NICS

Question 1

What is an Ethernet Cable?

Answer 1

A cable that’s used to connect devices with the LAN, generally transmit network packets through a network within a building.

Question 2

What makes up an Ethernet Cable?

Answer 2

Four twisted pairs of small copper wires.

Question 3

How does a damaged pair 1 (orange and striped orange) affect us?

Answer 3

Upload speed is reduced or negatively affected, or worst case unable to upload at all.

Question 4

How does a damaged pair 2 (Green and striped green) affect us?

Answer 4

Download speed will be greatly diminished.

Question 5

What are both Pair 1 and 2 mostly used for?

Answer 5

Lower speed internet (around 10 to 100mbps)

Question 6

What is pair 3 and pair 4 used for

Answer 6

Used for high speed internet (1 Gbps) and Power over Ethernet (PoE)

Question 7

How does a damaged pair 3 (Blue and striped blue) affect us?

Answer 7

Unlikely to affect when using slower internet, but if plugged into a PoE device it may malfunction due to unstable power input.

Question 8

How does a damaged pair 4 (Brown and striped brown) affect us?

Answer 8

Only affects PoE or fast internet, resulting to malfunction and/or unstable power input.

Question 9

What is Bandwidth?

Answer 9

The amount of data that can be transferred over a cable at one time.

Question 10

What is Latency?

Answer 10

The time it takes for data to get from one end of the cable to the other.

Question 11

How do we measure Latency?

Answer 11

Measured in milliseconds (ms)

Question 12

What is a Network?

Answer 12

A network is a series of computers linked together.

Question 13

How does WiFi work?

Answer 13

Uses radio waves to send information.

Question 14

What is Fiber?

Answer 14

A wired connection method that uses glass and light.

Question 15

What is Bluetooth?

Answer 15

A short range wireless connection method.

Question 16

Does Bluetooth have a reduced range compared to other wireless methods? (True/False)

Answer 16

True

Question 17

What is LiFi?

Answer 17

LiFi uses electromagnetic spectrum to transmit data between devices.

Question 18

What is a major downside to LiFi?

Answer 18

Since light is required for LiFi to transmit data, lack of light or shadows will be an issue.

Question 19

What is Storage?

Answer 19

Refers to an internal or external device that stores data.

Question 20

What are the differences between SSDs and HDDs?

Answer 20

HDDs are cheaper, generally higher capacity and slower. Whereas, SSDs are expensive, low capacity (in some cases) and faster.

Question 21

What type of storage does RAM use?

Answer 21

Volatile Storage

Question 22

What is Volatile Storage?

Answer 22

Storage devices that rely on power to maintain its state.

Question 23

What is Non-Volatile Storage?

Answer 23

Storage devices that can maintain its state even through or after power loss.

Question 24

What are examples of Non-Volatile Storage?

Answer 24

HDDs and SSDs

Question 25

What is faster? An NVMe SSD or a SSD that relies on SATA cables?

Answer 25

NVMe SSDs

Question 26

What is External Storage

Answer 26

Any kind of storage that is located outside of a computer.

Question 27

What is a downside to External Storage?

Answer 27

It is slower than internal storage, due to using a slower connection medium that SATA or NVMe.

Question 28

What is an Upside to External Storage?

Answer 28

It's portable and convenient.

Question 29

What is Data Redundancy?

Answer 29

The practice of keeping data in two or more places within a database or data storage system.

Question 30

What are the four Redundant Array of Independent Disks (RAID) we've learnt about?

Answer 30

RAID 0, 1, 10 and 5

Question 31

What is Striping?

Answer 31

Storing a single piece of data over two different disks, for example, the string "abcd" would be stored as "ac" and "bd" over two disks.

Question 32

What is Raid 0?

Answer 32

Focuses on speed, no redundancy to the system, uses a technique called "striping".

Question 33

What is RAID 1?

Answer 33

Maintains original speed but doubles redundancy, all your storage is mirrored onto a second device.

Question 34

What is RAID 10?

Answer 34

Utilising both speed of striping and redundancy of mirroring. Requires a minimum of 4 disks.

Question 35

Why do you need to replace a disk if it goes down in a RAID 10?

Answer 35

Because if one disks goes down, and there's no replacement the other mirrored disk may go down. Resulting in losing all the data.