View Full CompTIA Tech+ FC0-U71 Exam Dumps and Practice Test Dumps

 

Question 221.

Which type of network connection is generally less susceptible to electromagnetic interference than copper cabling?

1. Fiber-optic cable
   2. Coaxial cable
   3. Twisted-pair copper
   4. Telephone wire

Correct Answer: 1. Fiber-optic cable

Explanation:

Fiber-optic cable transmits data using light rather than electrical signals, making it highly resistant to electromagnetic interference. This makes fiber useful in electrically noisy environments and for long-distance, high-bandwidth connections. Copper technologies can still provide excellent performance, but they are more susceptible to electrical interference. Fiber may require specialized transceivers, connectors, and installation techniques, and it can be more expensive than common copper cabling.

Question 222.

Which cable type is most commonly used for Ethernet connections in office LANs?

1. Fiber only
   2. Twisted-pair copper
   3. HDMI
   4. SATA

Correct Answer: 2. Twisted-pair copper

Explanation:

Twisted-pair copper cabling is commonly used for Ethernet LAN connections between computers, switches, access points, printers, and other devices. Categories such as Cat 5e, Cat 6, and higher support different performance capabilities. Fiber is also used in LANs, especially for backbone links, but twisted-pair remains common for endpoint connections. HDMI carries audio and video, while SATA connects storage devices inside computers.

Question 223.

Which connector is commonly used with twisted-pair Ethernet cabling?

1. USB-A
   2. HDMI
   3. RJ-45
   4. 3.5 mm audio

Correct Answer: 3. RJ-45

Explanation:

RJ-45-style connectors are commonly associated with twisted-pair Ethernet cabling. They are used to connect network devices such as computers, switches, routers, and access points. USB-A is used for peripherals, HDMI carries digital audio and video, and 3.5 mm connectors are commonly used for analog audio. Recognizing connector types is important when installing and troubleshooting network hardware.

Question 224.

Which network device separates different IP networks and decides where packets should be forwarded?

1. Keyboard
   2. Switch only
   3. Access point only
   4. Router**

Correct Answer: 4. Router

Explanation:

A router forwards IP packets between different networks based on destination addresses and routing information. Switches primarily forward frames within a local network based on MAC addresses. Access points provide wireless connectivity but are not inherently responsible for routing. Routers commonly connect a home or business LAN to the internet or connect multiple internal networks to one another.

Question 225.

Which networking concept divides a larger IP network into smaller logical networks?

1. Subnetting
   2. Encryption
   3. Compression
   4. Virtualization

Correct Answer: 1. Subnetting

Explanation:

Subnetting divides an IP network into smaller logical networks. It can improve address organization, reduce broadcast scope, and support security or administrative boundaries. Encryption protects confidentiality, compression reduces data size, and virtualization creates logical computing environments. Understanding basic subnetting helps explain why devices on different subnets often need a router to communicate.

Question 226.

Which IP protocol version uses addresses such as 192.168.1.10?

1. IPv6
   2. IPv4
   3. DNS
   4. ARP only

Correct Answer: 2. IPv4

Explanation:

IPv4 uses 32-bit addresses typically written in dotted-decimal notation, such as 192.168.1.10. IPv6 uses much larger 128-bit addresses represented in hexadecimal groups. DNS is a name-resolution service, while ARP helps map IPv4 addresses to MAC addresses on a local network. IPv4 remains widely used, although IPv6 adoption continues because IPv4 address space is limited.

Question 227.

Which IP protocol version uses 128-bit addresses and hexadecimal notation?

1. IPv4
   2. DHCP
   3. IPv6
   4. NAT

Correct Answer: 3. IPv6

Explanation:

IPv6 uses 128-bit addresses and is commonly written as groups of hexadecimal values separated by colons. It was designed in part to address IPv4 address exhaustion and includes a vastly larger address space. IPv4 uses 32-bit dotted-decimal addresses. DHCP and NAT are networking technologies rather than IP protocol versions. IPv6 also supports modern networking features and can coexist with IPv4 in dual-stack environments.

