A network administrator is troubleshooting slow performance on a network. The administrator reviews the configuration of a router and finds that the MTU is set to 1500 bytes, but the ISP's link has an MTU of 1400 bytes. What is the MOST likely impact of this configuration?

The router will use a larger buffer to accommodate the MTU difference.

The router will drop all packets larger than 1400 bytes.

Packets larger than 1400 bytes will be fragmented, causing increased overhead and potential performance issues.

The router will automatically adjust its MTU to match the ISP's MTU.

What does a high number of CRC errors on an interface indicate?

The interface is operating at full duplex

The device is running out of memory

The interface is receiving too much traffic

Physical layer problems such as cabling or interference

What is a potential effect of a network device running out of memory?

The device will automatically upgrade its firmware

The device may drop packets or crash

The device will increase its throughput

A network administrator notices that a 100 Mbps link is consistently at 95% utilization during business hours. What does this observation most likely indicate?

The link is operating normally with no performance impact

The link is experiencing a physical layer failure

The link is underutilized and has plenty of capacity

The link is saturated and may be causing performance degradation

A network monitoring dashboard shows a switch port with a sustained utilization of 98% and a growing queue depth. What does this combination most likely indicate?

The port is operating normally with no issues

The port is a bottleneck for traffic traversing it

The port is blocked by Spanning Tree Protocol (STP)

The port is experiencing a physical layer fault

CompTIANetwork+

Domain 5Objective 4

Performance Issues N10-009 Practice Questions (Page 2)

Part of the Network troubleshooting domain, which makes up ~15% of our current practice bank. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–2 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

10concepts

Questions 6–10

6expert · hard
A network administrator is troubleshooting slow performance on a network. The administrator reviews the configuration of a router and finds that the MTU is set to 1500 bytes, but the ISP's link has an MTU of 1400 bytes. What is the MOST likely impact of this configuration?
Select an answer first
7foundation · easy
What does a high number of CRC errors on an interface indicate?
Select an answer first
8foundation · easy
What is a potential effect of a network device running out of memory?
Select an answer first
9foundation · easy
A network administrator notices that a 100 Mbps link is consistently at 95% utilization during business hours. What does this observation most likely indicate?
Select an answer first
10foundation · easy
A network monitoring dashboard shows a switch port with a sustained utilization of 98% and a growing queue depth. What does this combination most likely indicate?
Select an answer first

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