Subnet mask 且Rues Address 172 16 0 0 NETWORK. NETWORK. NETWORK. SM HOST Octet (8 bits). Octet (8 bits), Octet(8 bits), Octet (8 bits) 255255 0 0 2552552550 11111111111111111111111111aa Use host bits, starting at th SUBNET FIELD NEW HOST FIEL high order bit position. Decimal Equivalents of Bit Patterns Class B Subnet Planning Example 2 100111 26625625018:111111100 1111110 11111111 e Broadcast Address = 172.16.2.2s-2.254 e Eight bits of subnetting Subnet Masks with Subnets Fourth Octet of a Class Network 12121010100001010 Fr式 Subnetwork000 00000 thru 11111 0 thru.31 2552555401111000 Third Subnetwork 0000ouil64hu.95 101011000000000 JoIl 00000 thru 11111 .96 thru 127 Fifth Subnetwork 100 00ou.128thru159 network number extended by seven bits Seventh Subnetwork 110 Jo0000 thru 11111. thru.22312 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 67 Rules 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 68 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 69 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 70 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 71 哈工大计算机学院 李全龙 Network Application Development 1: Introduction 72 Eighth Subnetwork 111 00000 thru 11111 .224 thru .255 Seventh Subnetwork 110 00000 thru 11111 .192 thru .223 Sixth Subnetwork 101 00000 thru 11111 .160 thru .191 Fifth Subnetwork 100 00000 thru 11111 .128 thru .159 Fourth Subnetwork 011 00000 thru 11111 .96 thru .127 Third Subnetwork 010 00000 thru 11111 .64 thru .95 Second Subnetwork 001 00000 thru 11111 .32 thru .63 First Subnetwork 000 00000 thru 11111 .0 thru .31 Fourth Octet of a Class "C" Network