N10-008 practice questions 311–320

1. Question 311 · 871 in bank

   Network traffic is being compromised by DNS poisoning every time a company's router is connected to the internet. The network team detects a non-authorized DNS server being assigned to the network clients and remediates the incident by setting a trusted DNS server, but the issue occurs again after internet exposure. Which of the following best practices should be implemented on the router?

   • AChange the device's default password.
   • BDisable router advertisement guard.
   • CActivate control plane policing.
   • DDisable unneeded network services.

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   Answer: A

   Explanation

   Most of these are good answers, but HOLY COW! You didn't change the default password!? And you connected it to the internet!?

   Source: Adapted from community discussion — Cherubael

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2. Question 312 · 871 in bank

   A user tries to ping 192.168.1.100 from the command prompt on the 192.168.2.101 network but gets the following response: U.U.U.U. Which of the following needs to be configured for these networks to reach each other?

   • ANetwork address translation
   • BDefault gateway
   • CLoopback
   • DRouting protocol

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   Answer: B

   Explanation

   The U.U.U.U is suppose to be 0.0.0.0 and A route when no other route matches The “gateway of last resort” meaning it needs a DG address.

   Source: Adapted from community discussion — [Removed]

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3. Question 313 · 871 in bank

   A network administrator installed a new data and VoIP network. Users are now experiencing poor call quality when making calls. Which of the following should the administrator do to increase VoIP performance?

   • AConfigure a voice VLAN.
   • BConfigure LACP on all VoIP phones.
   • CConfigure PoE on the network.
   • DConfigure jumbo frames on the network.

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   Answer: A

   Explanation

   Did a lil research on it. "Benefits of Voice VLAN It ensures that your VoIP (Voice over Internet Phone) devices do not have to contend directly with all the broadcasts and other traffic from the data VLAN. A voice VLAN can simplify network configuration in some circumstances." https://community.fs.com/blog/auto-voip-vs-voice-vlan-what-s-the-difference.html Jumbo Frames "When jumbo frames on a VoIP/UC network are enabled, it can cause the same kind of delay to your network transmissions." "VoIP uses will always not benefit from jumbo frame, as VoIP like gaming, is latency and time sensitive. Jumbo Frame for Internet Purpose: You will not see any performance boost as the files that came across the internet does not support jumbo frame." https://www.ankmax.com/newsinfo/1358641.html#:~:text=VoIP%20uses%20will%20always%20not,does%20not%20support%20jumbo%20frame. "To summarize this general best practice guide, you should NOT enable jumbo frame feature as a general home user."

   Source: Adapted from community discussion — Xigema

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4. Question 314 · 871 in bank

   A Wi-Fi network was originally configured to be able to handle interference from a microwave oven. The microwave oven was recently removed from the office. Now the network administrator wants to optimize the system to maximize the range of the signal. The main sources of signal degradation are the numerous cubicles and wooden walls between the WAP and the intended destination. Which of the following actions should the administrator take?

   • AImplement CDMA.
   • BChange from omni to directional.
   • CChange the SSID.
   • DChange the frequency.

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   Answer: D

   Explanation

   Initially I thought it was B but it is D because: - the microwave was already removed from the office - the signal is OK now - Notice that the question mentions "numerous cubicles and wooden walls" - meaning the signal now won't have the interference as before - KEY POINT: the admin wants to "maximize the range of the signal:" Manually change the frequency to 2.4 GHz for more reliable speeds and range. While 5 GHz gives you a stronger signal, it doesn't travel through walls or ceilings as well, so it doesn't give you the best range.

   Source: Adapted from community discussion — AntonioTech

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5. Question 315 · 871 in bank

   Select 2

   Which of the following issues are present with RIPv2? (Choose two.)

   • ARoute poisoning
   • BTime to converge
   • CScalability
   • DUnicast
   • EAdjacent neighbors
   • FMaximum transmission unit

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   Answer: BC

   Explanation

   C and B are the issues present with RIPv2. Scalability is an issue with RIPv2 because it is limited to a maximum of 15 hops, which means that it is not suitable for larger networks. Time to converge is an issue because when a link goes down, it can take up to 180 seconds for the entire network to converge and for the new best path to be determined.

   Source: Adapted from community discussion — BeauChateau

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6. Question 316 · 871 in bank

   Select 2

   Which of the following protocols can be used to change device configurations via encrypted and authenticated sessions? (Choose two.)

