220-1201 Practice Test 34 — 15 Questions

Question 1

A small business has several PCs that intermittently reboot or fail to start. The building's electrical system is old, and the technician suspects power quality issues. Which device should the technician recommend installing to protect the computers?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

An uninterruptible power supply (UPS).. An uninterruptible power supply (UPS) provides battery backup and voltage regulation, protecting against surges, sags, and brownouts that can cause reboots or failures. A surge protector only guards against spikes, not low-voltage conditions. A UPS is the appropriate solution for unstable power.

Answer

A power strip with a surge protector.

Answer

A line conditioner (voltage regulator).

Answer

A dedicated circuit from the breaker panel.

Question 2

A technician is setting up a new wireless network for a small office. The office has three access points (APs) that should allow seamless roaming. The technician configures all APs with the same SSID and security settings. What additional configuration is necessary to prevent clients from staying connected to a weak signal?

Accepted Answer

Adjust the minimum RSSI value on each AP. Adjusting the minimum RSSI (Received Signal Strength Indicator) value on each AP forces clients to roam away from an AP when the signal drops below a configured threshold. This prevents sticky clients from holding onto a weak signal, which is essential for seamless roaming in a multi-AP environment with the same SSID.

Answer

Set each AP to a different channel to avoid interference

Answer

Enable WPA3 encryption on all APs

Answer

Configure the APs with different SSIDs for each AP

Question 3

A small business is moving to a new office and wants to connect all their computers, printers, and a server. They have a limited budget and need a simple, wired network that does not require internet access initially. Which network type should they implement?

Accepted Answer

Local Area Network (LAN). A Local Area Network (LAN) is the correct choice because it connects devices within a single physical location, such as an office, using wired Ethernet (IEEE 802.3) and switches. It requires no internet access and is cost-effective for a small business with a limited budget, as it only needs basic hardware like a switch and Cat5e/Cat6 cabling.

Answer

Wide Area Network (WAN)

Answer

Personal Area Network (PAN)

Answer

Metropolitan Area Network (MAN)

Question 4

A user reports that their smartphone's mobile hotspot stops working after a few minutes of use. The laptop connected to it loses internet access. What is the most likely cause?

Accepted Answer

The smartphone's hotspot timeout setting is enabled.. The most likely cause is that the smartphone's hotspot timeout setting is enabled. Many smartphones have a built-in power-saving feature that automatically disables the mobile hotspot after a period of inactivity (e.g., 5 or 10 minutes) to conserve battery and data. When this timeout triggers, the hotspot stops broadcasting, causing the connected laptop to lose internet access.

Answer

The laptop's Wi-Fi adapter is faulty.

Answer

The smartphone's cellular signal is too weak.

Answer

The laptop has a static IP address configured.

Question 5

A small business has a single router with four built-in switch ports. They need to connect 12 wired devices. They have a 24-port unmanaged switch. Which configuration will provide the best network performance and connectivity?

Accepted Answer

Connect the switch to one of the router's LAN ports, then connect all 12 devices to the switch.. Connecting the 24-port unmanaged switch to one of the router's LAN ports extends the network, allowing all 12 devices to connect via the switch. The router handles routing and DHCP, while the switch provides ample ports and wire-speed forwarding at Layer 2, ensuring optimal performance without collisions or bandwidth contention.

Answer

Connect all 12 devices directly to the router's four ports using splitters.

Answer

Connect half the devices to the router and half to the switch, then connect the switch to the router.

Answer

Use the router as a switch by disabling its routing functions.

Question 6

A customer reports that they cannot send emails from their desktop email client, but they can receive emails. The email server is running on the local network. Which port is most likely blocked on the firewall?

Accepted Answer

25. Port 25 is the default SMTP port used for sending email. If the firewall blocks outbound or inbound traffic on port 25, the desktop email client cannot establish an SMTP connection to the local email server, preventing email transmission while still allowing reception via other protocols.

Answer

110

Answer

143

Answer

993

Question 7

A user reports that their monitor displays a distorted image with wavy lines. The monitor uses a VGA connection. The technician checks the cable and finds it is not fully tightened. After securing the thumbscrews, the image is still distorted. What is the most likely cause?

Accepted Answer

The VGA cable has a broken pin. VGA is an analog signal and can suffer from interference. Damaged or loose pins in the VGA connector can cause distortion even if the cable appears secure. The pins may be bent or broken.

Answer

The monitor's refresh rate is set too high

Answer

The graphics driver needs to be updated

Answer

The monitor's power cable is loose

Question 8

A user reports that their wired connection is intermittent. They are using a Cat5e cable connected to a 1000BASE-T switch. The link light on the switch port is blinking rapidly. What is the most likely cause of the intermittent connection?

