B-Channel Bearer Channel
ISDN used in data transmission channels, data transfer rate of 64 KBPS.
B-ISDN Communications
Fiber-optic telephone lines as a transmission medium of the ISDN standard, is designed to simultaneously transmit audio and video data, the use of ATM technology as the way the transmission of information. Transmission rate 1.5MBPS.
Backdoor
Backdoor program is a direct invasion of the computer hacker behavior, the use of computers to bypass the normal access to pipeline the way the program will be a vicious implants the victim's computer system to steal important information, or vandalism.
For example, Backdoor Trojan (Trojan backdoor program) is a backdoor, Trojan disguised as a normal program will be its own program, or some special tools to attract users to download and run, in this process, it will usually replace the normal program , leaving the back door some special systems to facilitate subsequent manipulation of the system secret, even for large-scale denial of service 『』 (Denial of service) attacks.
Remote users with bad intentions may file without authorization, access information or control the computer, but the backdoor itself does not destroy computer systems, can not infect other files, it will not take the initiative to spread to the Internet other computers, depending on how hackers backdoor successfully "planted" to other people's computers, then the unlawful acts of vandalism.
Barebone
Barebone is a brand computer, DIY intermediate between computers, and many more "air machine", "white shell" (whitebox) way to ship semi-finished products, usually only the chassis, power supplies, fans, motherboards, CD-ROM drive, etc. equipment. Once consumers buy it, one can install on demand processor, hard disk and memory.
Barebone the word first appeared in the branded PC OEMs (such as Compaq; Compaq), there will be only motherboards, chassis and power pass device of the semi-finished products should be a "barebones" shipments for downstream manufacturers, which are assembled into different specifications brand computer and did not sell to the general type of semi-finished products to consumers. In recent years, Barebone gradually become the mainstream alternative DIY market, not only the stability of your computer with the brand, but also provided with the freedom of choice, the manufacturer gives it stylish, compact, beautifully designed appearance, deeply favored business and home markets . For the consumer, Barebone undoubtedly retained DIY flexibility, set for the use of demand in the body, but one problem, it does not become a computer orphans, and at least SFF vendors responsible for the maintenance and warranty. Similarly, the last operating assembly markets, dealers at home, but also no longer have to make up the East West, a complete PC shipments, as long as the buyer requests that an additional purchase in accordance with processor, hard drive and memory can be shipped, of course, can be avoided losses arising from price fluctuations. At present the major computer makers, including Gigabyte, MSI, ASUS Barebone all the others are introduced in various forms, but the industry has not had a unified specification. At first, barebone computer chassis with the general appearance similar size, and now it is becoming more and more compact, manufacturers not only than the specifications, but also more than creativity, uniqueness of the motherboard and chassis form a primary sights on spending a heavy artillery market. |
