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N10-008 Pruefungssimulationen, N10-008 Examsfragen

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CompTIA Network+ Certification Exam N10-008 Prüfungsfragen mit Lösungen (Q730-Q735):

730. Frage
A local company is planning to upgrade is current wireless network solution to achieve better performance and improve employees' experience. The solution will require a 5GHz radio band to support all current company devices. Which of the following should be considered as an option for the upgrade?

A. 802.11
B. 802.11g
C. 802.11b
D. 802.11n

Antwort: D

Begründung:
The 802.11n standard is the most suitable option for this scenario. It operates in both the 2.4GHz and 5GHz frequency bands, providing better performance and higher data rates compared to older standards like 802.11b and 802.11g.
802.11n (also known as Wi-Fi 4): This standard supports multiple-input and multiple-output (MIMO) technology, which allows for better coverage, increased throughput, and improved reliability. It operates in both the 2.4GHz and 5GHz frequency bands, making it compatible with a wide range of devices. The 5GHz band provides less interference and higher data rates, making it suitable for modern networks.
802.11b: This older standard operates only in the 2.4GHz band and has a maximum data rate of 11 Mbps. It is not recommended for high-performance networks.
802.11g: This standard also operates in the 2.4GHz band and offers a maximum data rate of 54 Mbps. While it is faster than 802.11b, it is still not as efficient as 802.11n.
Reference:
Professor Messer's Network+ Study Guide
CompTIA Network+ N10-008 Study Guide

731. Frage
Users in a remote office report that corporate web server pages are taking a long time to load, whereas users in the main corporate office do not have any issues. Which of the following is the best metric for a network administrator to check?

A. Hop-by-hop network latency
B. Server NetFlow data
C. Jitter across the network
D. Server interface CRC errors

Antwort: A

Begründung:
The best metric for a network administrator to check is hop-by-hop network latency. This is because network latency is the time it takes for a packet to travel from the source to the destination, and it affects the loading speed of web pages. Hop-by-hop network latency measures the latency between each pair of routers or switches along the network path, and it can help identify where the delay is occurring. By checking the hop-by-hop network latency, the network administrator can determine if the problem is caused by a slow or congested link, a misconfigured or faulty device, or a routing issue.
Jitter is the variation in latency over time, and it affects the quality of voice and video applications. Jitter does not directly affect the loading speed of web pages, and it is not a useful metric for troubleshooting this issue.
Server interface CRC errors are errors that occur when the cyclic redundancy check (CRC) of a packet does not match the expected value, indicating data corruption. Server interface CRC errors can affect the reliability and integrity of data transmission, and they can be caused by faulty cables, connectors, or interfaces. Server interface CRC errors do not necessarily affect the loading speed of web pages, unless they are severe enough to cause retransmissions or packet loss.
Server NetFlow data is data that is collected and analyzed by the NetFlow protocol, which monitors and reports on network traffic flows. Server NetFlow data can provide information on the volume, type, and direction of traffic that is sent or received by the server, as well as the source and destination IP addresses, ports, and protocols. Server NetFlow data can help identify network usage patterns, trends, and anomalies, but it does not measure the latency or performance of the network.
Reference
What is Network Latency and How to Measure It
How to Troubleshoot Network Latency Issues
What is Jitter and How to Measure It
What is CRC Error and How to Fix It
What is NetFlow and How Does It Work
CompTIA Network+ Certification All-in-One Exam Guide, Eighth Edition (Exam N10-008)

732. Frage
A help desk technician is troubleshooting a Windows server named SQL.local and wants to check which port a specific application is running on. Which of the following commands should the technician run?

A. traceroute
B. dig
C. netstat
D. arp

Antwort: C

Begründung:
Netstat is a command-line tool that displays active network connections and listening ports on a host. By running the netstat command with appropriate parameters on the Windows server (SQL.local), the technician can view the list of active connections and the associated ports. This will help identify the port on which the specific application is running.

733. Frage
A network technician is configuring a new firewall for a company with the necessary access requirements to be allowed through the firewall. Which of the following would normally be applied as the LAST rule in the firewall?

A. Implicit deny
B. Secure SNMP
C. DHCP snooping
D. Port security

Antwort: A

Begründung:
Implicit deny is a firewall rule that blocks all traffic that is not explicitly allowed by other rules. Implicit deny is usually applied as the last rule in the firewall to ensure that only the necessary access requirements are allowed through the firewall and that any unwanted or malicious traffic is rejected. Implicit deny can also provide a default security policy and a baseline for auditing and logging purposes.
Secure SNMP is a protocol that allows network devices to send event messages to a centralized server or console for logging and analysis. Secure SNMP can be used to monitor and manage the status, performance, and configuration of network devices. Secure SNMP can also help to detect and respond to potential problems or faults on the network. However, secure SNMP is not a firewall rule; it is a network management protocol.
Port security is a feature that allows a switch to restrict the devices that can connect to a specific port based on their MAC addresses. Port security can help to prevent unauthorized access, spoofing, or MAC flooding attacks on the switch. However, port security is not a firewall rule; it is a switch feature.
DHCP snooping is a feature that allows a switch to filter DHCP messages and prevent rogue DHCP servers from assigning IP addresses to devices on the network. DHCP snooping can help to prevent IP address conflicts, spoofing, or denial-of-service attacks on the network. However, DHCP snooping is not a firewall rule; it is a switch feature.

734. Frage
After installing a series of Cat 8 keystones, a data center architect notices higher than normal interference during tests. Which of the following steps should the architect take to troubleshoot the issue?

A. Use passthrough modular crimping plugs instead of traditional crimping plugs.
B. Check to see if the end connections were wrapped in copper tape before terminating.
C. Connect the RX/TX wires to different pins.
D. Run a speed test on a device that can only achieve 100Mbps speeds.

Antwort: B

Begründung:
Cat 8 keystones are shielded to prevent interference from external sources, but they also require proper grounding to avoid interference from within the cable. Wrapping the end connections with copper tape before terminating them is one way to ensure a good ground connection and reduce interference. Using passthrough modular crimping plugs, connecting the RX/TX wires to different pins, or running a speed test on a slow device are not relevant or effective steps to troubleshoot the issue.
Reference:
CompTIA Network+ N10-008 Certification Study Guide, page 191
CompTIA Network+ N10-008 Cert Guide, Deluxe Edition, page 362
CAT8 RJ45 Keystone Problem : r/HomeNetworking2
How to Terminate Cat8 Shielded Keystone Jacks3

735. Frage
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