A lot of things can negatively impact network performance

Question

Network Security

•  A lot of things can negatively impact network performance, from poor device drivers to competing traffic to inconsiderate users downloading gigabytes' worth of MP3s on your network. All this makes for poor relations between the users and your technical staff. You need a method of determining that traffic and balancing sufficient load with your business needs. To estimate the performance of your network, you need to understand the traffic that it will sustain. Are your users able to connect to the Internet and download MP3- or AVI-type files? Are network people using the wireless spectrum? to download large patches and configuration files? How many users are on the network at a given time and what are their main job functions?
•  Not all security breaches are malicious. A network user may be routinely scanning through his or her files and come across a filename that isn't familiar. The user may then call up the file, only to discover that it contains confidential personnel information, juicy office gossip, or your resume. Curiosity, rather than malice, is often the source of security breaches.