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Diffstat (limited to 'src/content/cidr-guide.md')
| -rw-r--r-- | src/content/cidr-guide.md | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/src/content/cidr-guide.md b/src/content/cidr-guide.md index 38fe8b2..1ba0da7 100644 --- a/src/content/cidr-guide.md +++ b/src/content/cidr-guide.md @@ -1,9 +1,3 @@ -# CIDR Calculator & Subnet Guide - -Convert CIDR blocks to IP ranges and master subnetting for IPv4 & IPv6—all in one place. - ---- - ## What is CIDR? **Classless Inter-Domain Routing (CIDR)** is the system that replaced the old class-A/B/C scheme in 1993. @@ -43,10 +37,10 @@ Subnetting seems daunting until you break it into four predictable moves: 3. **List subnet starts** 0, 64, 128, 192 4. **Pick your block** Usable hosts = block size − 2 (62 in a /26) -> **Example** -> Split `172.16.0.0/16` into at least 10 equal subnets. -> *Need ≥10 blocks → 4 extra bits (2⁴ = 16)* -> New prefix = **/20**. Each /20 holds 4094 hosts. +> **Example** +> Split `172.16.0.0/16` into at least 10 equal subnets. +> *Need ≥10 blocks → 4 extra bits (2⁴ = 16)* +> New prefix = **/20**. Each /20 holds 4094 hosts. > Ranges begin 172.16.0.0, 172.16.16.0, 172.16.32.0 … to 172.16.240.0. --- @@ -71,4 +65,3 @@ Toggle **IPv6** in the calculator and try `2001:db8::/48` to explore the range g * RFC 4632 — *Classless Inter-Domain Routing for IPv6* * RFC 1519 — *CIDR Address Allocation for IPv4* * [cidr.xyz source code](https://github.com/yuvadm/cidr.xyz) -* *Subnetting Examples* blog series (coming soon) |