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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.

Network operations

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)
  • A
    88% (50)
  • B
    4% (2)
  • C
    2% (1)
  • D
    7% (4)

Why each option

The system log records timestamped DHCP events on a device, including when an address lease was last obtained or renewed.

ASystem logCorrect

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.

BPacket sniffer

A packet sniffer captures live network traffic in real time and cannot retrieve historical lease renewal events that occurred before the capture began.

CTime domain reflectometer

A time domain reflectometer (TDR) is a hardware tool used to detect faults and measure distances in cables, not to inspect DHCP lease history.

DStateful packet filter

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

Topics

#DHCP lease#system logs#address management#log analysis

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