Cable Types

Question 1

Bits

Answer 1

Now, it’s important to remember that the computers measure storage and data transfer rates in terms of bits.
Now, in computers, the term bit refers to a binary digit.

• A single bit can store only one of two values either a one or a zero.
• If we combine four bits together, we get what’s called a nibble
• and if we combine eight bits together, we get a byte.

Question 2

Data

Answer 2

For example, let’s say I have a file that contains 50 bits of data.
I would write that file size as 50 bits or 50b with a lowercase b.

Now, if I was going to send that file to you and it took me two seconds to send it, I would then say that my data transfer rate or the speed of my data transfer was 25 bits per second or 25bps.

Notice I had a 50-bit file that took two seconds to transfer, so if you take 50 bits and divide that by two seconds, this gives you a data transfer rate of 25 bits per second.

Question 3

Bytes/Byt

Answer 3

Now, if we have 1,000 bits,

we can call this one kilobit or 1Kb.

If we can transfer data at one kilobit per second,

we would then write this down as 1Kbps.

On the other hand, if I wanted to write this

in terms of bytes, which has eight bits for each byte,

I would say that I have 125 bytes.
but when I use a big B, it stands for bytes.

So if you have 1 million bits,

you would have one Mb, with a little b,

but if you had 1 million bytes,

you would have one MB, with a big B

and this is one megabyte.

Now, if you had 1 billion bits,

you would have one gigabit or one Gb.

If you have 1 billion bytes,

you would have one gigabyte or one capital G, capital B.

Now, if you have 1 trillion bits,

you’re going to have a terabit or Tb.

Question 4

Bytes/Byts

Answer 4

For example, let’s say I’m going to sell you internet service to your home and I give you the choice of two different options from two different companies.
The first one was a one gigabit per second connection for $99 per month or one little g, little b, and the second choice I’m going to give you is for a 250-gigabyte connection or capital G, capital B for that same $99, which one should you choose?

Well, you should choose the 250 gigabytes per second connection or capital G, capital B, why?
Because even though the 250 looks smaller than the 1,000 gigabits, remember that that big B means it is actually eight times larger than the little b, so 250 gigabytes per second is really two thousand gigabits per second when you take 250 times eight, so it’s actually going to be double the speed of the one gigabit connection for the exact same cost of $99 per month.
So keep that in mind as we go through this section

Question 5

Cables