TAILIEUCHUNG - Laptops All-in-One Desk Reference For Dummies- P59

Laptops All-in-One Desk Reference For Dummies- P59: Okay, I’ll admit it: I’ve got a strange biography. I’ve been a writer all my life. My first semi-pro job was sports editor of my high school newspaper. (Go Commodores!) After college I was a political reporter for daily newspapers in Ohio and New York (I covered four national nominating conventions and two Presidential campaigns) and a correspondent for The Associated Press. And then, in 1983, I gave in to my inner geek and became the first Executive Editor of PC Magazine, back in the days when most people asked, “What is a PC?”. | 554 Cutting the Wires Other Ways IR is radiation of a frequency lower than visible light below red but higher than microwaves. The technology has one big disadvantage in comparison to WiFi and Bluetooth Devices have to be able to see each other across the room. Signals might be able to bounce around a desk or off the ceiling but not through a door or wall. For computers infrared communication is an adaptation of the standard with a top speed of about Mbps but only if there is nothing in the way and if the angle of communication is head-on or no more than about 15 degrees off center. Many laptops two or three generations old perhaps three to six years old came with infrared circuitry and a small red-filtered window for use in communication. The IR port is a specialized version of a standard serial port. Windows from Windows 98 and later include built-in support for IR ports often using an industry standard name of IrDA. An Infrared Wizard configures the IR serial port and troubleshoots communication between devices. There are a handful of cordless mice and keyboards available for use with IR systems if you re buying a new system there is little reason not to use WiFi instead. On the horizon Wireless USB Within the next few years many laptops will come equipped with an extension of the already ubiquitous USB port. Wireless USB WUSB devices are expected to include hard disk drives CD DVD drives modems printers digital cameras LCD projectors and things we haven t even thought of yet. In its initial version USB can communicate between devices at speeds of about 480 Mbps which is comparable to real-world throughput on a wired USB circuit. Designs are already in the works to double WUSB to at least 1 Gbps by about 2010. Although it technically isn t a network it s a means of communication between disparate devices it shares many of the same attributes as WiFi and Bluetooth. WUSB uses a technology called Ultra Wideband radio allowing devices to communicate .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.