   • ASNMPv3
   • BSSH
   • CTelnet
   • DIPSec
   • EESP
   • FSyslog

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   Answer: AB

   Explanation

   The protocols that can be used to change device configurations via encrypted and authenticated sessions are: A. SNMPv3 B. SSH SNMPv3 (Simple Network Management Protocol version 3) is a protocol that provides secure access to network devices by encrypting and authenticating SNMP messages. It is used to manage and monitor network devices and can be used to change device configurations. SSH (Secure Shell) is a protocol that provides secure remote access to network devices by encrypting and authenticating sessions between devices. It is commonly used to access and manage network devices, such as routers and switches, and can be used to change device configurations.

   Source: Adapted from community discussion — BigBrainLogic

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7. Question 317 · 871 in bank

   An administrator wants to increase the availability of a server that is connected to the office network. Which of the following allows for multiple NICs to share a single IP address and offers maximum performance while providing fault tolerance in the event of a NIC failure?

   • AMultipathing
   • BSpanning Tree Protocol
   • CFirst Hop Redundancy Protocol
   • DElasticity

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   Answer: A

   Explanation

   The correct answer is A. Multipathing. Multipathing allows multiple physical network connections to a server to share a single IP address, providing both increased performance and fault tolerance in the event of a NIC failure. This is commonly used for servers that require high availability and should be operational at all times. Spanning Tree Protocol (B) and First Hop Redundancy Protocol (C) are network protocols used to provide redundancy and failover capabilities for network switches and routers, but they do not apply to servers directly. Elasticity (D) refers to the ability of a system or application to automatically scale up or down to meet changing demands, and is not directly related to server availability or network connectivity.

   Source: Adapted from community discussion — StellarSteve

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8. Question 318 · 871 in bank

   A network administrator has received calls every day for the past few weeks from three users who cannot access the network. The administrator asks all the users to reboot their PCs, but the same users still cannot access the system. The following day, three different users report the same issue, and the administrator asks them all to reboot their PCs; however, this does not fix the issue. Which of the following is MOST likely occurring?

   • AIncorrect firewall settings
   • BInappropriate VLAN assignment
   • CHardware failure
   • DOverloaded CAM table in switch
   • EDHCP scope exhaustion

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   Answer: E

   Explanation

   Since D is not listed in the CompTIA objectives nor in any of the study materials, the more obvious one is E. They're able to reboot the PC and access the PC system ( I believe there was a typo in this question because they originally cannot access the network not the system) so C is out. DHCP (Dynamic Host Configuration Protocol) assigns IP addresses to users out of a scope that the admin configured for the office according to this scenario, if there's a DHCP failure or scope exhaustion, users wont be able to get an IP address (other than APIPA) in order to access the network.

   Source: Adapted from community discussion — Ali3ngazer

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9. Question 319 · 871 in bank

   A network administrator is investigating a network event that is causing all communication to stop. The network administrator is unable to use SSH to connect to the switch but is able to gain access using the serial console port. While monitoring port statistics, the administrator sees the following:

   

   Which of the following is MOST likely causing the network outage?

   • ADuplicate IP address
   • BHigh collisions
   • CAsynchronous route
   • DSwitch loop

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   Answer: D

   Explanation

   well, hard question this is. How i see it: No on A because it is stated there is an 100% outage. with a dupIP there would be some possible. It will sort of loadbalance ^^. no on B because there arn't any collisions stated in the output. and also there still would be some network connectivity possible. No on C with an Asyn route you can be pretty (a bad word here), it could result in an outage. but probally not the cause for an full network outage and causing all the communication to stop. so the only answer left is then D. when a loop happens, it can cause the situation that is stated. butt....... the information in the picture should have a high utilisation, if it would cause a network outage. but still even if the (bad)data provided, it is the only one that could cause a full outage. if you have better arguments feel free to add those.

   Source: Adapted from community discussion — Dogster

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10. Question 320 · 871 in bank

    A network technician recently installed 35 additional workstations. After installation, some users are unable to access network resources. Many of the original workstations that are experiencing the network access issue were offline when the new workstations were turned on. Which of the following is the MOST likely cause of this issue?

    • AIncorrect VLAN setting
    • BInsufficient DHCP scope
    • CImproper NIC setting
    • DDuplicate IP address

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    Answer: B

    Explanation

    B. Because the network administrator did install 35 new workstations, while there were already old workstations(some online and some offline). Eg. DHCP Scope = 50 ip's (Just an Example) 40 old workstations + 35 new workstations 10 old workstations were offline while the 35 new workstations were connected. So that means 30 old workstations + 35 new workstations = 65 ip's So that means 10 old workstations and 5 new workstations won't connect to the network because of the DHCP Scope that is 50 ip's...

    Source: Adapted from community discussion — Eumousten

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N10-008 practice, question 311. 871 questions available.