A+ 1101 PM A 47 - 66

Which mobile device connection is commonly used for making payments at a store checkout?

• NFC

• DB-9

• Cellular

• Bluetooth

Answer explanation

The Answer: A. NFC

NFC (Near Field Communication) is designed to transfer small amounts of data wirelessly over a limited area. It's common to use a smart phone or smart watch with a credit card terminal to pay for goods or services.

The incorrect answers:

B. DB-9

A DB-9 serial link is a wired connection commonly used for configuration of switches, routers, and other infrastructure devices. A DB-9 connection would not be used during the checkout process.

C.   Cellular

Cellular networks are used for voice and data communication, but those cellular networks are not part of the in-store purchase process.

D.   Bluetooth

Although Bluetooth supports many different features, it's not used during the checkout process in a store.

More information:

220-1101, Objective 1.3 - Connecting Mobile Devices https://professormesser.link/1101010301

A company hosts a cloud-based application which includes redundant servers located in different data centers around the world. Which of the following cloud computing characteristics would BEST describe this application design?

• Rapid elasticity

• High availability

• Non-metered

• Desktop as a Service

Answer explanation

The Answer: B. High availability

If a single server fails, there are other servers available in different data centers for clients to access. This high availability ensures the services are always available to the users.

The incorrect answers:

A. Rapid elasticity

Rapid elasticity provides a way to quickly scale up and down as needed. Although this is a common cloud computing characteristic, this specific example does not describe any scalability features.

C. Non-metered

A cloud service with a flat-fee for access to a resource is defined as  non-metered. This example does not describe the billing for the service or the usage costs for any part of the service.

D. Desktop as a Service

Desktop as a Service, or DaaS, is a technology for running a user's desktop in the cloud. In this example, there's no mention of the application type or how a user's desktop would be integrated into this application.

More information:

220-1101, Objective 4.1 - Cloud Characteristics https://professormesser.link/1101040102

When printing a document on a laser printer, a user finds that all of the text on the page smears when touched. What is the MOST  likely cause of this issue?

• Fuser is damaged

• Toner cartridge is low

• Photosensitive drum has been scratched

• Incorrect printer driver is installed

• Printer cleaning process is not working

Answer explanation

The Answer: A. Fuser is damaged

The fuser permanently melts the toner to the paper using heat and pressure. If the fuser is not working, the toner will easily smear when touched.

The incorrect answers:

B. Toner cartridge is low

A low toner cartridge will cause the output to appear faded and difficult to read. A low toner cartridge will not cause the output to smear when touched.

C. Photosensitive drum has been scratched

A scratched drum will cause lines and other stray marks to appear on the printed page. The toner sticks to the scratches and is transferred to the final page output.

D.   Incorrect printer driver is installed

The printer driver will format the output into a page description language that the printer can understand. An incorrect driver would not cause the printer output to smear.

E.   Printer cleaning process is not working

If the cleaning process is not working, then a "ghost" of previous passes around the drum will appear on different parts of the printed page. It's common that poor cleaning will cause multiple faded versions of a page to appear in the printed output. A non-working cleaning process would not cause the printer output to smear, however.

More information:

220-1101, Objective 5.6 - Troubleshooting Printers https://professormesser.link/1101050601

A manager’s computer is able to connect to Internet sites while in conference rooms or in the building courtyard. When the laptop is brought back to the manager’s desk and placed into the docking station, the Internet access is unavailable but all other features are working. Which of the following should be the FIRST troubleshooting task for  this issue?

• Replace the docking station power supply

• Upgrade the laptop BIOS

• Replace the docking station

• Check the docking station network cable

Answer explanation

The Answer: D. Check the docking station network cable

The Internet access on the laptop appears to be working properly on the wireless network, but the docking station connection would use a wired Ethernet connection. If everything else is working properly, then the issue would most likely be associated with the Ethernet interface in the  docking station.

The incorrect answers:

A.  Replace the docking station power supply

If other docking station features were not working, there could be an issue with the power connection on the docking station. In this situation, all of the other features appeared to be working properly when connected to the docking station.

B.  Upgrade the laptop BIOS

A BIOS upgrade is a significant change, and it's rarely the first step in the troubleshooting process.

C. Replace the docking station

Although it's certainly possible the docking station could be faulty, there are no obvious issues with other features. Before replacing the entire docking station, it would be useful to check the individual components associated with the problem.

More information:

220-1101, Objective 1.3 - Mobile Device Accessories https://professormesser.link/1101010302

A company is developing an internal application for smartphones and tablets. Which of the following would improve the security of the application's logon process?

• Data caps

• Two-factor authentication

• Bluetooth pairing

• NFC

Answer explanation

The Answer: B. Two-factor authentication

Two-factor authentication requires multiple factors to complete the logon process. For example, a password (something you know) might be combined with a fingerprint (something you are) to properly authenticate users to the application.

The incorrect answers:

A. Data caps

A data cap is commonly used to limit the amount of data used by a particular system. Setting limits on data usage does not provide any additional security to the logon process.

C.   Bluetooth pairing

Before a Bluetooth device can be used, it must be paired with another device. Bluetooth pairing does not provide any additional security to the application authentication process.

D.   NFC

NFC (Near-Field Communication) is a protocol used to transfer data between a mobile device and another system. NFC is commonly used after the authentication process has already occurred.

More information:

220-1101, Objective 1.4 - Mobile Device Connectivity https://professormesser.link/1101010402

Which of the following would be MOST associated with an IoT device?

