CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 701:

  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?

  

  A. Duplicate IP address

  B. High collisions

  C. Asynchronous route

  D. Switch loop

  Correct Answer: D

  A massive amount of broadcast packages points to a switching loop.

• Question 702:

  A network administrator responds to a support ticket that was submitted by a customer who is having issues connecting to a website inside of the company network The administrator verities that the customer could not connect to a website

  using a URL.

  Which of the following troubleshooting steps would be BEST for the administrator to take?

  A. Check for certificate issues

  B. Contact the ISP

  C. Attempt to connect to the site via IP address

  D. Check the NTP configuration.

  Correct Answer: C

  The best option for the administrator to take would be to attempt to connect to the site via IP address. This will help to determine if the issue is related to the website's DNS address or if the site itself is not accessible. Checking for certificate issues may be necessary, but this should be done after the administrator has attempted to connect to the site via IP address. Contacting the ISP is unnecessary since the issue is related to the website inside of the company network, and checking the NTP configuration is not relevant to this issue.

  When a customer is having issues connecting to a website using a URL, one of the first troubleshooting steps a network administrator should take is attempting to connect to the site using the IP address of the website. This will help to determine if the issue is related to a DNS resolution problem or a connectivity problem. If the administrator is able to connect to the website using the IP address, then the issue may be related to a DNS problem. However, if the administrator is still unable to connect, then the issue may be related to a connectivity problem. In either case, further troubleshooting steps will be necessary. Checking for certificate issues or NTP configuration, and contacting the ISP would not be the BEST initial steps in this scenario.

• Question 703:

  AGRE tunnel has been configured between two remote sites. Which of the following features, when configured, ensures me GRE overhead does not affect payload?

  A. jumbo frames

  B. Auto medium-dependent Interface

  C. Interface crossover

  D. Collision detection

  Correct Answer: A

  One of the features that can be configured to ensure that GRE overhead does not affect payload is A. jumbo frames. Jumbo frames are Ethernet frames that have a payload size larger than 1500 bytes, which is the standard maximum transmission unit (MTU) for Ethernet. By using jumbo frames, more data can be sent in each packet, reducing the overhead ratio and improving efficiency. Auto medium-dependent interface (MDI), interface crossover, and collision detection are features related to Ethernet physical layer connectivity, but they do not affect GRE overhead or payload.

• Question 704:

  Which of the following is an advanced distance vector routing protocol that automates routing tables and also uses some features of link-state routing protocols?

  A. OSPF

  B. RIP

  C. EIGRP

  D. BGP

  Correct Answer: C

  EIGRP is an advanced distance vector routing protocol that is able to automatically update routing tables and also uses features of link-state routing protocols, such as the ability to send updates about the current topology of the network. EIGRP also has the ability to use a variety of algorithms to determine the best route for a packet to take, allowing for more efficient routing across the network.

• Question 705:

  Which of the following topologies is designed to fully support applications hosted in on- premises data centers, public or private clouds, and SaaS services?

  A. SDWAN

  B. MAN

  C. PAN

  D. MPLS

  Correct Answer: A

  SDWAN (Software Defined Wide Area Network) is a network architecture that enables the deployment of hybrid networks that can fully support applications hosted in on-premises data centers, public or private clouds, and SaaS services. SDWAN uses software-defined networking (SDN) concepts to simplify network management and reduce costs.

• Question 706:

  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?

  A. Change the device's default password.

  B. Disable router advertisement guard.

  C. Activate control plane policing.

  D. Disable unneeded network services.

  Correct Answer: A

• Question 707:

  Which of the following is an example of on-demand scalable hardware that is typically housed in the vendor's data center?

  A. DaaS

  B. IaaS

  C. PaaS

  D. SaaS

  Correct Answer: B

• Question 708:

  Which of the following would enable a network technician to implement dynamic routing?

  A. An IPS

  B. A bridge

  C. A Layer 3 switch

  D. A hub

  Correct Answer: C

• Question 709:

  A technician is checking network devices to look for opportunities to improve security. Which of the following toots would BEST accomplish this task?

  A. Wi-Fi analyzer

  B. Protocol analyzer

  C. Nmap

  D. IP scanner

  Correct Answer: C

  Nmap is a tool that can be used to scan and identify network devices and can help identify potential security vulnerabilities. Wi-Fi analyzer is used to analyze wireless networks, protocol analyzers are used to analyze network traffic, and IP scanners are used to discover devices on a network.

• Question 710:

  A new office space is being designed. The network switches are up. but no services are running yet A network engineer plugs in a laptop configured as a DHCP client to a switch. Which ol the following IP addresses should be assigned to the laptop?

  A. 10.1.1.1

  B. 169.254.1.128

  C. 172 16 128 128

  D. 192 168.0.1

  Correct Answer: B

  When a DHCP client is connected to a network and no DHCP server is available, the client can automatically configure a link-local address in the 169.254.0.0/16 range using the Automatic Private IP Addressing (APIPA) feature. So, the correct answer is option B, 169.254.1.128. This is also known as an APIPA address. Reference: CompTIA Network+ Study Guide, Exam N10-007, Fourth Edition, by Todd Lammle (Chapter 4: IP Addressing)