- (Topic 3)
A technician is troubleshooting intermittent connectivity between devices and viewing the following syslog entries from a switch:
Which of the following are these entries indicative of?
Correct Answer:
D
The syslog entries are indicative of link flapping, which is when a switch port rapidly transitions between the up and down states. This can cause intermittent connectivity issues, network instability, and increased CPU utilization on the switch. Link flapping can be caused by various factors, such as faulty cables, misconfigured interfaces, duplex mismatches, or network attacks. To troubleshoot link flapping, the technician should check the physical layer, verify the interface settings, and monitor the network traffic for
anomalies. References:
✑ What is Link Flapping? - CompTIA1
✑ Troubleshooting Switch Port and Interface Problems - Cisco2
✑ Network Troubleshooting - N10-008 CompTIA Network+ : 4.1 - YouTube3
- (Topic 3)
A new student is given credentials to log on to the campus Wi-Fi. The student stores the password in a laptop and is able to connect; however, the student is not able to connect with a phone when only a short distance from the laptop. Given the following information:
Which of the following is MOST likely causing this connection failure?
Correct Answer:
B
- (Topic 3)
A network administrator needs to monitor traffic on a specific port on a switch. Which of the following should the administrator configure to accomplish the task?
Correct Answer:
C
Port mirroring is a feature that allows a switch to copy the traffic from one or more ports to another port for monitoring or analysis purposes. Port mirroring can help a network administrator to troubleshoot network problems, detect security threats, or optimize network performance. Port mirroring can be configured on most switches using the command-line interface (CLI) or a graphical user interface (GUI).
References:
✑ CompTIA Network+ N10-008 Certification Exam Objectives, page 51
✑ CompTIA Network+ N10-008 Cert Guide, Chapter 11: Switching Technologies
✑ Port Mirroring - CompTIA Network+ Certification (N10-008): The Total Course [Video]1
✑ CompTIA Network+ N10-005: 2.1 – Port Mirroring - Professor Messer IT Certification Training Courses2
✑ CompTIA Network+ N10-005: 1.4 – Port Mirroring3
- (Topic 3)
Which of the following is a requirement when certifying a network cabling as Cat 7?
Correct Answer:
D
Category 7 (Cat 7) is a cabling standard that supports 10GBASE-T Ethernet connections up to 100 meters (328 feet). In order for a cabling system to be certified as Cat 7, all components, including the patch panel, must meet the TIA/EIA-568-A standard. This standard requires the use of shielded cables with F-type connectors for the network terminations. Reference: CompTIA Network+ Study Manual, 8th Edition, page 158.
- (Topic 3)
A customer runs a DNS lookup service and needs a network technician to reconfigure the network to improve performance. The customer wants to ensure that servers are accessed based on whichever one is topographically closest to the destination. If the server does not respond, then the next topographically closest server should respond Which of the following does the technician need to configure to meet the requirements?
Correct Answer:
B
Anycast addressing is a network addressing and routing methodology in which a single destination address has multiple routing paths to two or more endpoint destinations. Routers will select the desired path on the basis of number of hops, distance, lowest cost, latency measurements or based on the least congested route. Anycast addressing is designed to provide high availability and low latency for services that have multiple instances across the world, such as DNS servers. By using anycast addressing, the customer can ensure that servers are accessed based on whichever one is topographically closest to the destination. If the server does not respond, then the next topographically closest server should respond. References: [CompTIA Network+ Certification Exam Objectives], [Anycast - Wikipedia]