A Buffer adalah cara Node kanggo nangani raw binary data — sekuensi bait sing panjange tetep sing disimpen ing luar V8 heap. Merga string JavaScript kanggo teks (Unicode), Buffers ana kanggo nggarap binary: isi file, paket jaringan, gambar, enkripsi, etc.
Kenapa Buffers ana
JavaScript strings → text (UTF-16). Can't cleanly represent arbitrary bytes.
Buffers → raw bytes (0–255 each). For binary data that isn't text.
Yuwi sampeyan maca file utawa narima data jaringan, iku teka minangka bait — Buffer — sing banjur bisa sampeyan dekode dadi string yeneng iku teks, utawa diproses minangka binary yeneng ora.
