N10-008 practice questions 411–420

1. Question 411 · 871 in bank

   A network administrator is concerned about a rainbow table being used to help access network resources. Which of the following must be addressed to reduce the likelihood of a rainbow table being effective?

   • APassword policy
   • BRemote access policy
   • CAcceptable use policy
   • DData loss prevention policy

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   Answer: A

   Explanation

   Rainbow tables are tables of reversed hashes used to crack password hashes. Computer systems requiring passwords typically store the passwords as a hash value of the user's password. When a computer user enters a password, the system hashes the password and compares it to the stored hash.

   Source: Adapted from community discussion — BayOne

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2. Question 412 · 871 in bank

   Which of the following describes the ability of a corporate IT department to expand its cloud-hosted VM environment with minimal effort?

   • AScalability
   • BLoad balancing
   • CMultitenancy
   • DGeo-redundancy

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   Answer: A

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3. Question 413 · 871 in bank

   A customer calls the help desk to report that a Windows PC is unable to open any websites or access any server shares. The help desk technician suspects there is an issue with the configuration. Which of the following commands should the technician issue FIRST to troubleshoot the issue?

   • Atracert
   • Bnetstat
   • Carp
   • Dipconfig
   • Enmap

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   Answer: D

   Explanation

   D. ipconfig is the command that the help desk technician should issue first to troubleshoot the issue with the Windows PC. The ipconfig command is used to display the IP configuration of a network interface on a Windows system. By running ipconfig, the technician can check if the PC has a valid IP address, subnet mask, default gateway, and DNS server settings. This information will help identify any configuration issues that may be causing the problem with accessing websites or server shares.

   Source: Adapted from community discussion — rah555

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4. Question 414 · 871 in bank

   A network technician needs to select an AP that will support at least 1.3Gbps and 5GHz only. Which of the following wireless standards must the AP support to meet the requirements?

   • AB
   • BAC
   • CAX
   • DN
   • EG

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   Answer: B

   Explanation

   I think the people who voted for 802.11n are CompTIA employees. The answer is very clearly 802.11ac, since 802.11ac Wave 1 supports 1.3 Gbps and runs on 5 GHz only, whereas 802.11n runs on both 2.4 and 5 GHz and only reaches 600 Mbps max. On one of the few questions with crystal-clear, unambiguous wording and an obvious solution, we get a 50/50 split on votes. Incredible.

   Source: Adapted from community discussion — [Removed]

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5. Question 415 · 871 in bank

   Which of the following devices would be used to extend the range of a wireless network?

   • AA repeater
   • BA media converter
   • CA router
   • DA switch

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   Answer: A

   Explanation

   A. A repeater A repeater is a device used to extend the range of a wireless network by amplifying and retransmitting the signals.

   Source: Adapted from community discussion — salah112

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6. Question 416 · 871 in bank

   Which of the following redundant devices creates broadcast storms when connected together on a high-availability network?

   • ASwitches
   • BRouters
   • CAccess points
   • DServers

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   Answer: A

   Explanation

   I think it is switches, as when you create redundant links, you must configure STP (Spanning Tree Protocol) to avoid broadcast storms and loops. It does this by putting the redundant links on standby mode, and only when the main link goes down will it "activate" the standby link. That is my understanding, I am still learning so correct me if I am wrong.

   Source: Adapted from community discussion — Molongo

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7. Question 417 · 871 in bank

   A technician is investigating a misconfiguration on a Layer 3 switch. When the technician logs in and runs a command, the following data is shown:

   

   Which of the following commands generated this output?

   • Ashow route
   • Bshow config
   • Cshow interface
   • Dtcpdump
   • Enetstat -s

   Show answer

   Answer: A

   Explanation

   The command that generated this output is "show route". The output shows the routing table entries for the switch, with the network address, next hop IP address, and outgoing interface for each route. This information is used by the switch to determine the best path for forwarding packets to their destination.

   Source: Adapted from community discussion — rah555

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8. Question 418 · 871 in bank

   An IT technician is working on a support ticket regarding an unreachable website. The technician has utilized the ping command to the website, but the site is still unreachable. Which of the following tools should the technician use NEXT?

   • Aipconfig
   • Btracert
   • Carp
   • Dnetstat

   Show answer

   Answer: B

   Explanation

   Use Traceroute or MTR: Traceroute (Windows) or MTR (Linux/macOS) can provide more detailed information about the network path between your computer and the web server. This can help identify where the connection is failing.

   Source: Adapted from community discussion — actingnurse1

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9. Question 419 · 871 in bank

   A network device is configured to send critical events to a syslog server; however, the following alerts are not being received: Severity 5 LINK-UPDOWN: Interface 1/1, changed state to down Severity 5 LINK-UPDOWN: Interface 1/3, changed state to down Which of the following describes the reason why the events are not being received?

   • AThe network device is not configured to log that level to the syslog server
   • BThe network device was down and could not send the event
   • CThe syslog server is not compatible with the network device
   • DThe syslog server did not have the correct MIB loaded to receive the message

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   Answer: A

   Explanation

   The correct answer is A. The syslog severity levels are 0 (Emergency), 1 (Alert), 2 (Critical), 3 (Error), 4 (Warning), 5 (Notice/Notification), 6 (Information), and 7 (Debugging). An easy mnemonic to memorize this is "Emus Are Cute Even When In Disguise." Because the device is set to send CRITICAL events, it will send only events that have a severity level of 2 and below. Thus, you have to configure the device to send events at severity level 5 or higher. B is incorrect because, presumably, the device would not have logged any events when an interface has gone down or up. C is incorrect because the server is already able to receive events that have a severity level of 2 and below. If it was not compatible, then no logs would have been received. D is incorrect because Management Information Bases (MIBs) are used for SNMP, not syslog.

   Source: Adapted from community discussion — [Removed]

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10. Question 420 · 871 in bank

    An ISP configured an internet connection to provide 20Mbps, but actual data rates are occurring at 10Mbps and causing a significant delay in data transmission. Which of the following specifications should the ISP check?

    • AThroughput
    • BLatency
    • CBandwidth
    • DJitter

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    Answer: A

    Explanation

    The ISP should check the Throughput. Throughput refers to the actual speed of data transfer that is achieved. It’s often less than the maximum bandwidth due to various factors like network congestion or errors. So, even though the bandwidth is set at 20Mbps, the throughput might be lower, which seems to be the case here. The other terms, Latency, Bandwidth, and Jitter, refer to different aspects of network performance. Latency is the delay in data transmission, Bandwidth is the maximum rate of data transfer, and Jitter is the variation in latency. But in this case, Throughput is the most relevant to the issue described.

    Source: Adapted from community discussion — Jay987654

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N10-008 practice, question 411. 871 questions available.