...addresses and ports in IP packets. This basic form of firewall protection is really no more than a simple sorting algorithm. Generally they enable you to have some control through the use of access lists. Packet filtering can also often be performe...

...Be sure to use equipment that supports HDCP. • Problem 5: Flickering or unstable image. • Can be caused by: • Electromagnetic or radio frequency interference, bad cable, or cable that’s too long. These all can cause issues with HDCP or the sig...

...a link, extend signals over their native cabling with no signal conversion occurring. These amplification or repeater types of devices are designed to equalize and amplify the signal to go greater distances. Some support daisychaining, so by string...

...cool • Networking equipment —especially servers— generates a lot of heat in a relatively small area. Today’s servers are smaller and have faster CPUs than ever. Because most of the power used by these devices is dissipated into the air as heat, t...

...caused when power is switched on or off to a high-powered device. Surges can produce high-transient voltages, which damage LAN and serial interfaces that typically use less than 12 volts to transmit. • Avalanche diodes • Surges can be protected b...

...specifications for Switches and Mediaconverters for use in industrial applications are different. • DIN rail • DIN rail is a metal rail, usually installed inside an electrical enclosure, which is mainly used in industrial environments. These de...

...not install a Layer III switch and DSL Modems running a 10 kilometer copper line to do some gaming. You are running an office. • Then you will need a print server and a router to send and receive e-mails. • If you send e-mails and make appointments ...

...area network stretching over several kilometers? • No problem with DSL products from Black Box. While the extent of local area networks was greatly limited in the past by the tight restrictions imposed by the physical cabling, technical innovations ...