A cloud administration team needs to expand the primary IP address range of an existing su… — Google Cloud Associate Cloud Engineer

A cloud administration team needs to expand the primary IP address range of an existing subnet in a custom-mode Virtual Private Cloud (VPC) network. The subnet is currently configured with the primary CIDR block $10.20.1.0/24$ . Which CIDR range can be specified to successfully expand this existing subnet's primary IP range?

$10.20.0.0/23$ Cevap
B
$10.20.1.0/25$
C
$10.20.2.0/24$
D
$10.20.1.128/25$

Cevap

The CIDR range

10.20.0.0/23

correctly expands the existing subnet.

In Google Cloud VPC networks, expanding an existing primary subnet CIDR block requires providing a larger CIDR range (smaller netmask prefix length) that entirely includes the original IP range. The CIDR

10.20.0.0/23

spans from

10.20.0.0

10.20.1.255

, which fully encapsulates the existing

10.20.1.0/24

block.

Adım Adım Çözüm

Identify the existing subnet primary IP range

The current subnet uses

10.20.1.0/24

, which covers IP addresses

10.20.1.0

through

10.20.1.255

Expanding a subnet requires selecting a broader network block that contains the original block.

Evaluate valid expansion constraints in Google Cloud VPC

To expand a primary subnet IP range, the netmask must be decreased (e.g., /24 to /23), and the start of the new block must align properly while containing the original addresses.

Subnet ranges can only be expanded, never shrunk or replaced with non-contiguous blocks.

Verify candidate CIDR blocks

10.20.0.0/23

covers

10.20.0.0

10.20.1.255

, successfully encompassing the original

10.20.1.0/24

block while doubling the available IP capacity.

This meets all VPC primary IP range expansion requirements.

Anahtar Kavram

VPC Subnet Primary CIDR Expansion Rules

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

Sık Yapılan Hatalar

Konular

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