The international phonetic alphabet takes each letter in the alphabet and assigns a word to it that cannot be easily confused with any other word in the system. It is most commonly used in radio communication when conditions like static and interference might make it difficult to tell what is being said. ("Did you say B or D?"). Used by the military, commercial air and sea transport, ham radio, and film crews. It can also be used to spell out whole words if the person you're talking to really can't hear you. And, yes, while you could just pick any random word that begins with the letter you are trying to convey, there is one set of substitutions that will be recognized by anyone who knows their shit, anywhere.
So I'll just ask you each letter of the alphabet (I'll even do it in order so I don't confuse you) and you tell me what the substitution is. Do it from memory. If you go and look it up on the web, you'll get a 100, but what will that prove?
PS if you are in the fields of speech pathology or linguistics, PLEASE do not send me a message saying "That's not IPA. IPA is a system that assigns a symbol to every possible sound the human voice can produce blah blah blah." I've already heard it. Kindly accept the fact that two different things can have the same name and leave me the fuck alone.