Tech knowledge

A computer cabinet is an enclosure with fitted, fixed or removable side panels and doors. The cabinet contains a computer rack for mounting computers or other electronic equipment. Cabinets come in a variety of sizes, colors and styles and may contain baffles and fans to facilitate cooling and minimize recycled and bypass airflow. he terms rack and cabinet are often used interchangeably. However, a rack refers to the frame for actually mounting computers and other electronic equipment, while a cabinet is fitted with doors and side panels and may enclose a rack.  A well-designed computer or server cabinet should provide significant segregation between cool air supply and hot air return. To prevent bypass air, blanking panels may be used. These fit into empty rack space, preventing cool air from moving though a cabinet without cooling the electronics. The panels can also prevent hot air (from the servers installed above and below an empty space) from pushing its way back into the syst

H ow many times every day do you hear recorded music on the  TV , in stores, in  elevators —even in the street? You'd never hear music at all if it weren't for  loudspeakers : electric sound-making machines. Most of the music we hear around us is played back with big loudspeakers attached to stereos or tiny earbud  headphones .  Radios ,  televisions , computers ,  cellular phones , intercoms, and talking toys are just some of the electric gadgets that make sounds with loudspeakers. But what exactly are loudspeakers and how do they work? How loudspeakers turn electricity into sound When things shake about, or vibrate, they make the sounds we can hear in the world around us. Sound is invisible most of the time, but sometimes you  can  actually see it! If you thump a kettle-drum with a stick, you can see the tight drum skin moving up and down very quickly for some time afterward—pumping sound waves into the air. Loudspeakers work in a similar way. At the front of a lou

# Define UPS :- An uninterruptible power supply (UPS) provides nearly instantaneous power when the main utility power source fails, allowing either time for power to return or for the user to shut down the system or equipment normally by closing running computer system applications and using the operating system to shut down the system. The user has between five and 15 minutes to shut down a system normally or bring an auxiliary power source online to restore the power supply. In addition, most UPS systems also work to address power source electrical surges, sag voltage, voltage spikes, frequency instability, noise interference or harmonic distortion from the ideal sinusoidal wave form. #Explains  :- A UPS is not limited by equipment type and ensures uninterruptible power to computers, data centers or other electrically powered equipment during an unexpected power failure. UPS units vary depending on the protected equipment size, which can range from

What is a Network? A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams. Two very common types of networks include: Local Area Network (LAN) Wide Area Network (WAN) ·          You may also see references to a Metropolitan Area Networks (MAN), a Wireless LAN (WLAN), or a Wireless WAN (WWAN). ·          Local Area Network ·          A Local Area Network (LAN) is a network that is confined to a relatively small area. It is generally limited to a geographic area such as a writing lab, school, or building. ·          Computers connected to a network are broadly categorized as servers or workstations. Servers are generally not used by humans directly, but rather run continuously to provide "services" to the other computers (and

How to Know what DDR1/2/3... Ram is using?? Or what type of ram is suitable for my motherboard ·     You will check what DDR ram you are using first of all you can see in the motherboard. Where the ram is plug in and then in the middle of the ram slot. You can see also in the above figure, You can check How many Voltages are wrote in a ram slot. So if                2.5v ----- DDR1 1.8v ----- DDR2 1.5v ----- DDR3 1.2v ----- DDR4 So, according to the voltage, we are finding that what DDR ram is suitable for your motherboard 

A hard disk is part of a unit -- often called a  disk drive ,  hard drive  or  hard disk drive  -- that stores and provides relatively quick access to large amounts of data on an electromagnetically charged surface or set of surfaces. Today's computers typically come with a hard disk that can contain anywhere from billions to trillions of bytes of storage. A hard disk is actually a set of stacked disks, like phonograph records. Each disk has data recorded electromagnetically in concentric circles, or tracks, on the disk.  A head , similar to a phonograph arm but in a relatively fixed position, writes or reads the information on the tracks. Two heads, one on each side of a disk, read or write the data as the disk spins. Each read or  write operation requires that data be located, an operation called a  seek . Data already in a disk cache, however, will be located more quickly. A hard disk/drive unit comes with a set rotation speed varying from 4,200 revolutions per minute to