Question 228.

Which protocol is used on local IPv4 networks to map an IP address to a MAC address?

1. DNS
   2. DHCP
   3. HTTPS
   4. ARP**

Correct Answer: 4. ARP

Explanation:

ARP, or Address Resolution Protocol, is used on IPv4 LANs to determine the MAC address associated with a known IP address. A device can use ARP before sending an Ethernet frame to another local host or to its default gateway. DNS resolves names, DHCP provides IP configuration, and HTTPS secures web traffic. ARP operates within the local network and is essential to normal IPv4 Ethernet communication.

Question 229.

Which wireless frequency band has historically been more crowded because it is shared by many Wi-Fi and non-Wi-Fi devices?

1. 2.4 GHz
   2. 60 GHz only
   3. 900 MHz only
   4. 6 GHz only

Correct Answer: 1. 2.4 GHz

Explanation:

The 2.4 GHz band is widely used by Wi-Fi, Bluetooth, some cordless devices, and other technologies. Because it has limited channel space and many devices use it, congestion and interference can be common. The 5 GHz and 6 GHz bands generally provide more channel options, though propagation and client support differ. Choosing the appropriate band depends on coverage, capacity, compatibility, and interference conditions.

Question 230.

Which wireless characteristic generally improves when a client moves closer to an access point?

1. Network cable length
   2. Received signal strength
   3. Printer toner level
   4. Disk capacity

Correct Answer: 2. Received signal strength

Explanation:

As a wireless client moves closer to an access point, the received signal is generally stronger because RF energy experiences less path loss over shorter distances. Obstacles, interference, antenna orientation, and environmental conditions can still affect the result. Printer toner, disk capacity, and cable length are unrelated. Stronger signal often helps support more reliable communication and higher data rates, although congestion can still limit performance.

Question 231.

Which technology allows a smartphone to share its cellular internet connection with another device over Wi-Fi?

1. RAID
   2. NFC only
   3. Mobile hotspot
   4. BIOS

Correct Answer: 3. Mobile hotspot

Explanation:

A mobile hotspot allows a smartphone or dedicated device to share its cellular data connection with other devices, often using Wi-Fi. Some devices can also tether through USB or Bluetooth. RAID is a storage technology, NFC is intended for very short-range communication, and BIOS is firmware. Hotspots are useful when normal Wi-Fi is unavailable, but they may consume mobile data and battery power quickly.

Question 232.

Which technology allows a mobile device to determine its geographic position using signals from satellites?

1. Bluetooth
   2. Wi-Fi only
   3. NFC
   4. GPS**

Correct Answer: 4. GPS

Explanation:

GPS uses signals from satellites to help compatible devices determine their geographic location. Smartphones, navigation devices, vehicles, and other systems commonly use GPS. Wi-Fi and cellular data may assist location services, but GPS itself is satellite-based. Bluetooth and NFC are short-range communication technologies. Location accuracy can be affected by obstacles, indoor environments, atmospheric conditions, and device capabilities.

Question 233.

Which mobile-device feature automatically rotates the screen when the device changes orientation?

1. Accelerometer
   2. SSD
   3. NIC
   4. Printer driver

Correct Answer: 1. Accelerometer

Explanation:

An accelerometer detects changes in motion and orientation and can be used to determine whether a mobile device is being held in portrait or landscape position. Operating systems use this information for automatic screen rotation and other motion-based features. SSDs provide storage, NICs provide network connectivity, and printer drivers control printers. Mobile devices may also include gyroscopes, magnetometers, proximity sensors, and other sensors.

Question 234.

Which mobile-device security feature can help locate, lock, or erase a lost device remotely?

