A i believe is the answer
When the network stack translates an IP address (network address) to a MAC address (data link address) it sends a broadcast using ARP to all devices on the subnet asking who has the specified IP address. The device with that IP address will then respond with it's MAC address to the ARP message's source.
With this in mind the answer to your question would either be broadcast or ARP request depending on what you have been learning in class.
I don't understand the You tube part, but uh yeah???
Answer: C) Access panel
Explanation:
During the installation process, access panel is used remove by the technician for installation extra 4 GB memory in the laptop. As, window access panel is useful to change the window settings.
We need to access the panel in the laptop to add extra 4 GB memory in the laptop as, the access panel contain the memory banks in the system. Then, open that particular panel for upgrade the memory in the laptop and also remove the unnecessary memory.
