Huawei Updated H12-711_V4.0 Exam Questions and Answers by camilla

Explanation From HCIA-Security documents:

The question describes a NAT mode that does two things at the same time:

it translates IP addresses and port numbers (so multiple internal hosts can share one public address), and

it specifically uses the public IP address of the outbound interface as the translated address.

That combination matches Easy IP. Easy IP is essentially a convenient form of source NAT/PAT where the device automatically uses the egress interface’s public IP as the post-NAT source address and differentiates internal sessions by translating source ports. This is widely used when an enterprise has one public IP on the WAN interface and many intranet hosts need Internet access.

NAPT is the general concept of translating both address and port, but it does not inherently require using the outbound interface IP; it can use addresses from a configured public address pool. NAT No-PAT translates only addresses without port translation, so it does not fit. “3-tuple NAT” is not the standard match for the specific “use outbound interface public IP” description. Therefore, the correct answer is Easy IP.

A Denial of Service attack is intended to make a host, server, or network service unavailable to legitimate users. It usually works by exhausting system resources such as bandwidth, CPU, memory, connection tables, or buffers, so valid users cannot access the service normally. Therefore, statement B is correct because the essential purpose of a DoS attack is to interrupt services or block resource access on the target.

Statement C is also correct. Many DoS attacks attempt to consume queue space, session resources, or buffers on the target so that new connection requests cannot be processed. This is a common way of making a service unavailable. Statement A can also be correct in the context of some DoS methods, because attackers may use IP spoofing to hide their identity, bypass simple filtering, or increase the difficulty of tracing the attack source.

Statement D is incorrect because DoS attacks are designed to affect availability , not to create unrecoverable physical damage to hardware. They may crash systems, overload services, or interrupt access, but they do not normally destroy the target device physically.