N10-008 practice questions 821–830

1. Question 821 · 871 in bank

   A network engineer has added a new route on a border router and is trying to determine if traffic is using the new route. Which of the following commands should the engineer use?

   • Aping
   • Barp
   • Ctrace
   • Droute

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   Answer: C

   Explanation

   C. trace The trace command, commonly known as traceroute, is used to trace the path that packets take from the source to the destination. By running a traceroute to a destination that should be using the new route, the engineer can see the actual path the packets are taking and verify if they are following the intended new route. ping is useful for checking basic connectivity but does not provide information about the path the traffic takes. arp is used for mapping IP addresses to MAC addresses, which is not relevant to checking the path of traffic. route shows the current routing table, but it does not confirm if traffic is actually using a specific route.

   Source: Adapted from community discussion — dadba8c

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2. Question 822 · 871 in bank

   A network technician is troubleshooting VoIP calls that have jumbled and distorted audio. The network technician analyzes the voice VLAN traffic and determines packets on the voice VLAN are being received out of order. Which of the following network metrics are causing the VoIP issues?

   • AJitter
   • BBandwidth
   • CLatency
   • DDelay

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   Answer: A

   Explanation

   Jitter refers to the variability in packet arrival times. When packets arrive out of order or with significant delays between them, it can lead to jumbled and distorted audio in VoIP calls. This is because VoIP relies on timely and orderly packet delivery to maintain the quality of the audio stream. B. Bandwidth: While insufficient bandwidth can cause issues with VoIP, it typically results in dropped calls or reduced audio quality rather than packets being out of order. C. Latency: High latency can cause delays in audio but does not typically result in packets being received out of order. D. Delay: While delay affects the time it takes for packets to travel from source to destination, it does not specifically address the issue of packets arriving out of order, which is more directly related to jitter.

   Source: Adapted from community discussion — a87d6a4

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3. Question 823 · 871 in bank

   Which of the following should be used to associate an IPv6 address with a domain name?

   • AAAAA
   • BA
   • CSOA
   • DTXT

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   Answer: A

   Explanation

   The AAAA record is used in DNS to associate an IPv6 address with a domain name. This record type maps a domain name to an IPv6 address, similar to how an A record maps a domain name to an IPv4 address. B. A: The A record maps a domain name to an IPv4 address, not an IPv6 address. C. SOA: The Start of Authority (SOA) record provides information about the DNS zone, including the primary name server and contact email, but it does not map domain names to IP addresses. D. TXT: The TXT record is used to hold arbitrary text data for various purposes, such as verification or configuration information, but it does not associate domain names with IP addresses.

   Source: Adapted from community discussion — a87d6a4

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4. Question 824 · 871 in bank

   Users report they cannot reach any websites on the internet. An on-site network engineer is able to duplicate the issue on a different PC. The network engineer then tries to ping a website and receives the following message Ping request could not find host www.google.com. Please check the name and try again. Which of the following is the next step the engineer should take?

   • APing 127.0.0.l to test local hardware.
   • BTest the website from outside the company.
   • CPing internal name server functionality.
   • DCheck internet firewall logs for blocked DNS traffic.

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   Answer: C

   Explanation

   Since the error message indicates that the ping request could not find the host, the issue likely relates to DNS resolution. Pinging the internal name server helps verify whether the DNS server is reachable and functioning properly. If the internal DNS server is not reachable or not working correctly, it would prevent domain names from being resolved to IP addresses, leading to the error reported. A. Ping 127.0.0.1 to test local hardware: This tests the local loopback interface to ensure the TCP/IP stack is functioning, but it does not address DNS resolution issues directly. B. Test the website from outside the company: While this can confirm if the website is accessible externally, it does not directly address the internal DNS resolution problem. D. Check internet firewall logs for blocked DNS traffic: This could be relevant if there were specific indications of DNS issues, but verifying internal DNS server functionality is a more immediate step to identify if DNS resolution is the problem.

   Source: Adapted from community discussion — a87d6a4

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5. Question 825 · 871 in bank

   Which of the following devices allows local, high-speed Ethernet traffic to be transmitted over twisted-pair telephone lines for WAN connectivity?

   • AMedia converter
   • BWLAN controller
   • CRepeater
   • DDSL modem

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   Answer: D

   Explanation

   A DSL modem (Digital Subscriber Line modem) allows local, high-speed Ethernet traffic to be transmitted over twisted-pair telephone lines for WAN connectivity. DSL modems are designed to utilize the existing telephone lines for high-speed internet access, separating voice and data traffic. A. Media converter: This device converts signals from one media type to another (e.g., fiber to copper) but does not specifically address transmitting Ethernet traffic over twisted-pair telephone lines. B. WLAN controller: A WLAN controller manages wireless access points and does not handle WAN connectivity over telephone lines. C. Repeater: A repeater amplifies signals to extend the range of a network but does not convert or transmit Ethernet traffic over telephone lines.

