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Embed code for: 01.7 Impact of User Applications on the Network
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01.7 Impact of User Applications on the Network
9/11/2016 Cisco ELearning for ICND1 v2.0 https://ondemandelearning.cisco.com/ciscosc/icnd1#/sections/1/pages/7 1/2 Impact of User Applications on the Network Section 1: Exploring the Functions of Networking Batch Applications Applications such as FTP and TFTP are considered batch applications. Both are used to send and receive files. Typically, a user selects a group of files that need to be retrieved and then starts the transfer. Once the download starts, no additional human interaction is required. The amount of available bandwidth determines the speed at which the download occurs. While bandwidth is important for batch applications, it is not critical. Even with low bandwidth, the download is completed eventually. FTP, TFTP, and inventory updates No direct human interaction Bandwidth important but not critical Interactive Applications Interactive applications are applications in which the user waits for a response, such as inventory lookup or a database update. Because these applications require human interaction, response times are more important than for batch applications, but they still are not critical. The transaction will still be completed if the appropriate amount of bandwidth is not available, but it may take longer. Inventory inquiry and database update Humantomachine interaction Response time important but not critical, unless the wait becomes excessive for the person who is waiting 9/11/2016 Cisco ELearning for ICND1 v2.0 https://ondemandelearning.cisco.com/ciscosc/icnd1#/sections/1/pages/7 2/2 RealTime Applications Realtime applications such as voice and video applications also involve human interaction. Because of the amount of information that is transmitted, bandwidth is critical. In addition, because these applications are timecritical, delay on the network can cause a problem. Timely delivery of the data is crucial. It is also important that data is not lost during transmission, because realtime applications, unlike other applications, do not retransmit lost data. Therefore, sufficient bandwidth is mandatory and the quality of the transmission must be ensured by implementing QoS. QoS is a way of granting higher priority to certain types of data, such as VoIP. VoIP and video Humantohuman interaction Endtoend latency critical Up Next: Challenge