การหาค่า ID network(Datacomm)

/26.......2 ยกกำลัง 2 เท่ากับ 4...และ 2 ยกกำลัง 6 เท่ากับ 64
11111111.11111111.11111111.11000000
บิต...เลขฐานสอง...Network ID...Broadcast...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 ยกกำลัง 3 เท่ากับ 8...และ 2 ยกกำลัง 5 เท่ากับ 32
11111111.11111111.11111111.11100000
บิต...เลขฐานสอง...Network ID...Broadcast...IPUsage
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...0000100.......28..........159.......129-158
5...00000101......160.........191.......161-190
6...00000110......192.........223.......193-222
7...00000111......224.........256.......225-255
................................................
/28.......2ยกกำลัง4เท้ากับ16.....2ยกกำลัง4เท่ากับ16
11111111.11111111.11111111.11110000
บิต...เลขฐานฐานสอง ...Network ID..broad cast...IP Usage
0...00000000.....0............15..........1-14 1...00100000.....16...........31..........17-30 2...01000000.....32...........63..........33-62
3...01100000.....64...........79..........65-78 4...10000000.....80...........95..........81-94
5...10100000.....96...........127.........97-126
6...11000000.....128..........159.........129-158
7...11000000.....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.......2ยกกำลัง5เท่ากับ32.... 2ยกกำลัง3เท่ากับ8
11111111.11111111.11111111.11111000
บิต...เลขฐาน ...Network ID...broad cast...IP Usage
0...00000000...0............7............1 -6
1...00100000...8............5............9-14
2...01000000...6............23...........17-22
3...01100000...24...........31...........25-30
4...10000000...32...........39...........33-38
5...10100000...40...........47...........41-46
6...11000000...48...........55...........49-54
7...11000000...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.......2ยกกำลัง6เท่ากับ64 และ 2ยกกำลัง2เท่ากับ4
11111111.11111111.11111111.11111100
บิต...เลขฐานสอง...Network ID...Broadcast...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...0000100.....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
...............................................

การหา ID network

ชุดที่ 1 192.168.2.10/27
IP............... 11000000.10101000.00000010.00001010
subnet mask 11111111.11111111.11111111.11100000
AND............ 11000000.10101000.00000010.00000000
ฐาน10.......... 192.168.2.0192.168.5.10
/27IP............... 11000000.10101000.00000101.00001010
subnet mask 11111111.11111111.11111111.11100000
AND............ 11000000.10101000.00000101.00000000
ฐาน10.......... 192.168.5.0
ดังนั้น ไม่มี NetworkID
ชุดที่ 210.2.100.8/14
IP............... 00001010.00000010.01100100.00001000
Subnet mask 11111111.11111100.00000000.00000000
AND............ 00001010.00000000.00000000.00000000
ฐาน10.......... 10.0.0.010.3.150.9
/14IP............... 00001010.00000011.10010110.0000100
1Subnet mask 11111111.11111100.00000000.00000000
AND............ 00001010.00000000.00000000.00000000
ฐาน10.......... 10.0.0.0
ดังนั้น มี NetworkID คือ 10.0.0.0