   Source: Adapted from community discussion — a87d6a4

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6. Question 826 · 871 in bank

   A network administrator is troubleshooting a network connectivity issue. The workstation can connect to the internet but not to internal network resources. Which of the following is most likely the cause of the issue?

   • AAPIPA address
   • BRogue DHCP server
   • CUnreachable DNS server
   • DIncorrect NAT settings

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   Answer: C

   Explanation

   NAT makes no sense in this context. It's meant to translate a local IP into a public one to get multiple local devices to access internet. This is literally the opposite of the question that states they can ONLY connect to the INTERNET. I think a rogue DHCP would most likely cut all connection, if you get in a completely wrong subnet, you obviously won't access internal, and NAT won't work, since the router won't expect it. C is probably the sensible answer. External names could be resolved and not internal ones.

   Source: Adapted from community discussion — ETQ

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7. Question 827 · 871 in bank

   Which of the following is associated with the session layer of the OSI model?

   • AData representation
   • BPackets
   • CSockets
   • DFrames

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   Answer: C

   Explanation

   Sockets are associated with the session layer of the OSI model, as they are used to establish, manage, and terminate connections between applications. The session layer is responsible for maintaining sessions or connections between applications, and sockets are a key component for handling these connections. A. Data representation: This is associated with the presentation layer of the OSI model, which is responsible for translating data formats between the application layer and the network. B. Packets: This term is associated with the network layer of the OSI model, which is responsible for routing packets across the network. D. Frames: This term is associated with the data link layer of the OSI model, which is responsible for packaging data into frames for transmission over the physical network.

   Source: Adapted from community discussion — a87d6a4

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8. Question 828 · 871 in bank

   A workstation is configured with the following network details:

   

   Software on the workstation needs to send a query to the local subnet broadcast address. To which of the following addresses should the software be configured to send the query?

   • A10.1.2.0
   • B10.1.2.1
   • C10.1.2.23
   • D10.1.2.255
   • E10.1.2.31

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   Answer: E

   Explanation

   CIDR 27 is 1111 1111.1111 1111.1111 1111.1110 0000 2^5 = 32 hosts per subnet 1st address is network address, last address is broadcast address The user address is 10.1.2.23 which means he reside in the network of 10.1.2.0 to 10.1.2.31 10.1.2.31 is the last address in that network thus the broadcast address

   Source: Adapted from community discussion — Lu5ck

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9. Question 829 · 871 in bank

   Clients have reported slowness between a branch and a hub location. The senior engineer suspects asymmetrical routing is causing the issue. Which of the following should the engineer run on both the source and the destination network devices to validate this theory?

   • Atraceroute
   • Bping
   • Croute
   • Dnslookup

   Show answer

   Answer: A

   Explanation

   A. traceroute. Traceroute is a diagnostic tool that tracks the path packets take from the source to the destination. By running traceroute on both the source and the destination devices, the engineer can compare the paths taken by the packets in each direction. If the paths differ significantly, this would indicate asymmetrical routing. B. Ping: This command tests connectivity between two devices by sending ICMP echo requests and measuring the round-trip time. However, it does not reveal the path taken by packets, so it is not useful for diagnosing asymmetrical routing. C. Route: This command displays the routing table on a device, showing the paths that packets should take to reach different networks. While it can show potential routes, it does not directly show the actual path that packets are taking, especially in a network with dynamic routing. D. nslookup: This command is used to query DNS servers to find the IP address associated with a domain name or vice versa. It is unrelated to routing and would not help diagnose asymmetrical routing issues. Thus, traceroute is the appropriate tool to use in this situation.

   Source: Adapted from community discussion — dadba8c

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10. Question 830 · 871 in bank

    A company commissioned a site survey to check wireless network coverage. The technician noticed undesirable levels of RSSI in different areas of the office. Which of the following levels did the technician most likely notice?

    • A-82dBm
    • B-61dBm
    • C42dBm
    • D63dBm

    Show answer

    Answer: A

    Explanation

    I passed today. I studied 1-852 until I felt good about it. Most of the questions I had were towards the end of this dump. Only two of the pbq questions I had were on here. I wouldn't haven't of passed without studying this whole thing though. Thanks to everyone and ExamTopics for the help. Good luck to all. STUDY THOSE PBQS AND YOU CAN FIND THEM!

    Source: Adapted from community discussion — Zach123654

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N10-008 practice, question 821. 871 questions available.