Troubleshooting Network Communication for IP Camera
Question
A technician has installed an older IP camera as a temporary replacement for a recently failed newer one.
The technician notices that when the camera's video stream is off, the ping roundtrip time between the camera and the network DVR is consistently less than 1ms without dropped packets.
When the camera video stream is turned on, the ping roundtrip time increases dramatically, and network communication is slow and inconsistent.
Which of the following is MOST likely the issue in this scenario?
A.
VLAN mismatch B.
Duplex mismatch C.
Cat 6 RX/TX reversed D.
Damaged cable.
B.
Explanations
A technician has installed an older IP camera as a temporary replacement for a recently failed newer one.
The technician notices that when the camera's video stream is off, the ping roundtrip time between the camera and the network DVR is consistently less than 1ms without dropped packets.
When the camera video stream is turned on, the ping roundtrip time increases dramatically, and network communication is slow and inconsistent.
Which of the following is MOST likely the issue in this scenario?
A.
VLAN mismatch
B.
Duplex mismatch
C.
Cat 6 RX/TX reversed
D.
Damaged cable.
B.
Based on the scenario given, the most likely issue is a duplex mismatch.
Duplex refers to the two-way communication capabilities of a network link. There are two modes of duplex communication: half-duplex and full-duplex. In half-duplex, the network link can transmit and receive data, but not at the same time. In full-duplex, the network link can transmit and receive data simultaneously.
A duplex mismatch occurs when two devices are connected with different duplex settings. For example, one device may be set to full-duplex while the other is set to half-duplex. When this happens, the devices may experience packet loss, slow network communication, and other performance issues.
In the scenario given, the technician noticed that the ping roundtrip time between the camera and the network DVR is consistently less than 1ms without dropped packets when the camera's video stream is off. This suggests that the network link is capable of fast, reliable communication when the camera is not transmitting data. However, when the camera video stream is turned on, the ping roundtrip time increases dramatically, and network communication is slow and inconsistent. This behavior is consistent with a duplex mismatch, where the network link is struggling to handle the increased data flow caused by the camera video stream.
Therefore, the most likely issue in this scenario is a duplex mismatch between the IP camera and the network DVR.
