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The correct answer is D.

OBJ-5.7: Voice over Internet Protocol (VoIP) performance optimization can help a business improve the quality of its video and audio communications over the Internet by decreasing the size of the broadcast domain through the creation of VLANs. Each VLAN can contain the VoIP devices for a single department or business unit, and traffic is routed between the VLANs using layer 3 multilayer switches to increase the performance of the voice communication systems. Performance optimization helps companies bolster the availability, accessibility, security, and overall performance of their networks. Compliance enforcement involves dividing up one network into smaller sections to better control the flow of traffic across the network and to restrict confidential data to a specific network segment based on a specific regulation or contractual requirement, such as PCI DSS segmentation requirements. A honeynet is an intentionally vulnerable network segment that is used to observe and investigate the attack techniques of a hacker or adversary. Separate public/private networking involves segmenting the network into two portions: public and private. This is often used in cloud architectures to protect private data.

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