N10-005 · Question #838
Which of the following can determine the last time an address lease was renewed on a network device?
The correct answer is A. System log. The system log records timestamped DHCP events on a device, including when an address lease was last obtained or renewed.
Question
Which of the following can determine the last time an address lease was renewed on a network device?
Options
- ASystem log
- BPacket sniffer
- CTime domain reflectometer
- DStateful packet filter
How the community answered
(57 responses)- A88% (50)
- B4% (2)
- C2% (1)
- D7% (4)
Why each option
The system log records timestamped DHCP events on a device, including when an address lease was last obtained or renewed.
Operating systems write DHCP client events - including lease acquisition, renewal, and expiration - to the system log with precise timestamps. Reviewing these log entries is the direct way to determine when an IP address lease was last renewed on a specific device.
A packet sniffer captures live network traffic in real time and cannot retrieve historical lease renewal events that occurred before the capture began.
A time domain reflectometer (TDR) is a hardware tool used to detect faults and measure distances in cables, not to inspect DHCP lease history.
A stateful packet filter tracks active connection states for security filtering decisions and does not log or report DHCP lease renewal history.
Concept tested: DHCP lease history via system logging
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/dhcp/dhcp-top
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