<Jeremy's IT Lab> Day13: Subnetting(Part1)
2025. 3. 24. 23:47ㆍCS/CCNA
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Subnetting(Part1)
point-to-point network (Router - Router)
CIDR requirements of Class A - C were removed
2^n - 2 = usable addresses (1 Network address, 1 Broadcast address)
| Dotted Decimal | CIDR Notion |
| 255.255.255.128 | /25 |
| 255.255.255.192 | /26 |
| 255.255.255.224 | /27 |
| 255.255.255.240 | /28 |
| 255.255.255.248 | /29 |
| 255.255.255.252 | /30 |
| 255.255.255.254 | /31 (x) |
| 255.255.255.255 | /32 (x) |
Acronym:
- CIDR : Classless Inter-Domain Routing
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