Nhưng sự khác biệt là phần mềm tường lửa đã được bên trong máy tính của bạn, chạy dưới hệ điều hành của bạn. Đó là quá gần cho thoải mái cho tôi, tôi thích ý tưởng rằng một tường lửa phần cứng nằm bên ngoài máy tính điện tử với một khẩu súng ngắn. | 238 Part IV Failing to Communicate__ rented on a monthly basis. If you suspect a hardware failure you have every right to insist on a replacement. Soon after my first cable modem was installed I decided that I was dissatisfied with uneven speeds the download speed seemed to vary minute by minute. After I called to discuss the issue with the cable company they offered to swap one brand of DOCSIS modem for another within five minutes of the changeover it was obvious that the problem had been fixed. I never found out and it didn t really matter whether the original modem had been faulty or somehow not fully compatible with the incoming cable signal in my office or my own computer setup. And now four years later as I upgraded my office to include a telephone adapter for voice over Internet phone service I found decreasing download speeds and experienced some dropouts on the new phone service. I called the cable company and it brought me a third-generation cable modem and now I am communicating by keyboard and telephone at top speed. For the record as I write this paragraph I am receiving an astounding 3 911 kbps in download speed something on the order of 100 times faster than a dial-up modem. That s a good thing. Chapter 16 Breaking Out of the Box PC Cards USB and FireWire Jn This Chapter Playing 52 pickup with PC Cards Sailing away with USB ports Heating up with FireWire he beauty of a laptop of course lies in its compactness and portability. Here s a case where small is definitely better than large. But as I ve already discussed petite avoirdupois generally comes at the price of limited access to the internals. In other words it s difficult to gain access to the inside of a little box. Unlike desktop and tower PCs laptops do not include extra internal bays to hold additional hard drives CD or DVD drives or other devices. And although laptop motherboards are similar to those used in desktop machines they do not offer .
