Thursday, July 25, 2019
Wireless Networks and Pervasive Computing Essay Example | Topics and Well Written Essays - 500 words
Wireless Networks and Pervasive Computing - Essay Example This method has several advantages such as it is reliable, it is ordered, and it is heavy weight (Kozierok, 2005). It is reliable in that any message sent along it, arrives safely unless there is a problem with the connection. Also, when two messages are sent along a connection, the first message arrives first and ordered. However, if messages arrived in the wrong order, resend requests must be sent, which requires a lot of effort to put together. UDP is also a commonly used the message-based internet protocol that does not require any connection (Kozierok, 2005). According to Kozierok (2005), UDP is not be used to send crucial data like database information and web-pages, but for streaming video and audio. It is faster than TCP; hence, it is used in streaming media like real player, and Media audio files. Its speed is higher than that of TCP because it does not require any error correction or flow control. However, it is quite unreliable because the data sent along it is likely to be affected by errors and collision. Also, it is not ordered because messages sent can arrive in any order. Unlike the TCP, UDP is lightweight because it does not track its connections or order messages; hence, little effort is required to translate the data back from the packets (Reid and Lorenz, 2008). All computers, which are connected to the internet, must have an IP address. This is a unique number that is assigned to all computers as a means of recognizing a certain computer from others that are connected to the internet. When information is sent to a computer, it is accepted through the use of TCP/UDP ports. In is highly essential in business in order to ensure the data sent reaches its destination safe and in proper order. What happens is, when a computer program sends or receives data via the internet.