A network has two switches connected together, and each switch has several PCs connected. Users on different switches communicate, but performance is poor. The link between the switches shows a high number of collisions. What is the most likely cause?

The inter-switch link is running half duplex.

The inter-switch cable is too long.

The switches are using different VLANs.

The PCs are in the same collision domain as the inter-switch link.

Which action is the most reliable way to resolve a duplex mismatch on a switch port?

Disable auto-negotiation on the switch port only

Set one end to full-duplex and leave the other to auto-negotiate

Set both ends of the link to the same duplex mode manually

Replace the cable with a crossover cable

A small office has a single switch with all PCs connected directly to it. Users report slow performance during peak hours. The switch shows a high number of collisions on several ports. What is the most effective way to reduce collisions?

Enable full duplex on all switch ports and the connected PCs.

Configure the switch to use half duplex on all ports.

Replace the switch with a hub to isolate each port.

Increase the switch port speed to 1 Gbps.

A technician is troubleshooting a link that is up but has a high number of CRC errors. Which physical inspection step is most appropriate?

Verify the IP address configuration on both ends

Check the cable for damage or excessive length

Check the VLAN configuration on the switch ports

Confirm the default gateway is reachable

A network technician is troubleshooting a link that is up but experiencing intermittent connectivity. The technician runs 'show interface' and sees the following counters: input errors increasing, CRC errors increasing, and runts increasing, but no collisions. The cable is a known-good Cat6 patch cable. What should the technician check next?

Replace the switch port module.

Check the speed and duplex settings on both ends of the link.

Check the cable for physical damage.

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 5)

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 21–25

21application · medium
A network has two switches connected together, and each switch has several PCs connected. Users on different switches communicate, but performance is poor. The link between the switches shows a high number of collisions. What is the most likely cause?
Select an answer first
22foundation · easy
Which action is the most reliable way to resolve a duplex mismatch on a switch port?
Select an answer first
23application · medium
A small office has a single switch with all PCs connected directly to it. Users report slow performance during peak hours. The switch shows a high number of collisions on several ports. What is the most effective way to reduce collisions?
Select an answer first
24foundation · easy
A technician is troubleshooting a link that is up but has a high number of CRC errors. Which physical inspection step is most appropriate?
Select an answer first
25application · medium
A network technician is troubleshooting a link that is up but experiencing intermittent connectivity. The technician runs 'show interface' and sees the following counters: input errors increasing, CRC errors increasing, and runts increasing, but no collisions. The cable is a known-good Cat6 patch cable. What should the technician check next?
Select an answer first

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