A network engineer is troubleshooting a link between two switches. The link is up, but 'show interface' on both switches shows a high number of CRC errors and late collisions on the same interface. The engineer checks the configuration and finds that one switch has 'duplex full' configured, while the other is set to auto-negotiation. What should the engineer do to resolve the issue?

Configure the auto-negotiating switch port to 'duplex full' to match the other switch.

Change the speed on one switch to 10 Mbps.

Set both switches to half duplex.

Replace the cable between the switches.

A network technician replaces a faulty access switch and connects a user's PC to it. The PC's NIC is configured for 100 Mbps full duplex, while the switch port defaults to auto-negotiation. The link comes up, but the user reports slow performance and intermittent connectivity. The technician checks the switch port counters and sees a high number of late collisions and CRC errors, but no speed mismatch. What is the most likely cause and the correct fix?

The cable is faulty; replace the patch cable and re-test the link.

The switch port is set to 10 Mbps; change the switch port speed to 100 Mbps.

The switch port negotiated to half duplex; configure the port to match the PC at 100 Mbps full duplex.

The PC's NIC is failing; replace the NIC and re-test the link.

A technician connects a device that only supports 10 Mbps to a switch port that is configured with 'speed auto' and 'duplex auto'. The link comes up, but the switch shows the port as 10 Mbps half duplex. What is the most likely reason?

The device is forcing full duplex, but the switch cannot support it.

The device does not support auto-negotiation, so it defaults to half duplex.

The cable is faulty, forcing a lower duplex setting.

The switch is configured to prefer half duplex.

A network administrator is troubleshooting a link between a router and a switch. The link is up, but the administrator sees a high number of input errors on the router's interface and a high number of output errors on the switch's interface. The router is configured for 100 Mbps full duplex, and the switch port is set to auto-negotiation. What is the most likely cause?

Speed mismatch between the router and switch.

Faulty cable between the router and switch.

Duplex mismatch between the router and switch.

The router's interface is failing.

CiscoCertified Network Associate (CCNA)

Domain 1Objective 4

1.4 Identify Interface and Cable Issues (collisions, Errors, Mismatch Duplex, And/or Speed) 200-301 Practice Questions (Page 4)

Part of the Network Fundamentals domain, which accounts for 20% of the 200-301 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 1–1 from this objective — we provide 40 practice questions to prepare you well beyond it. (estimate)

40questions here

8free pages

6concepts

20%of the exam

Questions 16–20

16application · medium
A network engineer is troubleshooting a link between two switches. The link is up, but 'show interface' on both switches shows a high number of CRC errors and late collisions on the same interface. The engineer checks the configuration and finds that one switch has 'duplex full' configured, while the other is set to auto-negotiation. What should the engineer do to resolve the issue?
Select an answer first
17foundation · easy
Which show command displays the interface status, speed, duplex, and input/output error counters on a Cisco IOS switch?
Select an answer first
18application · medium
A network technician replaces a faulty access switch and connects a user's PC to it. The PC's NIC is configured for 100 Mbps full duplex, while the switch port defaults to auto-negotiation. The link comes up, but the user reports slow performance and intermittent connectivity. The technician checks the switch port counters and sees a high number of late collisions and CRC errors, but no speed mismatch. What is the most likely cause and the correct fix?
Select an answer first
19application · medium
A technician connects a device that only supports 10 Mbps to a switch port that is configured with 'speed auto' and 'duplex auto'. The link comes up, but the switch shows the port as 10 Mbps half duplex. What is the most likely reason?
Select an answer first
20application · medium
A network administrator is troubleshooting a link between a router and a switch. The link is up, but the administrator sees a high number of input errors on the router's interface and a high number of output errors on the switch's interface. The router is configured for 100 Mbps full duplex, and the switch port is set to auto-negotiation. What is the most likely cause?
Select an answer first

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1.4 Identify Interface and Cable Issues (collisions, Errors, Mismatch Duplex, And/or Speed) 200-301 Practice Questions (Page 4)

Questions 16–20

Which show command displays the interface status, speed, duplex, and input/output error counters on a Cisco IOS switch?

A technician connects a device that only supports 10 Mbps to a switch port that is configured with 'speed auto' and 'duplex auto'. The link comes up, but the switch shows the port as 10 Mbps half duplex. What is the most likely reason?

Keep studying — Network Fundamentals