The main drawback of copper wiring is that these are prone to noise from random magnetic impulses that disrupt communication signals. This factor is very important in computer networking as data transfer rates are affected. Digital data are electrical pulses where a specific pulse represents a 1 or 0. Increasing throughput means decreasing the length of the pulse. Thus, 10GbaseT implementation means 10 billion pulses per second. Thus, only a very small signal disruption can be tolerated. Thus, some high speed implementation requires the use of fiber optic cables which is based on light pulses that are not affected by radio noise. However, fiber optics is expensive as compared to copper wiring. Thus, fiber optics is best limited to implementations where high speeds are required. This makes interconnection from fiber optics to copper wire necessary in implementations and thus requires Media Converters.
Networks also require control and maintenance. The use of a DVI KVM Switch allows using a single set of Keyboard, Video and Mouse across many computers and hence allows a centralized control. Viruses and unauthorized access on a network is also undesirable. However, manual monitoring across many nodes can be difficult and is not possible. Thus using automated security through a Network Access Control system can be cost effective.