Which of the following steps of the troubleshooting methodology comes after testing the theory to determine cause?
Answer(s): C
The CompTIA troubleshooting methodology follows a structured approach. After testing the theory to determine the cause, the next step is to "Establish a plan of action" to resolve the issue and implement the solution. This step ensures that the fix is planned properly and minimizes any potential impact on the system.CompTIA Troubleshooting Methodology:1. Identify the problem (gather information, ask questions, and observe symptoms).2. Establish a theory of probable cause (analyze the issue and make an educated guess).3. Test the theory to determine the cause (confirm if the theory is correct).4. Establish a plan of action and implement the solution (Correct Answer).5. Verify full system functionality and implement preventive measures.6. Document findings, actions, and outcomes for future reference.
A network administrator installed a new VLAN to the network after a company added an additional floor to the office. Users are unable to obtain an IP address on the new VLAN, but ports on existing VLANs are working properly.Which of the following configurations should the administrator update?
Answer(s): D
If users on the new VLAN are unable to obtain an IP address, it is likely that their DHCP requests are not reaching the DHCP server. This typically happens when the DHCP server is on a different VLAN and there is no IP Helper address configured on the Layer 3 device (router or Layer 3 switch).An IP Helper address (also known as a DHCP relay agent) is configured on the router to forward DHCP requests from clients on different VLANs to the central DHCP server, allowing them to receive an IP address.
A network engineer needs to add a boundary network to isolate and separate the internal network from the public-facing internet.Which of the following security defense solutions would best accomplish this task?
A screened subnet (also known as a demilitarized zone (DMZ)) is a security architecture that isolates and separates the internal network from the public-facing internet by placing public-facing services (such as web servers, email servers, and VPN gateways) in an intermediate security zone. This prevents direct access to the internal network, reducing the risk of attacks.A screened subnet typically involves firewalls on both sides, with:One firewall facing the public internetAnother firewall protecting the internal network
Which of the following can help prevent unauthorized modifications to hardware when designing an MDF closet?
Answer(s): A
Lockable cabinets are an effective physical security measure to prevent unauthorized access or modifications to hardware in an MDF (Main Distribution Frame) closet. By securing the equipment inside a locked cabinet, only authorized personnel can make changes to the hardware, which helps safeguard against tampering or unauthorized modifications.
After installing a new 6E wireless router in a small office, a technician notices that some wireless devices are not able to achieve the rated speeds.Which of the following should the technician check to troubleshoot the issue? (Choose two.)
Answer(s): A,E
Client device compatibility: If some wireless devices are unable to achieve the rated speeds, the issue could be due to the client devices not supporting the higher speeds of the 6E router (such as the 6 GHz band). The technician should check whether the devices are compatible with Wi-Fi 6E and support the speeds offered by the router.Interference levels: Wireless signals can be affected by interference from other devices, networks, or physical obstructions. The technician should assess whether interference is impacting the performance of the wireless network, particularly on the 6 GHz band, which may be more susceptible to interference in some environments.
Which of the following routing protocols needs to have an autonomous system set in order to establish communication with neighbor devices?
Answer(s): B
EIGRP (Enhanced Interior Gateway Routing Protocol) requires an autonomous system (AS) number to be configured in order to establish communication with neighboring routers. The AS number helps to identify and group routers that are using the same routing protocol within a specific domain, enabling them to share routing information effectively.
An investment bank is seeking a DR backup solution.Which of the following provides the most cost-effective backup site?
A cold backup site is the most cost-effective disaster recovery (DR) solution because it involves a location that has the necessary infrastructure (like power and cooling) but no active hardware or systems in place until needed. It typically requires the least investment because it doesn't require maintaining servers and other systems running at all times, unlike hot or warm sites.When a disaster occurs, hardware and systems are then set up and restored as needed.
A firewall administrator is mapping a server's internal IP address to an external IP address for public use.Which of the following is the name of this function?
NAT (Network Address Translation) is the function that maps a server's internal IP address to an external IP address for public use. This allows internal devices to communicate with external networks (such as the internet) using a single or a few external IP addresses, while hiding the internal network structure.
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