Accepted Answer

The cable is damaged or has a loose connector. A rapidly blinking link light typically indicates active data transmission, but when paired with an intermittent connection, it often points to physical-layer issues. A damaged Cat5e cable or loose connector can cause frequent link flaps and CRC errors, leading to the rapid blinking as the switch repeatedly attempts to re-establish the link. This is the most likely cause because the symptom (blinking link light) aligns with physical-layer problems rather than configuration or load issues.

Answer

The switch port is set to half-duplex

Answer

The network card is configured for 10 Mbps

Answer

The switch is overloaded with traffic

Question 9

A technician is troubleshooting a DHCP issue where clients are not receiving IP addresses. Which port must be open on the firewall for DHCP server communication?

Accepted Answer

67. DHCP servers listen on UDP port 67 for incoming client requests (DHCPDISCOVER, DHCPREQUEST). For the server to receive these messages, the firewall must allow inbound traffic to port 67. Without this port open, the server cannot process client requests, and no IP addresses are assigned.

Answer

68

Answer

53

Answer

123

Question 10

A user complains that their wireless connection drops frequently, but only when they are in the conference room. Other areas of the office have stable connections. What is the most likely cause?

Accepted Answer

The conference room has thick walls or electronic interference that weakens the signal.. The issue is location-specific: the connection drops only in the conference room, while other areas are stable. This strongly points to a local environmental factor, such as thick walls (e.g., concrete or metal) that attenuate the 2.4 GHz or 5 GHz signal, or electronic interference from devices like projectors, fluorescent lights, or microwave ovens. A faulty adapter or overloaded AP would cause problems everywhere, not just in one room.

Answer

The user's laptop has a faulty wireless adapter.

Answer

The access point is overloaded with too many connections.

Answer

The access point's firmware is outdated.

Question 11

A technician is configuring a new web server that must support both standard HTTP and HTTPS traffic. Which two ports should be opened in the firewall?

Accepted Answer

80 and 443. Standard HTTP traffic uses TCP port 80, and HTTPS (HTTP over TLS/SSL) uses TCP port 443. A web server must have both ports open in the firewall to serve unencrypted and encrypted web content respectively, as defined in RFC 7230 and RFC 2818.

Answer

21 and 22

Answer

8080 and 8443

Answer

25 and 110

Question 12

You are troubleshooting a workstation that randomly reboots when running 3D rendering software. The CPU and GPU temperatures are normal. You have already replaced the RAM and tested the hard drive. What component is most likely the root cause?

Accepted Answer

The power supply is unable to deliver consistent power under load. Random reboots under load, especially with normal temperatures, often point to a failing power supply that cannot sustain stable voltage under high demand. The PSU may still power the system at idle but fail under peak load. Other components have been ruled out.

Answer

The CPU is overheating despite normal readings

Answer

The GPU driver is corrupted

Answer

The motherboard has a short circuit

Question 13

A company deploys tablets for inventory management. The tablets need to connect to a Bluetooth barcode scanner and also sync data to a cloud server over Wi-Fi. The Bluetooth connection drops every few minutes. What is the most likely cause?

Accepted Answer

Wi-Fi and Bluetooth are interfering because both use the 2.4 GHz band.. The most likely cause is that both Wi-Fi and Bluetooth operate in the 2.4 GHz ISM band, and when a tablet is actively using Wi-Fi to sync data to a cloud server, the radio can cause interference with the Bluetooth signal, leading to periodic disconnections. This is a well-known coexistence issue, especially in dense environments where both radios are active simultaneously.

Answer

The barcode scanner's battery is low.

Answer

The tablets are too far from the barcode scanner.

Answer

The cloud server is not responding to sync requests.

Question 14

A user reports that they can send emails but cannot receive any. The email client is configured with SMTP for outgoing and POP3 for incoming. The server is reachable. Which port is most likely blocked on the firewall for the incoming mail protocol?

Accepted Answer

Port 110. The user can send emails (SMTP works) but cannot receive them, and the incoming protocol is POP3. POP3 uses port 110 by default. Since the server is reachable, a firewall blocking port 110 would prevent the email client from retrieving incoming messages, while SMTP on port 25 remains unaffected.

Answer

Port 25

Answer

Port 443

Answer

Port 53

Question 15

A technician is setting up a new web server that must be accessible from the internet using HTTPS. The server is behind a firewall that performs port forwarding. After configuration, external users cannot reach the server, but internal users can. Which protocol and port combination must be forwarded to the server?

Accepted Answer

TCP 443. HTTPS uses TCP port 443 by default. Since the server must be accessible from the internet via HTTPS, the firewall must forward TCP port 443 to the server's internal IP address. Internal users can reach the server because they are on the same local network and bypass the firewall's port forwarding rule, but external traffic on port 443 is blocked unless the rule is correctly configured.

Answer

TCP 80

Answer

UDP 443

Answer

TCP 3389