Who exactly decides whether to deploy a standard Layer 2 switch or an advanced Layer 3 multilayer switch when architecting a modern local area network? Furthermore, these intelligent hardware components form the core backbone of a wired infrastructure, processing and selectively forwarding data packets exclusively to their intended destinations using localized MAC address tables. Why does segmenting a network into separate virtual LANs remain the primary operational strategy for modern network engineers looking to mitigate broadcast storms and isolate sensitive data traffic?