take the bits for host and do 2 to the power to host bits - 2 Memorize Table ---------------- 2 2 = 4 | ---------------- 2 3 = 8 | ---------------- 2 4 = 16 | ---------------- 2 5 = 32 | ---------------- 2 6 = 64 | ---------------- 2 7 = 128 | ---------------- 2 8 = 256 | ---------------- 2 9 = 512 | ---------------- 2 10 = 1024 | ---------------- 2 11 = 2048 | ---------------- 2 12 = 4096 | ---------------- 2 13 = 8192 | ---------------- 2 14 = 16384 | ---------------- 2 15 = 32768 | ---------------- 2 16 = 65536 | ----------------