CIDR وتخطيط العناوين

في هذا الدرس

plan IP address space so nothing overlaps now or later.

الموضوعات المخطط لها

• CIDR notation like 10.20.0.0/16 gives a network prefix; the number after the slash is how many bits are fixed, so a smaller number means a bigger block.
• Private ranges (RFC 1918) are reserved for internal use: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16.
• Overlapping ranges cannot be peered or routed together; fixing it later means re-addressing.
• Plan one master allocation: per environment, per region, per store, plus the data center, with growth headroom.
• Some services reserve addresses in each subnet; leave margin (verify before recording).