Bit Binary Digit
Bit, a minimum of two binary (BINARY) unit, a bit is not 0 is 1.-Bit units of measurement are: 1. KILOBIT, 2 of the 10th power: 1024 BIT.2. MEGABIT, 2 of the 20th power: 1048576 BIT, or 1024 KBIT.3. GIGABIT, 2, 30-th power: 1073741824 BIT, or 1024 MEGABIT.4. TERABIT, 2, 40-th power: 1099511627776 BIT, or 1024 GIGABIT.5. PETABIT, 2 of 50 Party: 1125899906842624 BIT, or 1024 TERABIT.6. EXABIT, 2, 60-th power: 1152921504606846976 BIT, or 1024 PETABI
Bitmap Graphic
Bitmap graphics storage way, the color value of every point with a group of bits (BIT) to store.
Blacklists & White lists spam blacklist and whitelist
"Blacklist" refers to a prior e-mail filters. blacklists is the most widely used solution for fighting spam, but this approach is not ideal, sometimes it is not only not be able to effectively stop spam, but also generate false alarms (false-positive), led to some legal and important e-mail will never get there.
Each solution might have, and a "white list (Whitelists)" little relationship. And blacklists based on the practice of exclusion is different from a "white list" approach is to work to identify sources of legitimate email, which will not rule out the mistakes of the blacklist.
White list is so important, e-mail device maker IronPort Systems founder Scott Banister has launched a called Bonded Sender (guaranteed to send people) white list action. Bonded Sender is still at the experimental stage, it is not the Banister mind a concept of dealing with spam.
Blade server blade-based servers
This is where data center technology, the latest and most popular trends. With all the hardware of the server systems, such as processors, memory, hard disk drives, and network connections into a single expansion card, or the so-called "blade" on.
Blade to the concept of server density to a peak, so that integration represents a more attractive alternative: You can reduce costs, reduce the temperature and reduce the space required, further, but also improve the stability of the server and receive a lower total cost of ownership (TCO).
Blade-intensive build, its real advantage is that you can easily and quickly add more servers. No longer have to waste several hours to install another incompatible with Jaguar slide tool, is now the administrator as long as a few seconds you can insert a new server.
And replacing a broken server, the same simple. Each blade is an independent, insert or remove a blade to the same base will not affect the operation of other blades. |
