fastest 10-seconds subnetting trick for ccna exam - find any subnet within 10 seconds guaranteed Published 7 years ago • 128K plays • Length 15:41 Download video MP4 Download video MP3 Similar videos 5:41 subnetting made simple 3:47 ip address network and host portion | subnet mask explained | ccna 200-301 free | 9:15 17. how to find all subnet numbers 8:04 16. how to find the number of subnets valid hosts