• Multithreading

• ARM

• Virtualization support

• ECC RAM

Answer explanation

The Answers: B. ARM

An ARM (Advanced RISC Machine) processor architecture provides efficient processing, less power, and less heat than other processor types. This efficiency makes ARM a common choice for mobile and IoT (Internet of Things) devices.

The incorrect answers:

A. Multithreading

Multithreading is a common feature across most modern processors, so this would not be a feature most associated with IoT devices.

C.   Virtualization support

Although virtualization support is common on larger computer systems, virtualization support is not commonly used with IoT devices.

D.   ECC RAM

ECC (Error Correction Code) RAM (Random Access Memory) is commonly associated with larger servers and not with low-power IoT devices.

More information:

220-1101, Objective 3.4 - CPU Features https://professormesser.link/1101030407

What is the minimum category of unshielded copper cable for  a 10 gigabit per second Ethernet link with a fifteen meter distance?

• Category 5

• Category 6

• Category 5e

• Category 6A

Answer explanation

The Answer: B. Category 6

The physical characteristics of networking cables are separated into categories. An unshielded category 6 cable can support a ten gigabit per second 10GBASE-T network to a distance of fifty-five meters.

The incorrect answers:

A. Category 5

Category 5 copper cables can support a one gigabit per second

1000BASE-T network up to one hundred meters. Ten gigabit per second speeds are not supported over category 5 cable.

C.   Category 5e

Category 5e (enhanced) is a minor update to category 5, and the Ethernet standards supported for a category 5e cable are identical to those of a category 5 cable. Therefore, category 5e copper cables can support a one gigabit per second 1000BASE-T network up to one hundred meters  in length.

D.   Category 6A

Category 6A (augmented) cables can support ten gigabit per second

10GBASE-T connections to a distance of one hundred meters. Category 6A cable would not be the minimum category of cable used for  these requirements

More information:

220-1101, Objective 3.1 - Network Cables https://professormesser.link/1101030101

An engineer has manually configured IP addresses for a small office that uses a cable modem for Internet connectivity. However, none of the devices configured with a manual IP address are able to browse Internet websites. All devices are connected to the cable modem with twisted-pair  Ethernet cables. This is the configuration of one device:

IP address: 192.168.1.7

Subnet mask: 255.255.255.0

Default gateway: 192.168.1.1

DNS: 192.168.1.7  

The engineer can successfully ping the local IP address and the default gateway address. Which of the following should be the NEXT troubleshooting step?

• Check for duplicate IP addresses

• Replace the Ethernet cable

• Check the DNS configuration

• Replace the cable modem

Answer explanation

The Answer: C. Check the DNS configuration

One of the most noticeable IP (Internet Protocol) configuration settings was the DNS (Domain Name Service) server IP address set to the same IP address the local device. Since DNS servers are commonly separate devices, it would be unusual to see a DNS configured with the same IP address of the local device. The next step should be to confirm the DNS settings with the local network administrator.

The incorrect answers:

A.  Check for duplicate IP addresses

No mention was made of an duplicate IP address warning, and the ping tests worked properly to devices on the local subnet.

B.  Replace the Ethernet cable

Since the ping tests worked locally, we can conclude that the Ethernet cable is most likely not related to this issue.

D. Replace the cable modem

The cable modem is most likely the default gateway, and a ping of that IP address worked properly. More tests would need to be performed before replacing any hardware.

More information:

220-1101, Objective 2.5 - IPv4 and IPv6 https://professormesser.link/1101020501

A user in a remote office is connecting a device using an F-connector. Which of the following would be MOST likely associated with this connection?

• Cable modem

• Switch

• Punchdown block

• DSL modem

Answer explanation

The Answer: A. Cable modem

A cable modem is commonly associated with a coaxial cable input using an F-connector. The output from the cable modem commonly uses an RJ45 Ethernet connector.

The incorrect answers:

B. Switch

A switch is usually associated with Ethernet connections, and Ethernet commonly uses RJ45 connectors and not F-connectors.

C. Punchdown block

A punchdown block is often used instead of connectors, and individual wires will be physically pressed or "punched" into the block. A punchdown block is not commonly associated with F-connectors.

D. DSL modem

A DSL (Digital Subscriber Line) modem uses POTS (Plain Old

Telephone Service) with RJ11 connectors to provide connectivity to the Internet service provider. A DSL modem does not commonly include F-connector interfaces.

More information:

220-1101, Objective 3.1 - Copper Connectors https://professormesser.link/1101030110

A user in the accounting department has turned on their computer and received the message “Date and Time not set.” Which of the following would be the MOST likely reason for this message?

• The motherboard battery has discharged

• Windows update has rebooted the computer

• Daylight Saving Time occurred during the weekend

• The BIOS was just upgraded

Answer explanation

The Answer: A. The motherboard battery has discharged

The battery on a motherboard is used to maintain the date and time configuration when the computer is not connected to a power source. If the battery has discharged, the computer will not be able to maintain the proper time and an error message will appear during startup.

The incorrect answers:

B.   Windows update has rebooted the computer

Rebooting the computer will not cause the date and time to be reset.

C.  Daylight Saving Time occurred during the weekend

Daylight Saving Time does not cause the computer's date and time to be reset, and any changes to the clock in Windows will be reflected in the BIOS.

D.  The BIOS was just upgraded

A BIOS upgrade does not commonly reset the date and time on the  system clock.

More information:

220-1101, Objective 3.4 - BIOS Settings https://professormesser.link/1101030406