If multiple ECS instances need to actively access the public network, the most efficient way to save EIPs is to apply for a NAT gateway and configure SNAT rules to allow multiple hosts to share the…

Question

Options

• ATrue
• BFalse

• A
  81% (22)
• B
  19% (5)

Explanation

Using a NAT gateway with SNAT (Source Network Address Translation) rules is exactly the right approach when multiple ECS instances need outbound internet access - it allows all instances in a VPC to share a single Elastic IP (EIP), rather than assigning one EIP per instance, which would be costly and wasteful. SNAT works by translating each instance's private IP to the shared public IP when traffic leaves the network, making the solution both scalable and cost-efficient. Option B (False) is incorrect because the statement is technically and architecturally sound - this is actually a well-established best practice in cloud networking, not a misconception.

Memory tip: Think of NAT + SNAT as a "traffic funnel" - many private instances pour outbound traffic through one public IP. If you need inbound access to specific instances, that's DNAT (Destination NAT); SNAT is for outbound (Source = the private instance sending out).

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