N10-008 practice questions 71–80

1. Question 71 · 871 in bank

   A systems administrator wants to use the least amount of equipment to segment two departments that have cables terminating in the same room. Which of the following would allow this to occur?

   • AA load balancer
   • BA proxy server
   • CA Layer 3 switch
   • DA hub
   • EA Layer 7 firewall

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   Answer: C

   Explanation

   A Layer 3 switch would allow this to occur, as it can segment the two departments by creating virtual LANs (VLANs) and routing traffic between them. A Layer 3 switch is a type of switch that can perform routing functions in addition to switching. It can use the network layer (Layer 3) of the OSI model to route traffic between different VLANs, which allows for the segmentation of different departments or networks within the same physical space. By creating VLANs for each department and using the Layer 3 switch to route traffic between them, the administrator can segment the two departments without the need for additional equipment.

   Source: Adapted from community discussion — JakeCharles

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2. Question 72 · 871 in bank

   An administrator needs to connect two laptops directly to each other using 802. 11ac but does not have an AP available. Which of the following describes this configuration?

   • ABasic service set
   • BExtended service set
   • CIndependent basic service set
   • DMU-MIMO

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   Answer: C

   Explanation

   independent BSS (IBSS), or ad hoc network, is created by peer devices among themselves without network infrastructure. I vote for C to be the right answer as there will be peer to peer communication with out the AP as the question states.

   Source: Adapted from community discussion — Schizo

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3. Question 73 · 871 in bank

   A network administrator is reviewing the following metrics from a network management system regarding a switchport. The administrator suspects an issue because users are calling in regards to the switch port's performance:

   

   Based on the information in the chart above, which of the following is the cause of these performance issues?

   • AThe connected device is exceeding the configured MTU.
   • BThe connected device is sending too many packets.
   • CThe switchport has been up for too long.
   • DThe connected device is receiving too many packets.
   • EThe switchport does not have enough CRCs.

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   Answer: A

   Explanation

   A is the correct answer. MTU stands for "Maximum Transmission Unit," the maximum IP packet/Ethernet frame size that can traverse the network. For Ethernet networks, the MTU size is 1500 bytes, and anything larger than 1500 bytes is called a giant. According to the image, the connected device is outputting packets larger than 1500 bytes, which will cause Giants. Additionally, there are more packets outputted than packets inputted, which suggests that the switch has been dropping those packets. B and D are incorrect; this will cause network slowdowns with the overall switch and the transmitting device itself, not a specific interface on the switch. C has nothing to do with the slowdown. Many network devices today (especially Cisco devices) can have a very long uptime and still process and forward packets/frames. E is incorrect because you do not want CRCs. CRC is "Cyclic Redundancy Check," and it is the extra 4 bytes added to the end of an Ethernet frame for error-checking. If an Ethernet frame becomes corrupted, then the interface will show a CRC error, and it will drop the frame.

   Source: Adapted from community discussion — [Removed]

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4. Question 74 · 871 in bank

   A network administrator is installing a new server in the datacenter. The administrator is concerned the amount of traffic generated will exceed 1GB, and higher- throughput NICs are not available for installation. Which of the following is the BEST solution for this issue?

   • AInstall an additional NIC and configure LACP
   • BRemove some of the applications from the server
   • CConfigure the NIC to use full duplex
   • DConfigure port mirroring to send traffic to another server
   • EInstall a SSD to decrease data processing time

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   Answer: A

   Explanation

   Link Aggregation Protocol Control (LAPC) facilitates port aggregation to improve redundancy and performance; this is also known as NIC teaming, apropos to this question.

   Source: Adapted from community discussion — Orean

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5. Question 75 · 871 in bank

   A malicious user is using special software to perform an on-path attack. Which of the following best practices should be configured to mitigate this threat?

