LAN speeds are measured in

BPS (Bits Per Second)
KBPS (Kilo Bits Per Second)
MBPS (Mega Bits Per Second)
MIPS (Million Instructions Per Second)

The correct answer is: C. MBPS (Mega Bits Per Second)

BPS (Bits Per Second) is the basic unit of measurement for data transfer speed. It is the number of bits that can be transmitted in one second. KBPS (Kilo Bits Per Second) is 1000 times faster than BPS. MBPS (Mega Bits Per Second) is 1000 times faster than KBPS. MIPS (Million Instructions Per Second) is a measure of the speed of a computer processor. It is not a measure of data transfer speed.

Here is a table that shows the different units of measurement for data transfer speed and their corresponding values:

| Unit | Value |
|—|—|
| BPS (Bits Per Second) | 1 bit per second |
| KBPS (Kilo Bits Per Second) | 1000 bits per second |
| MBPS (Mega Bits Per Second) | 1000000 bits per second |
| GBPS (Giga Bits Per Second) | 1000000000 bits per second |
| TBPS (Tera Bits Per Second) | 1000000000000 bits per second |

Data transfer speed is important because it determines how quickly data can be transmitted from one device to another. For example, if you are downloading a file from the internet, the download speed will determine how long it takes for the file to finish downloading.

There are a number of factors that can affect data transfer speed, including the type of connection, the distance between the devices, and the amount of traffic on the network.