“Are you from Russia?” means “Ты из России?” (“Ty iz Rossii?”) in Russian. You also can ask whether a person is Russian. “Are you Russian?” is “Ты русский?” (“Ty russkiy?”) in Russian. But it’s not a correct question in some way in Russia since there are about 200 peoples there. So technically a person is Russian because he is from Russian, he was born in Russia. But he can be a representative of one of the 200 peoples. He can be a Tatar, Bashkir, Yakut, etc.