CompTIA N10-008 Online Practice Questions and Exam Preparation

CompTIA N10-008 Online Questions & Answers

• Question 171:

  A network client is trying to connect to the wrong TCP port. Which of the following responses would the client MOST likely receive?

  A. RST
  B. FIN
  C. ICMP Time Exceeded
  D. Redirect
  A. RST

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  Explanation/Reference:

  TCP (Transmission Control Protocol) is a connection-oriented protocol, which means that a connection needs to be established between the client and the server before data can be exchanged. During the connection establishment process, the client sends a SYN (Synchronize) packet to the server, and the server responds with a SYN-ACK (Synchronize-Acknowledge) packet. If the client is trying to connect to the wrong TCP port, the server will not respond with a SYN-ACK packet, and instead, it will send a RST packet to terminate the connection attempt.

• Question 172:

  Which of the following is a document that states what the minimum performance expectations are within a network?

  A. Memorandum of understanding
  B. Service-level agreement
  C. Non-disclosure agreement
  D. Baseline metrics
  B. Service-level agreement

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  Explanation/Reference:

  A service-level agreement (SLA) is a document that states what the minimum performance expectations are within a network, such as uptime, throughput, latency, and security. An SLA is usually signed between a service provider and a customer, and it specifies the penalties or remedies if the service level is not met

• Question 173:

  Due to space constraints in an IDF, a network administrator can only a do a single switch to accommodate three data networks. The administrator needs a configuration that will allow each device to access its expected network without additional connections. The configuration must also allow each device to access the rest of the network. Which of the following should the administrator do to meet these requirements? (Select TWO).

  A. Untag the three VLANs across the uplink
  B. Tag an individual VLAN across the uplink
  C. Untag an individual VLAN per device port
  D. Tag an individual VLAN per device port
  E. Tag the three VLANs across the uplink.
  F. Tag the three VLANs per device port.
  A. Untag the three VLANs across the uplink
  C. Untag an individual VLAN per device port

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  Explanation/Reference:

  To achieve this, you should do two things:

  Tag the three VLANs across the uplink port that connects to another switch or router. This will allow data packets from different VLANs to cross over into other networks. Untag an individual VLAN per device port that connects to an end

  device. This will assign each device to its expected network without additional connections.

• Question 174:

  Given the following output:

  

  Which of the following attacks is this MOST likely an example of?

  A. ARP poisoning
  B. VLAN hopping
  C. Rogue access point
  D. Amplified DoS
  A. ARP poisoning

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  Explanation/Reference:

  The output is most likely an example of an ARP poisoning attack. ARP poisoning, also known as ARP spoofing, is a type of attack that exploits the ARP protocol to associate a malicious device's MAC address with a legitimate IP address on a local area network. This allows the attacker to intercept, modify, or redirect network traffic between two devices without their knowledge. The output shows that there are multiple entries for the same IP address (192.168.1.1) with different MAC addresses in the ARP cache of the device. This indicates that an attacker has sent fake ARP replies to trick the device into believing that its MAC address is associated with the IP address of another device (such as the default gateway). References: https://www.cisco.com/c/en/us/about/security-center/arp- spoofing.html

• Question 175:

  A help desk technician discovers the following note while reviewing tickets in a customer's account:

  Was able to confirm customer's problem with the system. Will upgrade system to latest version and monitor for further connectivity problems per developer's instructions.

  Which of the following describes what the technician was documenting with this note?

  A. The technician was approaching multiple problems individually.
  B. The technician was establishing a plan of action and identifying potential effects.
  C. The technician was testing a theory to determine the cause.
  D. The technician was identifying the problem by gathering information.
  B. The technician was establishing a plan of action and identifying potential effects.

• Question 176:

  A network technician recently installed a new Layer 2 switch. After scanning the device, the network administrator mentions there is traffic on port 23. Which of the following should the network technician have done during the installation?

  A. Disabled Telnet and enabled SSH
  B. Created an ACL to block port 23
  C. Disabled DHCP snooping
  D. Changed the native VLAN
  B. Created an ACL to block port 23

• Question 177:

  At which of the following OSI model layers does the Layer 2 Tunneling Protocol operate?

  A. Application
  B. Session
  C. Transport
  D. Data link
  D. Data link

• Question 178:

  A user is unable to perform a reverse DNS lookup of an IP address to a hostname. Which of the following DNS record types is missing?

  A. PTR
  B. CNAME
  C. SOA
  D. AAAA
  A. PTR

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  Explanation/Reference:

  When a user is unable to perform a reverse DNS lookup of an IP address to a hostname, the missing DNS record type is the PTR (Pointer) record. Here's what you need to know: PTR (Pointer) Record:

• Question 179:

  A network technician needs to install patch cords from the UTP patch panel to the access switch for a newly occupied set of offices. The patch panel is not labeled for easy jack identification. Which of the following tools provides the easiest way to identify the appropriate patch panel port?

  A. Toner
  B. Laptop
  C. Cable tester
  D. Visual fault locator
  A. Toner

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  Explanation/Reference:

  A toner is a tool that generates an audible signal that can be traced by a probe. A network technician can use a toner to identify the appropriate patch panel port by connecting the toner to one end of the patch cord and using the probe to scan the patch panel until the signal is detected. A toner is the easiest way to identify the patch panel port when the patch panel is not labeled, as it does not require a laptop, a cable tester, or a visual fault locator. A toner can also be used to locate breaks or shorts in a cable, or to verify continuity.

• Question 180:

  A business is using the local cable company to provide Internet access. Which of the following types of cabling will the cable company MOST likely use from the demarcation point back to the central office?

  A. Multimode
  B. Cat 5e
  C. RG-6
  D. Cat 6
  E. 100BASE-T
  C. RG-6

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  Explanation/Reference:

  RG-6 is a type of coaxial cable that is commonly used by cable companies to provide Internet access from the demarcation point back to the central office. It has a thicker conductor and better shielding than RG-59, which is another type of coaxial cable. Multimode and Cat 5e are types of fiber optic and twisted pair cables respectively, which are not typically used by cable companies. Cat 6 and 100BASE-T are standards for twisted pair cables, not types of cabling.