reliability makes TCP preferable for applications such as file transfer and VoIP because they require the data to be sent intact and error-free.
The amount of packet loss can affect which transport layer protocol would be more efficient when transferring data from one point to another. For instance, UDP will often have less latency than TCP over time due to its lack of built-in error correction mechanisms but might also suffer from greater packet losses under certain conditions such as congested networks or high packet load on intermediate routes between two nodes (e.g., ISPs).
Different network connections may work better with different protocols. For example, when a network connection is experiencing high packet loss and jitter (variation in the delay of individual packets), TCP may work better than UDP while lower packet losses might make UDP more suitable for application needs.
User requirements are key to understanding which protocol would be better suited to use under certain conditions. Some applications require that data be sent whole from one point to another without being altered or corrupted during transit, such as those required by banks and stock trading firms who need accurate information transmitted quickly on low latency networks; these cases will benefit most from using reliable protocols like TCP instead of less reliable ones like UDP. Other applications that transmit small fragments of data over time could tolerate occasionally lost fragments due to congestion or other network problems and would rather use less reliable protocols such as UDP instead.
when a game is played over the internet, it’s important that no packets are lost on the way from one computer to another in order for players to know about each other’s actions immediately; these types of games will benefit most by using TCP instead of UDP due to its reliability.
when watching videos online like Netflix or YouTube, users want their data delivered quickly and without interruption which means they need something more reliable than UDP – this can be achieved with TCP because even if some packets are lost along the way, enough others might still make it through so that a user doesn’t notice any gaps in playback.
when two people want to chat with each other over the internet, they need a protocol that will make sure their voices are sent reliably and in order – using UDP is acceptable for this type of application because if packets are lost here or there, it’s not as important due to the human ear being able to fill in gaps;
File transfer/file download:
when sending files back and forth over the internet like downloading movies from iTunes or BitTorrenting video games from Steamworks.com
Emails & message boards:
when an email client sends messages between servers across large distances, TCP is preferred so that any packet loss can be detected by its low delivery success rate which can then trigger reorders of those missing packets before they’re resent
when internet service providers and local businesses share resources or data centers, TCP is preferred for its connection reliability; it’s also required by the SLA of many commercial agreements.