Section 5.2 Demonstrate your acquired knowledge about if given a scenario, troubleshooting common cabling and physical interface issues. This will demonstrate your proficiency for section 5.2 of the Network+ 10-009 objectives. 1 / 25 A user reports slow connectivity. The switch interface shows increasing CRC errors and runts. What’s a likely issue? IP address conflict Damaged or poorly crimped cable DNS spoofing Incorrect time settings 2 / 25 A Category 5e UTP cable is used in a high-interference environment. What might occur? Crosstalk and EMI causing data corruption VLAN reconfiguration DNS record misalignment Decreased TTL 3 / 25 What is the purpose of checking interface counters on a switch? To update firmware To diagnose physical or transmission layer issues To determine DNS resolution time To scan for malware 4 / 25 Which signal issue is worsened by running copper cables parallel to electrical lines? EMI causing interference DNS leakage VLAN hopping Transceiver mismatch 5 / 25 A newly installed cable run has poor performance. Testing reveals signal loss at specific intervals. What might be the cause? Excessive bending or crushing of the cable VLAN mismatch Static IP assignment Improper DNS records 6 / 25 What might happen if a PoE device is connected using an older 802.3af injector but needs 802.3bt? Overheating Insufficient power delivery Cable attenuation Authentication failure 7 / 25 What condition can cause an Ethernet interface to experience "giants"? Frames larger than the MTU DNS failure Reversed polarity ARP spoofing 8 / 25 How can you avoid TX/RX reversal during cable creation? Use only fiber optic cables Avoid using RJ11 connectors Follow proper T568A/B wiring standards Decrease cable length 9 / 25 A port is “error-disabled.” What is a common reason? Cable is unplugged Interface is in a loopback Security violation or excessive errors Incorrect gateway 10 / 25 Why is Category 6A preferred over Category 5e in modern installations? Lower voltage requirements Smaller cable diameter Higher frequency and reduced crosstalk Lower attenuation 11 / 25 What happens when an Ethernet cable is improperly terminated? IP conflict VLAN assignment error Increased reflections and signal loss MTU mismatch 12 / 25 You discover a transceiver mismatch in a 10GbE connection. What might result? Link failure or severe performance degradation VLAN collision DNS spoofing Port mirroring activation 13 / 25 Which PoE issue could result in a device failing to power up? Power budget exceeded on the switch DHCP timeout Duplex mismatch Attenuation 14 / 25 What does a large number of "drops" in interface statistics indicate? Firewall block Improper DNS resolution Network congestion or buffer overflow VLAN misconfiguration 15 / 25 Which issue is most likely to occur when mixing Cat 5 and Cat 8 cables in the same run? Transceiver mismatch Bandwidth and performance limitations VLAN hopping Excess power draw 16 / 25 What is one of the key symptoms of incorrect transceiver signal strength? VLAN mismatch High collision rates Intermittent connectivity or no link Excessive packet fragmentation 17 / 25 A technician sees the interface status as "suspended." What could cause this? Port security violation or PoE issue Wrong IP configuration Excessive bandwidth usage DNS failure 18 / 25 What issue results from reversed transmit and receive pins on an Ethernet cable? Increased PoE voltage No link or communication failure Signal attenuation Interface CRC mismatch 19 / 25 A cable run is experiencing poor shielding in a high EMI environment. Which type should replace it? UTP STP Category 3 Coaxial 20 / 25 A cable has significant signal degradation due to adjacent cable interference. What is this called? Attenuation Crosstalk Port mirroring Dropping 21 / 25 You notice runts and giants in the interface counters. What should you check first? PoE injector Duplex and speed settings IP helper address Spanning tree protocol 22 / 25 What does an "administratively down" port status typically indicate? The port has been manually disabled in configuration The interface is physically disconnected The cable is incorrect The switch is malfunctioning 23 / 25 Which of the following can result from excessive cable length beyond specifications? Crosstalk Attenuation Runts Port suspension 24 / 25 A technician notices frequent CRC errors on a network interface. What is the most likely cause? Misconfigured VLAN Duplex mismatch Signal interference or damaged cabling Incorrect IP addressing 25 / 25 What problem occurs when a single-mode fiber optic cable is used in place of a multimode cable? Crosstalk increases significantly Signal attenuation improves The signal may not be received properly due to core size mismatch Full-duplex communication is disabled Your score is 0% Restart quiz Return to CompTia N+ 10-009 Objectives