1. Screen brightness
   2. Remote device management or find-my-device service
   3. File compression
   4. Airplane mode only

Correct Answer: 2. Remote device management or find-my-device service

Explanation:

Remote device management and find-my-device services can help locate lost hardware and may allow the owner or administrator to lock or erase it remotely. This reduces the risk of unauthorized access to sensitive information. Screen brightness and compression do not provide this capability. Airplane mode disables wireless radios but does not help recover or remotely secure a lost device. Strong authentication and encryption should also be enabled before a device is lost.

Question 235.

Which action is most appropriate before selling or giving away a storage device that contained sensitive information?

1. Rename the files
   2. Empty only the recycle bin
   3. Securely erase or sanitize the data
   4. Change the desktop wallpaper

Correct Answer: 3. Securely erase or sanitize the data

Explanation:

Sensitive data should be securely erased or sanitized before a storage device is transferred to another person. Simply deleting files or emptying a recycle bin may leave recoverable data behind. Appropriate sanitization methods depend on the storage technology and organizational requirements. Encryption can also reduce risk when properly implemented, but secure disposal procedures remain important. Highly sensitive devices may require physical destruction according to policy.

Question 236.

Which security practice best protects data if a laptop is stolen while powered off?

1. Browser history clearing
   2. Screen saver only
   3. File compression
   4. Full-disk encryption**

Correct Answer: 4. Full-disk encryption

Explanation:

Full-disk encryption helps protect stored information if a laptop is stolen because the data remains encrypted until authorized credentials or keys are provided. A screen saver offers little protection against offline access, while file compression and browser-history clearing do not provide confidentiality. Encryption is especially important for portable devices because they are more likely to be lost or stolen. Strong authentication and secure recovery-key management should accompany disk encryption.

Question 237.

Which action best protects an account if the same password was accidentally entered on a phishing website?

1. Change the password immediately and review the account
   2. Ignore the incident
   3. Disable backups
   4. Reuse the same password elsewhere

Correct Answer: 1. Change the password immediately and review the account

Explanation:

If a password is entered on a phishing site, it should be treated as compromised. The user should change it through the legitimate service, review recent account activity, and confirm that multifactor authentication and recovery settings have not been altered. If the password was reused elsewhere, those accounts should also receive unique new passwords. Ignoring the incident gives the attacker more time to misuse the stolen credential.

Question 238.

Which action best reduces the chance that one leaked password will compromise several unrelated accounts?

1. Use shorter passwords
   2. Use a unique password for every account
   3. Share one password with coworkers
   4. Disable MFA

Correct Answer: 2. Use a unique password for every account

Explanation:

Unique passwords prevent attackers from using credentials stolen from one site to access other services through credential stuffing. A password manager can help generate and securely store long, unique passwords. Reusing passwords creates a chain of risk across accounts. Multifactor authentication should also be enabled when available because it adds another layer of protection even if a password becomes known.

Question 239.

Which software security practice reduces exposure to known vulnerabilities in operating systems and applications?

1. Disable all updates
   2. Reuse old software indefinitely
   3. Apply security patches and updates
   4. Turn off antivirus permanently

Correct Answer: 3. Apply security patches and updates

Explanation:

Security patches correct known vulnerabilities that attackers may exploit. Keeping operating systems, applications, browsers, firmware, and security tools appropriately updated reduces exposure to known attacks. Updates should come from trusted sources, and organizations may test critical patches before broad deployment. Disabling updates or retaining unsupported software increases risk because publicly known vulnerabilities remain uncorrected.

Question 240.

A user can connect to the internet by IP address but cannot reach websites by name. Which problem is the most likely cause?

1. Failed monitor
   2. Low battery
   3. Broken keyboard
   4. DNS resolution problem**

Correct Answer: 4. DNS resolution problem

Explanation:

If direct IP connectivity works but names do not resolve, DNS is the most likely problem. DNS converts human-readable names into IP addresses. The technician should verify configured DNS servers, test DNS queries, and confirm that the network can reach the DNS service. Display, battery, and keyboard problems do not explain this symptom. Testing by IP and then by name is a useful way to distinguish general network connectivity problems from name-resolution failures.