An operator that manipulates individual bits. The operators that most people are familiar with, such as the addition operator (+), work with bytes or groups of bytes. Occasionally, however, programmers need to manipulate the bits within a byte. The C programming language supports the following bitwise operators:
>> Shifts bits right
<< Shifts bits left & Does an AND compare on two groups of bits | Does an OR compare on two groups of bits ^ Does an XOR compare on two groups of bits ~ Complements a group of bits Not all programming languages support bitwise operators.
- black hole
Slang term for a router that goes down (offline) and whose absence goes undetected by other routers on the network. Packets that are forwarded to that router simply get dropped and never arrive at their destination. Black holes are unable to generate destination unreachable messages, so users are left unaware that data is being lost.
(blak´list) (n.) In Internet terminology, a generic name for a list of e-mail addresses or IP addresses that are originating with known spammers. Individuals and enterprises can use blacklists to filter out unwanted e-mails, as most e-mail applications today have filtering capabilities. Also referred to as a blackhole list, the blacklist also can include ISPs […]
In printing terminology, it means an empty or unassembled printer ink cartridge or toner.
- blank character
Also called a space character. A blank character is produced when you press the space bar.
- blank-off plate
Small metal plates found on the back of a computer system on the actual case that cover the openings for expansion slots unoccupied by a sound card, video card, network card and so on. When adding a card or device to your system, you’ll need to remove the blank-off plate. Some blank-off plates are removed […]