computer systems

Question 1

Convert the denary number 221 into 8 bit binary.

Answer 1

11011101

Question 2

Convert the hexadecimal number 2F into denary.

Answer 2

16 (2 * 16 + 15), or converting to binary first (0010 1111).47

Question 3

Convert the binary number 10110000 into hexadecimal.

Answer 3

B0

Question 4

Identify how many unique values can be represented by 4 bits.

Answer 4

16

Question 5

Perform a binary shift of 3 places right on the binary number 10001110.

Answer 5

00010001

Question 6

What does the program counter(PC) do?

Answer 6

Stores the address of the next instruction to be fetched from
memory. Increments during each fetch-execute cycle.

Question 7

What does WAN stand for?

Answer 7

Wide Area Network.

Question 8

What does LAN stand for?

Answer 8

Local Area Network.

Question 9

Explain why Ethernet is a standard.

Answer 9

Ethernet is used by (mostly) all manufacturers //
Ethernet is used in many devices
* To allow compatibility with other devices
* Ethernet has a high bandwidth
* Ethernet has inbuilt security
* Ethernet is a proven/reliable connection
* Ethernet is low cost for
purchase/installation/maintenance (compared to other wired connections).

Question 10

Identify one other factor that can affect the performance of the network.

Answer 10

Receive packets
* Forward/sending/transmitting packets
* Maintain a routing table // by description
* Identify the most efficient path to the destination
/ correct IP / correct location
* Assign IP addresses to nodes/devices
* Converts packets from one protocol to another.