CISSP · Question #1349
CISSP Question #1349: Real Exam Question with Answer & Explanation
The correct answer is C: The cable length is excessive.. The most likely cause of the late collisions on a half-duplex link is that the cable length is excessive. A half-duplex link is a communication channel that allows data transmission in one direction at a time. A collision occurs when two devices try to transmit data at the same t
Question
An engineer notices some late collisions on a half-duplex link. The engineer verifies that the devices on both ends of the connection are configured for half duplex. Which of the following is the MOST likely cause of this issue?
Options
- AThe link is improperly terminated
- BOne of the devices is misconfigured
- CThe cable length is excessive.
- DOne of the devices has a hardware issue.
Explanation
The most likely cause of the late collisions on a half-duplex link is that the cable length is excessive. A half-duplex link is a communication channel that allows data transmission in one direction at a time. A collision occurs when two devices try to transmit data at the same time on the same channel, resulting in corrupted or lost data. A late collision occurs when a collision is detected after the first 64 bytes of the frame have been transmitted, indicating a problem with the physical layer of the network. One possible cause of late collisions is that the cable length is too long, exceeding the maximum distance allowed by the network standard. This can cause signal degradation, propagation delay, and synchronization issues, leading to late collisions.
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