The example FEB8077911AB12TB is being represented as hexadecimal. Hexadecimal is a number system that uses 16 symbols to represent values from 0 to 15.
The symbols are 0-9 for values from 0 to 9, and A-F for values from 10 to 15.
Hexadecimal is often used to represent binary data in a more compact and readable form, such as MAC addresses, color codes, or memory addresses.
A MAC address is a unique identifier for a network interface card (NIC) that consists of 12 hexadecimal digits separated by colons or dashes.
A string is a sequence of characters that can be used to store text or other data types.
A string can contain hexadecimal digits, but it can also contain other symbols or characters.
Unicode is a standard for encoding characters from different languages and scripts into binary data.
Unicode can use hexadecimal digits to represent characters, but it also requires other symbols or codes to indicate the encoding scheme.
References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 2: IT Concepts and Terminology1