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Zorluk: ZorPrivate IPv4 Addressing and RFC 1918

A network manager is reviewing host IP allocation requests for internal database servers. To ensure non-routable communication over the public Internet according to RFC 1918 standards, the network team must identify valid private host IPv4 addresses. Which of the following IPv4 addresses belong to the RFC 1918 private address space and can be assigned to internal hosts? (Select TWO.)

  1. 10.200.150.75Cevap
  2. 172.29.45.12Cevap
  3. C
    172.35.10.20
  4. D
    192.169.100.1

Cevap

The addresses 10.200.150.75 and 172.29.45.12 belong to the RFC 1918 private IPv4 address space.
The IP addresses 10.200.150.75 and 172.29.45.12 fall directly within the RFC 1918 private IPv4 blocks. 10.200.150.75 is inside the 10.0.0.0/8 block, and 172.29.45.12 is inside the 172.16.0.0/12 block.

Adım Adım Çözüm

1
Recall the RFC 1918 reserved private IPv4 address ranges.
Class A: 10.0.0.0 to 10.255.255.255 (10.0.0.0/8); Class B: 172.16.0.0 to 172.31.255.255 (172.16.0.0/12); Class C: 192.168.0.0 to 192.168.255.255 (192.168.0.0/16).
These specific ranges are reserved by IANA for private enterprise networking and are non-routable over the public Internet.
2
Evaluate candidate address 10.200.150.75.
10.200.150.75 falls between 10.0.0.0 and 10.255.255.255.
It matches the 10.0.0.0/8 private address prefix.
3
Evaluate candidate address 172.29.45.12.
172.29.45.12 falls between 172.16.0.0 and 172.31.255.255.
The second octet 29 is within the range 16 through 31 reserved for RFC 1918 Class B space.
4
Evaluate candidate addresses 172.35.10.20 and 192.169.100.1.
172.35.10.20 (second octet 35 > 31) and 192.169.100.1 (second octet 169 != 168) are outside RFC 1918 boundaries.
Both are globally routable public IPv4 addresses.

Anahtar Kavram

RFC 1918 Private IPv4 Address Ranges
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Private IPv4 Addressing and RFC 1918

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