- Plastic plug used to connect your telephone cord to the jack is a classic example of an RJ plug
- Only two types of RJ jacks: the RJ-11 and the RJ-45
- The phone jack is an RJ-11. It is used almost exclusively for modems
- The slightly wider RJ-45 jack is used for your network connection
- Have a slight D shape,
-Only one proper way to insert a plug into the socket and makes it easier to remember
- What they’re called
1. Technically, they’re known as D-sub or D-subminiature connectors,
2. Most techs call them DB
3. Usually for a printer or video
-Known as IEEE 1394,
-Moves data at incredibly high speeds,
Perfect connection for highly specialized applications, such as streaming video from a digital video camera onto a hard drive.
- FireWire consists of a special 6-wire connector
There’s also a smaller, 4-pin version, usually seen on peripherals.
- Like USB, FireWire devices are hot-swappable.
Universal serial bus (USB)
- Many different devices, such as mice, keyboards, scanners,
- Cameras, and printers. USB connections come in three different sizes:
1. A (very common),
2. B, and mini-B (less common).
3.The USB A connector’s distinctive rectangular shape makes it easily recognizable
2 Features :
- Hot-Swappable
1. Can insert or remove them without restarting your PC
2. Almost every other type of connector requires you to turn the system off,insert or remove the connector, and then turn the system back on
- Many USB devices get their electrical power through the USB connection, so they don’t need batteries or a plug for an electrical outlet
- Can cause catastrophic failure or upset failure
- Protection against ESD
1. Ground Bracalet or static strap
2. Ground mats
3. Static shielding bags
Computer functions through four stages:
1. INPUT
2. PROCESSING
3. OUTPUT
4. STORAGE
Knowing which parts participate in a particular stage of the computing process enables you to troubleshoot on a fundamental and decisive level.
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