Which two practices are recommended for an acceptable security posture in a network?

Answer B,E is correct: B. maintain network equipment in a secure location; E. Disable unused or unnecessary ports, interfaces and services. A sound security posture begins with reducing exposed attack surfaces and physically protecting infrastructure. Maintaining network equipment in a secure location prevents unauthorized console access, cable tampering, device theft, and rogue hardware insertion. Disabling unused or unnecessary ports, interfaces, and services reduces the number of places an attacker can connect or the number of services that can be exploited. A cryptographic keychain can be useful for routing-protocol authentication, but it is not a broad posture practice compared with physical protection and surface reduction. Placing internal file and email servers in a DMZ is usually not appropriate because a DMZ is for systems intentionally exposed to less-trusted networks. Cisco CCNA 200-301 v1.1 Security Fundamentals emphasizes these baseline controls because they prevent simple access-layer and management-plane compromises before more advanced controls are even considered.