The benefits of remote access servers and services (RAS) • The benefits of remote access servers and services (RAS) • Difference between a device server and a terminal server • at first glance, device servers and terminal servers are just devi...

TCP and Latency • Latency is the time—measured in milliseconds—a round-trip signal takes to travel a network. Latency often has little to do with the physical distance a signal travels; it’s more affected by the number and type of nodes that a...

PoE phantom power • PoE phantom power • PoE over Gigabit Ethernet • 10BASE-T and 100BASE-TX Ethernet use only two pairs of wire in 4-pair CAT5/CAT5e/CAT6 cable, leaving the other two pairs free to transmit power for Power over Ethernet (PoE) a...

Multimode vs. Singlemode Fibre • Multimode vs. Singlemode Fibre • Multimode fibre cable has a large-diameter core and therefore has multiple modes of propagation—that is, several wavelengths of light are used in the fibre core. It’s primarily ...

Digital input/output (DIO). • Digital input/output (DIO) • Built around simple relays • A digital signal is a signal that exists in one of two states: high or low, open or closed, on or off. A digital input/output (DIO) device is hardware that...

Skewing effect. • Skewing effect • Higher or lower twist ratios • Within a CATx cable of a certain length, the individual pairs might have individual different lengths, caused by higher or lower twist ratios. • There are two common cable stand...