The notation used to represent MAC address is hexadecimal number.
Media access control address (MAC address) is a unique address assigned to a network interface controller (NIC) or network adapter. MAC addresses are also known as hardware addresses or physical addresses.
MAC addresses are 12-digit hexadecimal numbers (48 bits or 6 byte in length). MAC address allow computers to uniquely identify themselves.
Therefore hexadecimal numbers are used to represent MAC address.
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Answer:
Errors.
Explanation:
Angelika should focus on fixing the errors so that her ads can be shown. Because of the errors the code will not compile fully either be it run time error or compile time error or syntax error or any other error.
Warnings shows the potential problems but the code will run even if there are warnings and the notifications are not to worry about.