FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -First, MAC addresses never change and are only used in the local network, while IPs identify network devices globally and can change depending on your location. Also, while MAC addresses are assigned by the hardware manufacturer, IP addresses are assigned by the network admin or ISP (internet service provider).

Detailed explanation-2: -Because they are assigned to NICs or other hardware, MAC addresses never change on their own. (But many network interfaces support MAC address changes.) On the other hand, many IP addresses are dynamic, changing periodically based on time or the particulars of a networking setup.

Detailed explanation-3: -The MAC address is nothing more than the serial number of your Ethernet interface. Most computers have two: WiFi and hard wired. If you are connected through WiFi, and plug in an Ethernet connection, your computer will switch to the hardwired interface, changing it’s active MAC address. It happens all the time.

Detailed explanation-4: -The MAC address that is hard-coded on a network interface controller (NIC) cannot be changed. However, many drivers allow the MAC address to be changed. Additionally, there are tools which can make an operating system believe that the NIC has the MAC address of a user’s choosing.

Detailed explanation-5: -The correct answer is 00-11-20-M1-BC-B0, because the MAC address consists of 6 groups of Hexadecimal characters and the letter M in the 3rd group is the only character that is not a Hexadecimal character.