Pada kali ini saya akan menjelaskan cara mencari Network, Broadcast,Use, Range dan Netmask pada IP Kelas C. IP Address Kelas C sering digunakan untuk jaringan komputer berukuran kecil seperti LAN ( Local Area Network ).
Prefix Kelas C
/31 = 2 /27 = 32
/30 = 4 /26 = 64
/29 = 8 /25 = 128
/28 = 16 /24 = 256
Rumus :
IP Acuan / nilai prefix = hasil bagi
Network = hasil bagi x nilai prefix
Broadcast = Network + ( nilai prefix - 1 )
Contoh Soal :
1. 10.10.10.1/27
2. 10.10.11.10/26
3. 10.10.12.100/25
4. 10.10.13.246/28
5. 10.10.14.254/29
Jawaban :
1. 10.10.10.1/27
/27 = 32
1/32=0
Network:0 x 32 = 0 IP N = 10.10.10.0
Broadcast : 0 + ( 32 - 1 ) = 31 IP B = 10.10.10.31
Jumlah IP = 2 ( 32 - 27 )
= 2⁵ = 32
Netmask = 255.255.255. ( 256 - 32 )
= 255.255.255.224
IP Range = 10.10.10. ( 0 + 1 )
10.10.10. ( 31 - 1 )
10.10.10. 1 - 10.10.10.30
USE = 10.10.10.30
2. 10.10.11.10/26
/26 = 64
10 / 64 = 0
Network : 0 x 64 = 0 IP N = 10.10.11.0
Broadcast : 0 + ( 64 - 1 ) = 63 IP B = 10.10.11.63
Jumlah IP = 2 ( 32 - 26 )
= 2 ⁶ = 64
Netmask = 255.255.255. ( 256 - 64 )
= 255.255.255. 192
IP Range = 10.10.11. ( 0 + 1 )
10.10.11. ( 63 - 1 )
10.10.11.1 - 10.10.11. 62
USE = 10.10.11.62
3. 10.10.12.100/25
/25 = 128
100/128 = 0
Network : 0 x 128 = 0 IP N = 10.10.12.0
Broadcast : 0 + ( 128 - 1 ) = 127 IP B = 10.10.12.127
Jumlah IP = 2^ ( 32 - 25 )
= 2⁷ = 128
Netmask = 255.255.255. ( 256 - 128 )
255.255.255. 128
IP Range = 10.10.12. ( 0 + 1 )
10.10.12. ( 127 - 1 )
10.10.12.1 - 10.10.12.126
USE = 10.10.12.126
4. 10.10.13.246/28
/28 = 16
246/16 = 15
Network : 15 x 16 = 240 IP N = 10.10.13.240
Broadcast : 240 + ( 16 - 1 ) = 255 IP B = 10.10.13.255
Jumlah IP = 2 ^ ( 32 - 28 )
= 2⁴ = 16
Netmask = 255.255.255. ( 256 - 16 )
255.255.255. 240
IP Range = 10.10.13. ( 240 + 1 )
10.10.13. ( 255 - 1 )
10.10.13.241 - 10.10.13.254
USE = 10.10.13.254
5. 10.10.14.254/29
/29 = 8
254/8 = 31
Network = 31 x 8 = 128 IP N = 10.10.14.128
Broadcast = 248 + ( 8 - 1 ) = 255 IP B = 10.10.14.255
Jumlah IP = 2 ^ ( 32 - 29 )
= 2 ³ = 8
Netmask = 255.255.255. ( 256 - 8 )
255.255.255. 246
IP Range = 10.10.14. ( 128 + 1 )
10.10.14. ( 255 - 1 )
10.10.14.129 - 10.10.14.254
USE = 10.10.14.154
Sekian contoh soal dan pembahasannya.
Semoga dapat bermanfaat.
Wassalamu'alaikum wr. wb
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