subnetting
DESCRIPTION
TRANSCRIPT
0-127
128-255
0-34-78-11
12-1516-1920-2324-2728-3132-3536-3940-4344-4748-5152-5556-5960-6364-6768-7172-7576-7980-8384-8788-9192-9596-99
100-103104-107108-111112-115116-119120-123124-127128-131132-135136-139140-143144-147148-151152-155156-159160-163164-167168-171172-175176-179180-183184-187188-191192-195196-199200-203204-207208-211212-215216-219220-223224-227228-231232-235236-239240-243244-247248-251252-255
/308+8+8+6
255.255.255.2524 Hosts
/298+8+8+5
255.255.255.2488 Hosts
/288+8+8+4
255.255.255.24016 Hosts
/278+8+8+3
255.255.255.22432 Hosts
/268+8+8+2
255.255.255.19264 Hosts
/258+8+8+1
255.255.255.128128 Hosts
/248+8+8
255.255.255.0256 Hosts
0-7
8-15
16-23
24-31
32-39
40-47
48-55
56-63
64-71
72-79
80-87
88-95
96-103
104-111
112-119
120-127
128-135
136-143
144-151
152-159
16-167
168-175
176-183
184-191
192-199
200-207
208-215
216-223
224-231
232-239
240-247
248-255
0-15
16-31
32-47
48-63
64-79
80-95
96-111
112-127
128-143
144-159
160-175
176-191
192-207
208-223
224-239
240-255
0-63
64-127
128-191
192-255
0-255
IP Address Breakdown
79
/24255.255.255.0
256 Hosts1 Subnet
Start with a square. The whole squareis a single subnet comprised of 256addresses.
Visualizing Subnets UsingThe Box Method
The box method is the simplest way to visualize the breakdown ofsubnets and addresses into smaller sizes.
/25255.255.255.128
128 Hosts2 Subnets
/26255.255.255.192
64 Hosts4 Subnets
80
Split the box in half and you get twosubnets with 128 addresses,
Divide the box into quarters and youget four subnets with 64 addresses,
81
/27255.255.255.224
32 Hosts8 Subnets
Split each individual square and youget eight subnets with 32 addresses,
/30255.255.255.252
4 Hosts64 Subnets
/29255.255.255.248
8 Hosts32 Subnets
/28255.255.255.240
16 Hosts16 Subnets
Split the boxes in half again and youget sixteen subnets with sixteenaddresses,
The next split gives you thirty twosubnets with eight addresses,
The last split gives sixty four subnetswith four addresses each,