Free N10-008 Questions Attempt

• Throughput is the measure of how much data can be transferred over a network in a given time period1.
• To test the throughput of a network connection, a network administrator needs a tool that can generate and measure traffic between two endpoints2.
• iPerf is a command-line tool that can create TCP or UDP streams and measure the bandwidth, delay, jitter, and packet loss of the network23.
• iPerf can be used to test the performance of various network protocols, such as metro Ethernet, which is a type of Ethernet network that spans metropolitan areas and provides high-speed connectivity to businesses and organizations.
• iPerf can also be used to verify that the network connection meets the service level agreement (SLA), which is a contract that defines the quality and availability of the network service provided by a vendor or a carrier.
• Ping is a tool that can test the reachability and latency of a network device by sending and receiving ICMP echo packets. Ping cannot measure the throughput of a network connection, as it only tests the round-trip time of a single packet.
• NetFlow is a protocol that can collect and analyze network traffic data, such as source and destination IP addresses, ports, protocols, and bytes transferred. NetFlow can provide information about the volume and type of network traffic, but it cannot measure the throughput of a specific network connection, as it does not generate or monitor traffic streams.
• Netstat is a tool that can display information about the active and listening network connections, such as protocol, local and foreign address, and state. Netstat cannot measure the throughput of a network connection, as it only shows the status of the existing connections. References:
• 1: CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 1: Introduction to Networks, p. 14
• 2: CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 16: Network Optimization, p. 649
• 3: iPerf - The ultimate speed test tool for TCP, UDP and SCTP
• : CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 3: Ethernet Networks, p. 105
• : CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 15: Network Monitoring, p. 611
• : CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 4: IP Addressing, p. 143
• : Ping (networking utility) - Wikipedia
• : CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 15: Network Monitoring, p. 615
• : NetFlow - Wikipedia
• : CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 16: Network Optimization, p. 650
• : [netstat - Wikipedia]

"One final usage of the TXT resource record is how some cloud service providers, such as Azure, validate ownership of custom domains. You are provided with data to include in your TXT record, and once that is created, the domain is verified and able to be used. The thought is that if you control the DNS, then you own the domain name."

The technician was identifying the problem by gathering information with this note. This is the first step of the troubleshooting methodology, which is a systematic process of finding and resolving issues in a network or system. By gathering information, the technician can understand the symptoms, scope, and impact of the problem, as well as collect relevant data from various sources, such as users, logs, tools, or documentation. The note shows that the technician was asking questions to the user, checking the network status and configuration, and reviewing previous tickets to gather information about the problem. References: [CompTIA Network+ Certification Exam Objectives], Troubleshooting Methodology - CompTIA Network+ N10-007 - 1.4 | Professor Messer IT Certification Training Courses

The signal-to-noise ratio (SNR) is the difference between the received wireless signal and the noise floor, which is the level of background noise on the spectrum. A high SNR means a good signal quality, while a low SNR means a poor signal quality. The noise floor can be affected by various sources of interference, such as cordless phones, microwaves, radar, etc. To troubleshoot a wireless connection issue caused by a low SNR, the technician should first identify and remove any electronics that might be causing interference in the area. This would improve the SNR and the wireless performance. Running diagnostics on the relevant devices, moving the access point to a different location, or escalating the issue to the vendor’s support team are possible steps to take after removing the interference sources, but not the next step. References:

• Signal-to-Noise Ratio (SNR) and Wireless Signal Strength
• Wireless: SNR, RSSI and Noise basics of wireless troubleshooting
• What is Signal-to-Noise Ratio and How to Measure it
• Network + N10-008 practice exam
• CompTIA N10-008 Free Certification Exam Material
• Free Practice Questions for CompTIA Network+Exam (N10-008)