Important CompTIA 220-1201 Exam Questions

Answer: B

Explanation:

DHCP Dynamic Host Configuration Protocol is the service that automatically assigns IP addresses and other essential network settings to devices when they join a network. Instead of manually configuring each device with an IP address, subnet mask, default gateway, and DNS servers, a DHCP server provides these settings dynamically from a defined address pool. This reduces configuration errors, prevents IP conflicts, and makes network administration easier---especially in environments with many devices or frequent changes. In the DHCP process, a client broadcasts a request, the DHCP server offers an address, the client requests that offered address, and the server acknowledges it, granting the device a lease for a specific period. The lease can be renewed, and administrators can also configure reservations to always give the same IP to a particular device based on its MAC address.

DNS is used for resolving hostnames to IP addresses, not assigning them. SMTP is for sending email between mail servers and clients. SNMP is used for monitoring and managing network devices. Therefore, DHCP is the correct service for automatically assigning IP addresses.

Answer: B

Explanation:

Comprehensive and Detailed

Laptop Wi-Fi antennas run through the display bezel and connect via small coaxial clips. After motherboard replacement, these are often not fully seated, causing weak or unstable Wi-Fi.

CompTIA Concepts:

Laptop hardware troubleshooting

Antenna connector checks after repair

WLAN performance issues caused by antenna misalignment

Answer: B

Explanation:

A valid public IP address must fall outside the private IP address ranges:

10.0.0.0 to 10.255.255.255

172.16.0.0 to 172.31.255.255

192.168.0.0 to 192.168.255.255

66.157.195.20 is outside these ranges, making it a public IP address.

Why Not A, C, D: These IPs fall within private IP address ranges.

CompTIA A+ Exam Reference: Core 1 (220-1201), Section 2.6, IP addressing.

Answer: E

Explanation:

The best answer is E. Subnet mask. With the current subnet mask of 255.255.255.0, the user's IP address 192.168.1.10 is on the 192.168.1.0/24 network, while the default gateway 192.168.2.1 is on the 192.168.2.0/24 network. A host normally needs its default gateway to be reachable on the same local network. The Mike Meyers material explains that the subnet mask identifies the network ID and host ID, and every computer on a single LAN must have the same network ID. With 255.255.255.0, the first three octets define the network, so 192.168.1.x and 192.168.2.x are different networks. The NOC verified that the gateway value itself is correct, so changing the gateway would conflict with the verified next hop. DNS settings would affect name resolution, not access to all local and remote resources. Lease time and firewall rules are not indicated by the IP information. The subnet mask must be changed so the client and gateway are in the same local IP network.

Answer: A

Explanation:

The symptoms clearly point to a hardware-level signal degradation issue, which is most commonly caused by a malfunctioning or damaged Wi-Fi antenna in the smartphone. CompTIA A+ mobile device troubleshooting emphasizes comparing the affected device's signal strength with other nearby devices. In this case, other devices in the same location have stronger Wi-Fi signals, meaning the network itself is functioning normally. The consistent low signal across multiple networks strongly suggests antenna failure.

Modern smartphones use internal antenna assemblies located along the frame or behind the back cover. If the antenna becomes loose, damaged, or obstructed, the device may show weak or unstable Wi-Fi connectivity, especially in crowded environments where strong, stable reception is required to maintain a connection.

Option B (outdated Wi-Fi standard) would limit speed but not cause significant signal weakness compared to surrounding devices. Option C (interference) affects all devices in an area similarly---not just one device. Option D (power settings) may reduce background activity or scanning frequency, but it does not cause consistently low signal strength.

Therefore, the most likely cause is a malfunctioning Wi-Fi antenna inside the smartphone.