CIDR CIDR (Classless Inter-Domain Routing) wijst IP-adressen toe en routeert internetverkeer met prefixnotatie (/N).
Veelvoorkomende CIDR-subnetbereiken
| CIDR-prefix | Subnetmasker | Totaal adressen | Bruikbare hosts | Voorbeeldbereik |
|---|---|---|---|---|
/32 |
255.255.255.255 |
1 | 1 | 192.168.1.1 (Enkele host) |
/30 |
255.255.255.252 |
4 | 2 | 10.0.0.0 – 10.0.0.3 (Punt-naar-punt verbinding) |
/28 |
255.255.255.240 |
16 | 14 | 192.168.1.0 – 192.168.1.15 |
/26 |
255.255.255.192 |
64 | 62 | 192.168.1.0 – 192.168.1.63 |
/24 |
255.255.255.0 |
256 | 254 | 192.168.1.0 – 192.168.1.255 |
/20 |
255.255.240.0 |
4,096 | 4,094 | 172.16.0.0 – 172.16.15.255 |
/16 |
255.255.0.0 |
65,536 | 65,534 | 10.0.0.0 – 10.0.255.255 |
/8 |
255.0.0.0 |
16,777,216 | 16,777,214 | 10.0.0.0 – 10.255.255.255 |
/0 |
0.0.0.0 |
4,294,967,296 | All | 0.0.0.0/0 (Standaardroute / Gehele internet) |
Privé IPv4-adresblokken (RFC 1918)
- 24-bits blok (10.0.0.0/8): 10.0.0.0 – 10.255.255.255 (16,7M adressen)
- 20-bits blok (172.16.0.0/12): 172.16.0.0 – 172.31.255.255 (1M adressen)
- 16-bits blok (192.168.0.0/16): 192.168.0.0 – 192.168.255.255 (65.536 adressen)
- Loopback (127.0.0.0/8): 127.0.0.1 (Localhost)
- Link-Local (169.254.0.0/16): Automatisch toegewezen bij DHCP-fout