/26 = 2*2 = 4 , 2*6= 64 (* ยกกำลัง)
.......เลขฐาน 2..........Network ID...........broad cast........IP Usage
0.....00000000.........0.........................63..................1-62
1.....00000001.........64.......................127.................65-126
2.....00000010.........128.....................191.................129-190
3.....00000011.........192.....................255.................193-254
/27 = 2*3 = 8 , 2*5= 32 (* ยกกำลัง)
.......เลขฐาน 2...........Network ID...........broad cast........IP Usage
0.....00000000.........0.........................31..................1-30
1.....00000001.........32.......................63..................33-62
2.....00000010.........64.......................95..................65-94
3.....00000011.........96.......................127.................97-126
4.....00000100.........128.....................159.................129-158
5.....00000101.........160.....................191.................161-190
6.....00000110.........192.....................223.................193-222
7.....00000111.........224.....................225.................225-254
/28 = 2*4=16, 2*4=16 (* ยกกำลัง)
.......เลขฐาน2............Network ID...........broad cast........IP Usage
0.....00000000.........0........................15...................1-14 1.....00000001.........16.......................31..................17-30 2.....00000010.........32.......................63..................33-62
3.....00000011.........64.......................79..................65-78 4.....00000100.........80.......................95..................81-94
5.....00000101.........96.......................127................97-126
6.....00000110.........128.....................159................129-158
7.....00000111.........160.....................191................160-190
8.....00001000.........192.....................207................193-206
9.....00001001.........208.....................223................209-222
10...00001010.........224.....................239................225-238
11...00001011.........240.....................255................241-254
12...00001100.........256.....................271................257-270
13...00001101.........272.....................287................273-286
14...00001110.........288.....................303................289-302
15...00001111.........304.....................319................305-318
16...00010000.........320.....................335................321-334
/29 = 2*5=32, 2*3=8 (* ยกกำลัง)
.......เลขฐาน2............Network ID..........broad cast.......IP Usage
0.....00000000.........0........................7..................1 -6
1.....00000001.........8.......................15.................9-14
2.....00000010.........16.....................23.................17-22
3.....00000011.........24.....................31.................25-30
4.....00000100.........32.....................39.................33-38
5.....00000101.........40.....................47.................41-46
6.....00000110.........48.....................55.................49-54
7.....00000111.........56.....................63.................57-62
8.....00001000.........64.....................71.................65-70
9.....00001001.........72.....................79.................73-78
10...00001010.........80.....................87................. 81-86
11...00001011.........88.....................95.................89-94
12...00001100.........96.....................103...............97-102
13...00001101........104....................111...............105-110
14...00001110........112....................119...............113-118
15...00001111........120....................127...............121-126
16...00010000........128....................135...............129-134
17...00010001........136....................143...............137-142
18...00010010........144....................151...............145-150
19...00010011........152....................159...............153-158
20...00010100........160....................167...............161-166
21...00010101........168....................175...............169-174
22...00010110........176....................183...............177-182
23...00010111........184....................191...............185-190
24...00011000........192....................199...............193-198
25...00011001........200....................207...............201-206
26...00011010........208....................215...............209-214
27...00011011........216....................223...............217-222
28...00011100........224....................231...............225-230
29...00011101........232....................239...............233-240
30...00011110........240....................247...............241-248
31...00011111........248....................255...............249-256
/30 = 2*6=64, 2*2=4 (* ยกกำลัง)
.......เลขฐาน2..........Network ID..........broad cast.......IP Usage
0.....00000000........0.......................3....................1-2
1.....00000001........4.......................7....................5-6
2.....00000010........8.......................11..................9-10
3.....00000011.......12......................15..................13-14
4.....00000100.......16......................19..................17-18
5.....00000101.......20......................23..................21-22
6.....00000110.......24......................27..................25-26
7.....00000111.......28......................31..................29-30
8.....00001000.......32......................35..................33-34
9.....00001001.......36......................39..................37-38
10...00001010.......40......................43..................41-42
11...00001011.......44......................47..................45-46
12...00001100.......48......................51..................49-50
13...00001101.......52......................55..................53-54
14...00001110.......56......................59..................57-58
15...00001111.......60......................63..................61-62
16...00010000.......64......................67..................65-66
17...00010001.......68......................71..................69-70
18...00010010.......72......................75..................73-74
19...00010011.......76......................79..................77-78
20...00010100.......80......................83..................81-82
21...00010101.......84......................87..................85-86
22...00010110.......88......................91..................89-90
23...00010111.......92......................95..................93-94
24...00011000.......96......................99..................97-98
25...00011001.......100....................103................101-102
26...00011010.......104....................107................105-106
27...00011011.......108....................111................109-110
28...00011100.......112....................115................113-114
29...00011101.......116....................119................117-118
30...00011110.......120....................123................121-122
31...00011111.......124....................127................125-126
32...00100000.......128....................131................129-130
33...00100001.......132....................135................133-134
34...00100010.......136....................139................137-138
35...00100011.......140....................143................141-142
36...00100100.......144....................147................145-146
37...00100101.......148....................151................149-150
38...00100110.......152....................155................153-154
39...00100111.......156....................159................157-158
40...00101000.......160....................163................161-162
41...00101001.......164....................167................165-166
42...00101010.......168....................171................169-170
43...00101011.......172....................175................173-174
44...00101100.......176....................179................177-178
45...00101101.......180....................183................181-182
46...00101110.......184....................187................185-186
47...00101111.......188....................191................189-190
48...00110000.......192....................195................193-194
49...00110001.......196....................199................197-198
50...00110010.......200....................203................201-202
51...00110011.......204....................207................205-206
52...00110100.......208....................211................209-210
53...00110101.......212....................215................213-214
54...00110110.......216....................219................217-218
55...00110111.......220....................223................221-222
56...00111000.......224....................227................225-226
57...00111001.......228....................231................229-230
58...00111010.......232....................235................233-234
59...00111011.......236....................239................237-238
60...00111100.......240....................243................241-242
61...00111101.......244....................247................245-246
62...00111110.......248....................251................249-250
63...00111111.......252....................255................253-254
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