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Zorluk: ZorPrivate IPv4 Addressing and RFC 1918

A network architect is establishing standard address allocations and boundary checks for an enterprise network redesign. Match each IPv4 address block or prefix range on the left with its corresponding RFC 1918 classification, CIDR specifications, or Internet routing characteristics on the right.

  • 10.0.0.0/810.0.0.0/8A single Class A private block providing 16,777,21616,777,216 total addresses across the range 10.0.0.010.0.0.0 to 10.255.255.25510.255.255.255
  • 172.16.0.0/12172.16.0.0/12A set of 1616 contiguous Class B private /16/16 subnets spanning 172.16.0.0172.16.0.0 to 172.31.255.255172.31.255.255
  • 192.168.0.0/16192.168.0.0/16A set of 256256 contiguous Class C private /24/24 subnets spanning 192.168.0.0192.168.0.0 to 192.168.255.255192.168.255.255
  • 172.32.0.0/11172.32.0.0/11Globally routable public IPv4 address space spanning 172.32.0.0172.32.0.0 to 172.63.255.255172.63.255.255 located outside RFC 1918 boundaries

Cevap

10.0.0.0/8 matches the single Class A private block (10.0.0.0 to 10.255.255.255); 172.16.0.0/12 matches the 16 contiguous Class B private subnets (172.16.0.0 to 172.31.255.255); 192.168.0.0/16 matches the 256 contiguous Class C private subnets (192.168.0.0 to 192.168.255.255); 172.32.0.0/11 matches the globally routable public address space.
Each item matches its corresponding RFC 1918 definition or boundary specification correctly: 10.0.0.0/8 is the single Class A private block, 172.16.0.0/12 spans 16 contiguous Class B private /16 networks (172.16.0.0 - 172.31.255.255), 192.168.0.0/16 spans 256 Class C /24 networks (192.168.0.0 - 192.168.255.255), and 172.32.0.0/11 consists of public addresses immediately above the 172.31.255.255 RFC 1918 upper bound.

Adım Adım Çözüm

1
Identify the Class A RFC 1918 block
10.0.0.0/810.0.0.0/8 encompasses the host range 10.0.0.010.0.0.0 to 10.255.255.25510.255.255.255 (16,777,21616,777,216 addresses).
RFC 1918 reserves one /8/8 prefix in the 10.0.0.0 network space for private internal use.
2
Analyze the Class B RFC 1918 block and boundary limits
172.16.0.0/12172.16.0.0/12 encompasses 16 contiguous /16/16 blocks (172.16.0.0172.16.0.0 through 172.31.255.255172.31.255.255).
The prefix length /12/12 spans from 172.16.0.0172.16.0.0 up to 172.31.255.255172.31.255.255. Addresses starting with 172.32.0.0172.32.0.0 are public.
3
Identify the Class C RFC 1918 block
192.168.0.0/16192.168.0.0/16 encompasses 256 contiguous /24/24 subnets (192.168.0.0192.168.0.0 through 192.168.255.255192.168.255.255).
RFC 1918 defines a single /16/16 prefix block within the 192.168.0.0 space for Class C private addressing.
4
Distinguish public ranges from RFC 1918 private ranges
172.32.0.0/11172.32.0.0/11 starts at 172.32.0.0172.32.0.0, which is beyond the 172.31.255.255172.31.255.255 boundary and is therefore public.
Any IP address in the range 172.32.0.0172.32.0.0 to 172.63.255.255172.63.255.255 is public and routable on the global Internet.

Anahtar Kavram

RFC 1918 Private IPv4 Address Space Ranges and Public Boundaries
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