Company acquired another company and their IP addressing is overlapping with yours. What can you do to allow users from acquired company to access your resources?

The correct answer is C. Use NAT with a pool of addresses. When two merged networks have overlapping IP address space, NAT must be used to resolve addressing conflicts before traffic can flow between them. Using NAT with a pool of addresses (Option C) is the most practical scalable solution - each user (or connection) from the acquired…

Advanced Addressing and Routing Solutions

Question

Options

AReIP the network
B1-1 NAT
CUse NAT with a pool of addresses
DNAT overload

How the community answered

(25 responses)

A
4% (1)
C
96% (24)

Explanation

When two merged networks have overlapping IP address space, NAT must be used to resolve addressing conflicts before traffic can flow between them. Using NAT with a pool of addresses (Option C) is the most practical scalable solution - each user (or connection) from the acquired company is translated to a unique IP from a defined pool before entering your network, avoiding any address collision. This allows many users to simultaneously access your resources. Option A (re-IPing) is extremely disruptive. Option B (1-to-1 NAT) can work but requires a unique static mapping per host, which is operationally intensive at scale. Option D (NAT overload/PAT) uses a single IP with port multiplexing, which is acceptable for outbound internet access but problematic when corporate resources need to track individual source IPs or when many simultaneous sessions are needed.

Topics

#NAT#overlapping IP#address translation#network acquisition

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