Examkin

Soru

Zorluk: OrtaWired and Wireless Network Issues

A field technician is troubleshooting a newly deployed desktop computer in a healthcare clinic. The computer can successfully communicate with devices on its local subnet, but throughput to local servers is severely degraded below 10 Mbps on a 1 Gbps connection. Interface statistics on the network switch port reveal a rapidly increasing count of late collisions and frame alignment errors. Which of the following is the MOST likely cause of this issue?

  1. A duplex mismatch between the workstation network card and the switch portCevap
  2. B
    An unassigned IP address causing the system to default to APIPA auto-configuration
  3. C
    An incorrect default gateway IP address assigned by the DHCP server
  4. D
    Co-channel interference caused by adjacent wireless access points operating on 2.4 GHz

Cevap

A duplex mismatch between the workstation network card and the switch port
A duplex mismatch occurs when one end of an Ethernet link operates in full-duplex mode while the other operates in half-duplex mode. The full-duplex side transmits packets without checking for carrier sense, causing the half-duplex side to detect collisions mid-transmission (late collisions) and report frame alignment errors, leading to severe throughput degradation.

Adım Adım Çözüm

1
Analyze reported network symptoms
Local subnet connectivity is functional, but transfer speeds are abnormally low (<10 Mbps on a 1 Gbps link).
Identifies that physical layer link is established, but data link operations are failing under load.
2
Evaluate switch interface diagnostic logs
High count of late collisions and alignment errors detected.
Late collisions occur when one side transmits under the assumption of full-duplex (no CSMA/CD checking) while the connected peer operates in half-duplex (listening for collisions).
3
Match diagnostic errors to root cause
A speed/duplex mismatch between Ethernet endpoints causes late collisions and degraded throughput.
Correcting speed and duplex settings to match on both ends (or enabling auto-negotiation on both sides) resolves late collision errors.

Anahtar Kavram

Wired Network Performance and Duplex Mismatches
Bu soruyu puanla

Konular

Wired and Wireless Network Issues

Bu konudan daha fazla soru