3.1 Hardware - section 2, 10 Flashcards
Bit:
The term bit refers to a binary digit. A single “bit” can store one of two values: 1 or 0. And is display using a lowercase “b”. Computer measure storage and data transfer rates in terms of bits
Nibble:
is 4 bits
Byte:
is 8 bits. Is displayed using an uppercase “B”.
Kilobit:
1000 bits(1Kb), 1Kbps(1Kilobit per second).
Mega:
Meaning 1,000,000(1 million) so you can have 1Mb(1 Megabit) or 1MB(1 Megabyte)
Giga:
Meaning 1,000,000,000(1 billion) so you can have 1Gb(1 Gigabit) or 1GB( 1 Gigabyte)
Tera:
Meaning 1,000,000,000,000(1 trillion) so you can have 1Tb(1 Terabit) or 1TB(1 Terabyte)
What does USB stand for
Universal Serial Bus
DB9 Connector:
D-Shaped sub-miniature pin at the back of a computer. The fastest speed of a Serial Cable is 115 kilobits per second.
Host Controller:
Uses the same amount of bandwidth for all devices in a port.
USB Cale Length performance difference
Longer Cables have higher changes of resistance and speed and signal deterioration. A short cable will give maximum performance.
What is an HDMI cable
HDMI is the most Widely used video Interface. HDMI High Resolution 4k and 8k with 60, 120, or 144 Hertz
HDMI Digital Content Protection (HDCP):
Allows a device to validate the connection
The two HDMI cable categories
HDMI Category 1 (Standard), HDMI Category 2 and Category 2.1 (High Speed)
HDMI Category 1 (Standard)
Used for video content .Category 1 supports 1080P and 60 Hertz
HDMI Category 2 and Category 2.1 (High Speed)
Has a great length of distance and high resolution. Category 2 and 2.1 includes premium high speed of 18Gbps and ultra-high speed of 48Gbps that are specified for data transfer
What is an DP cable
DisplayPort (DP): Display port was developed by the industry association known as the Video Electronic Standards Association or VESA. Display was made to compete with HDMI, so most things you find with HDMI also have Display Port. DisplayPort has the same capabilities as HDMI. DisplayPort can support high speed data transfer up to 20Gbps
DVI Cable Types
DVI-A (Analog), DVI-D, DVI-I
What is a VGA cable.
Video Graphics Array (VGA): Uses a 15-pin standard analog video interface port. VGA connectors are a “D” shaped connector similar to a serial connector but instead of 9 or 25 pins it only has 15.
What is a Thunderbolt cable
Thunderbolt: Acts like a display interface like HDMI and DisplayPort, but can do data transfer which is what it is mainly used for. Was extremely popular with apple products originally, but has been used for Windows and Linux computers as well.
Versions of Thunderbolt
Only verisons 1, 2 , 3 are for video interface, version 4 is for storage.
The two types of twisted pair cabling
Unshielded twisted pair(UTP), Shielded twisted pair(STP)
Unshielded Twisted Pair
Unshielded Twisted Pair(UTP): UTP is the cheaper cable. UTP doesn’t use any metal in the shielding and therefore UTP is going to be cheaper, for it is all plastic, except for the thin copper wires inside the four pairs that make up the eight wires. Because of its low cost UTP is the common choice for most local area networks these days. UTP can be bent very easily and pushed through tight and small spaces.
Shielded Twisted Pair
Shielded Twisted Pair(STP): Is the same as UTP, except that each twisted pair inside the cable sheath is wrapped inside metal foil, and will also have a braided metallic shield wrapping around each pair. All the extra metal in STP makes STP more expensive to buy compared to UTP.
