tailieunhanh - Upgrading & Fixing Laptops FOR DUMmIES phần 7

tôi không phải là một fan hâm mộ của khái niệm. Họ làm việc theo cách tương tự như một tường lửa phần cứng, kiểm tra tất cả các gói tin đến để xem nếu nó thực sự dành cho máy tính của bạn hoặc chỉ là ngẫu nhiên jiggling xử lý tìm kiếm một cánh cửa mở khóa. | 202 Part IV Failing to Communicate_ Although the market offers some very capable software firewalls I am not a fan of the concept. They work in much the same way as a hardware firewall examining every incoming packet to see if it was really intended for your machine or just randomly jiggling the handles looking for an unlocked door. But the difference is that the software firewall is already inside your computer running under your operating system. That s too close for comfort for me I like the idea that a hardware firewall sits outside the computer with an electronic shotgun. Chapter 14 Feeling Up in the Air Jn This Chapter Working without wires Learning the ins and outs of WiFi Calling for security Finding fixing and upgrading laptop WiFi wireless network is just like a wired one except for the lack of wires. It s that missing physical link that makes wireless computing so very attractive because it allows you to move a laptop from room to room in your home or office and stay connected. And perhaps best of all it permits traveling laptop users to link up to the Internet an e-mail server and even to a private office network while on the road in airport lounges in hotels and at designated public-access wireless Internet hotspots in coffee shops business centers and other places. It s in the air Millions of users with laptop owners at the forefront are cutting the wires that bind them to the Internet to devices like printers and to networks that connect one machine to another. Wireless systems follow the same basic principles as a wired network Each device has its own ID and packets of information are addressed to assure that only the intended recipient receive the data unfortunately although designers of wireless systems have gotten very good at protecting data the mere fact that the information is floating in the ether invites snoops to attempt to intercept communication. Be careful out there Look Ma No Wires Like almost .