A network team wants routers and switches to have consistent timestamps in logs so event correlation is accurate during an outage. Which service should they verify first?

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Network devices such as routers and switches generate logs that include timestamps to record events accurately. For effective troubleshooting and event correlation, these timestamps must be consistent across all devices. The Network Time Protocol (NTP) is the standardized protocol used to synchronize the clocks of network devices to a common time source, typically an authoritative time server. NTP ensures that all devices maintain accurate and consistent time, which is critical for log analysis and network management. In Cisco networking environments, enabling and verifying NTP synchronization on routers and switches is essential for maintaining consistent timestamps. Devices configured with NTP clients regularly query NTP servers to adjust their internal clocks, preventing drift and ensuring uniform time references. Without NTP, devices rely on their internal clocks, which can vary and cause discrepancies in log timestamps, complicating troubleshooting and event correlation. A common exam trap is confusing NTP with other network services that also deal with network management or device communication, such as DNS, SNMP, or CDP. While DNS resolves names to IP addresses, SNMP monitors device status, and CDP discovers neighboring devices, none provide time synchronization. In practical networks, failing to configure NTP leads to inconsistent log timestamps, making it difficult to correlate events during outages or security incidents.

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