CHAPTER 2: Setting Up and Getting Started10Preparing powerconnectionsProtecting from power source problemsDuring a power surge, the voltage level of electricitycoming into your computer can increase to far abovenormal levels and cause data loss or system damage.Protect your computer and peripheral devices byconnecting them to asurge protector, which absorbsvoltage surges and prevents them from reaching yourcomputer.Anuninterruptible power supply (UPS) suppliesbattery power to your computer during a powerfailure. Although you cannot run your computer foran extended period of time with a UPS, a UPS lets yourun your computer long enough to save your work andshut down your computer normally.Connecting to abroadband modem ornetworkYou can connect your computer to a broadband (cableor DSL) modem or to a wired Ethernet network.WarningHigh voltages can enter your computer through both thepower cord and the modem connection. Protect your computer byusing a surge protector. If you have a telephone modem, use a surgeprotector that has a modem jack. If you have a cable modem, usea surge protector that has an antenna/cable TV jack. During anelectrical storm, unplug both the surge protector and the modem.ImportantYour computer has a built-in Ethernet (network) jack.