   • ADynamic ARP inspection
   • BRole-based access
   • CControl plane policing
   • DMAC filtering

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   Answer: A

   Explanation

   Mike Meyers "A classic on-path attack would be a person using special software on a wireless network to make all the clients think his laptop is an access point. He could then listen in on that wireless network, gathering up all the conversations and gaining access to passwords, shared keys, or other sensitive information. On-path attacks are commonly perpetrated using ARP spoofing." "The way to mitigate ARP spoofing, described in Objective 4.2, is through dynamic ARP inspection. ARP replies are checked against a database, and if they contain invalid or conflicting values, they are dropped. Therefore, they won’t be sent by switches to hosts, those ARP caches would subsequently be poisoned."

   Source: Adapted from community discussion — LeonardSnart

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6. Question 76 · 871 in bank

   Which of the following can be used to store various types of devices and provide contactless delivery to users?

   • AAsset tags
   • BBiometrics
   • CAccess control vestibules
   • DSmart lockers

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   Answer: D

   Explanation

   An access control vestibule is part of a physical access control system that typically provides a space between two sets of interlocking doors. Vestibules are designed to prevent unauthorized individuals from following authorized individuals into facilities with controlled access. The answer is D, as a smart locker provides contactless delivery.

   Source: Adapted from community discussion — Schizo

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7. Question 77 · 871 in bank

   A technician recently set up a small office network for nine users. When the installation was complete, all the computers on the network showed addresses ranging from 169.254.0.0 to 169.254.255.255. Which of the following types of address ranges does this represent?

   • APrivate
   • BPublic
   • CAPIPA
   • DClassless

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   Answer: C

   Explanation

   Automatic Private IP Addressing (APIPA) is a feature in Windows operating systems that enables computers to automatically self-configure an IP address and subnet mask when their DHCP server isn’t reachable. The IP address range for APIPA is 169.254.0.1-169.254.255.254, and the subnet mask is 255.255.0.0.

   Source: Adapted from community discussion — kungfuseven

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8. Question 78 · 871 in bank

   Which of the following OSI model layers is where a technician would view UDP information?

   • APhysical
   • BData link
   • CNetwork
   • DTransport

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   Answer: D

   Explanation

   D. Transport. The transport layer, specifically the User Datagram Protocol (UDP) is responsible for end-to-end communication and data transfer between applications on different devices. It's in this layer where a technician would view UDP information.

   Source: Adapted from community discussion — JakeCharles

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9. Question 79 · 871 in bank

   A user reports being unable to access network resources after making some changes in the office. Which of the following should a network technician do FIRST?

   • ACheck the system's IP address
   • BDo a ping test against the servers
   • CReseat the cables into the back of the PC
   • DAsk what changes were made

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   Answer: D

   Explanation

   The first thing you should do when beginning to troubleshoot an issue is gather as much information as you can from customers involved with the order.

   Source: Adapted from community discussion — Mehsotopes

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10. Question 80 · 871 in bank

    A network technician at a university is assisting with the planning of a simultaneous software deployment to multiple computers in one classroom in a building. Which of the following would be BEST to use?

    • AMulticast
    • BAnycast
    • CUnicast
    • DBroadcast

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    Answer: A

    Explanation

    A is the correct answer. Multicast is "communication from one device to only systems that interested in receiving the information." The network technician wants to deploy software to only computers that should receive the software, so multicast is the correct answer. B is incorrect because anycast is "communication from one device that is an option out of many." Anycast communication is delivered to the closest interface, but the network technician wants to deploy it to all computers that need the software. Thus, anycast will not work. C is incorrect because unicast is "communication one device to another and no one else." Unicast is a direct one-to-one communication commonly used for web browsing and file transfers, but we want to deploy the software on the necessary computers as quickly as possible. Thus, unicast will not work. D is incorrect because broadcast is "communication from one device to everyone at once." Broadcast is a one-to-all communication commonly used in our Ethernet networks for the DHCP DORA process, ARP, NDP, etc. We do not want unnecessary to computers to receive the software deployment, so broadcast will not work.

    Source: Adapted from community discussion — [Removed]

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N10-008 practice, question 71. 871 questions available.