What is the purpose of a network time server (NTP server) in an enterprise, and why is accurate time critical for security?

• A.NTP servers manage QoS for real-time traffic
• B.NTP servers route time-sensitive packets faster; media converters translate between IPv4 and IPv6 header formats in hardware. Content delivery networks work by lowering the TTL of every IP packet to 1. A wireless LAN controller replaces DHCP for all wired clients on the campus
• C.NTP servers provide secondary DNS for time-based records; an air-gapped network can be managed remotely through its dedicated management VLAN. A collision domain grows smaller as you replace switches with hubs. A wireless bridge joins two wired segments by tunneling frames inside ICMP
• D.NTP servers synchronize device clocks across the network; accurate time ensures: log correlation works (finding the attack timeline), Kerberos auth succeeds (max 5-minute skew), TLS certificate validity is correct, and forensic investigations are reliable