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Question 1:
A network administrator is creating a subnet for a remote office that has 53 network devices. An additional requirement is to use the most efficient subnet. Which of the following CIDR notations indicates the appropriate number of IP addresses with the LEAST amount of unused addresses? (Choose Correct option and give explanation directly from CompTIA Network+ Study guide or documents)
A. /24
B. /26
C. /28
D. /32
Correct Answer: B
This CIDR notation indicates that there are 64 IP addresses, of which 62 are usable for network devices. This provides the LEAST amount of unused addresses, making it the most efficient subnet for a remote office with 53 network devices. According to the CompTIA Network+ Study Guide, “Subnetting allows you to divide one large network into smaller, more manageable networks or subnets.”
Question 2:
A network engineer is planning to connect a legacy network switch to a core switch for redundancy. The proposed cable will run in the celling above high-voltage industrial equipment and fluorescent lights. The legacy switch has 1000BASE-T ports with no expansion slots. The engineer has decided to use multimode cable to make this connection. Which of the following will be needed to connect the two switches?
A. RG-6 connectors
B. A patch panel
C. A GBIC transceiver
D. A media converter
Correct Answer: D
Question 3:
A network administrator needs to query the NSs for a remote application. Which of the following commands would BEST help the administrator accomplish this task?
A. dig
B. arp
C. show interface
D. hostname
Correct Answer: A
dig (Domain information groper) is the command line tool to query DNS nameserver in linux
Question 4:
A website administrator is concerned the company\’s static website could be defaced by hacktivists or used as a pivot point to attack internal systems. Which of the following should a network security administrator recommend to assist with detecting these activities?
A. Implement file integrity monitoring.
B. Change the default credentials.
C. Use SSL encryption.
D. Update the web-server software.
Correct Answer: C
Question 5:
A company is reviewing ways to cut the overall cost of Its IT budget. A network technician suggests removing various computer programs from the IT budget and only providing these programs on an as- needed basis. Which of the following models would meet this requirement?
A. Multitinency
B. laaS
C. SaaS
D. VPN
Correct Answer: C
SaaS (Software as a Service). With SaaS, a company can subscribe to software applications that are hosted by a third-party provider and accessed over the internet. This model allows a company to pay only for what they use and provides flexibility to scale up or down as needed.
Question 6:
Given the following information:
Which of the following command-line tools would generate this output?
A. netstat
B. arp
C. dig
D. tracert
Correct Answer: A
Question 7:
Which of the following technologies provides a failover mechanism for the default gateway?
A. FHRP
B. LACP
C. OSPF
D. STP
Correct Answer: A
Question 8:
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)
Question 9:
Which of the following uses eight groups of characters for addressing?
A. MAC
B. IPv4
C. IPv6
D. DHCP
Correct Answer: C
Question 10:
Two network technicians are installing a fiber-optic link between routers. The technicians used a light meter to verify the correct fibers. However, when they connect the fibers to the router interface, the link does not connect. Which of the following would explain the issue? (Choose two.)
A. They used the wrong type of fiber transceiver.
B. Incorrect TX/RX polarity exists on the link
C. The connection has duplexing configuration issues.
D. Halogen light fixtures are causing interference.
E. One of the technicians installed a loopback adapter.
F. The RSSI was not strong enough on the link
Correct Answer: AB
Question 11:
An engineer recently decided to upgrade the firmware on a router. During the upgrade, the help desk received calls about a network outage, and a critical ticket was opened. The network manager would like to create a policy to prevent this from happening in the future. Which of the following documents should the manager create?
A. Change management
B. incident response
C. Standard operating procedure
D. System life cycle
Correct Answer: A
The network manager would like to prevent a similar network outage from occurring in the future, which indicates a need for preventive measures. The incident has already occurred, so an incident response plan may not be sufficient on its own to prevent future incidents. A system life cycle document outlines the various stages of a system\’s development, and while it may include a section on upgrades, it may not provide specific guidance on how to prevent network outages during upgrades.
Change management. Change management policies outline procedures for making changes to IT infrastructure, such as upgrades, to minimize disruptions and ensure that changes are implemented in a controlled and consistent manner. By creating a change management policy, the network manager can establish procedures for upgrading firmware and other changes, which can help prevent network outages and minimize their impact on users.
Question 12:
Which of the following is conducted frequently to maintain an updated list of a system\’s weaknesses?
A. Penetration test
B. Posture assessment
C. Risk assessment
D. Vulnerability scan
Correct Answer: D
A vulnerability scan is an automated process that checks a system or network for known vulnerabilities, such as outdated software versions, misconfigured settings, and unpatched systems. It checks the system against a database of known vulnerabilities and generates a report of any weaknesses that are found. This process is usually done periodically, such as weekly or monthly, to ensure that the system stays up-to-date with the latest patches and security updates.
Question 13:
Which of the following topologies requires me MOST connections when designing a network?
A. Mesh
B. Star
C. Bus
D. Ring
Correct Answer: A
Question 14:
A branch of a company recently switched to a new ISP. The network engineer was given a new IP range to assign. The ISP assigned 196.26.4.0/26, and the branch gateway router now has the following configurations on the interface that peers to the ISP: The network engineer observes that all users have lost Internet connectivity. Which of the following describes the issue?
A. The incorrect subnet mask was configured
B. The incorrect gateway was configured
C. The incorrect IP address was configured
D. The incorrect interface was configured
Correct Answer: B
Both an incorrect subnet mask and an incorrect default gateway can cause loss of Internet connectivity. However, given the information provided:
–
The subnet mask is set to 255.255.255.224, but it should be 255.255.255.192 for a /26 network. This incorrect subnet mask could cause issues with routing and connectivity within the local network.
–
The gateway IP address is set to 196.24.4.1, which is not in the same subnet as the IP address of the interface (196.26.4.30). This could prevent the router from correctly routing traffic to and from the Internet.
It\’s hard to definitively say which is the “main” cause without more information, as both could potentially lead to a loss of Internet connectivity. However, typically, an incorrect default gateway would more directly lead to a loss of Internet connectivity, as the default gateway is responsible for routing traffic between the local network and the Internet. So if forced to choose one, I would lean towards **B. The incorrect gateway was configured** as being the main cause.
Question 15:
Which of the following would MOST likely utilize PoE?
A. A camera
B. A printer
C. A hub
D. A modem
Correct Answer: A
The device that would MOST likely utilize PoE is a camera1. A camera is an example of a powered device (PD) that can receive both data and power from a single Ethernet cable connected to a power sourcing equipment (PSE), such as a switch or an injector. PoE cameras are commonly used for security and surveillance purposes, as they can reduce the cost and complexity of installation and maintenance. PoE cameras can support various features, such as motion detection, night vision, pan-tilt-zoom (PTZ), and remote control