CompTIA 220-1201 Practice Test - Questions Answers, Page 2

Comprehensive and Detailed Explanation From Exact Extract:

Since the issue only occurs during scanning and copying (not printing or faxing), the problem is isolated to the document feeder. A vertical line is typically caused by debris or damage on theglass under the ADF (Automatic Document Feeder), not on components related to printing.

Reference: 'CompTIA A+ Complete Study Guide' by Quentin Docter -- Chapter 4, page 261.

Comprehensive and Detailed Explanation From Exact Extract:

A PoE (Power over Ethernet) switch transmits both data and electrical power over Ethernet cables to devices like wireless access points or VoIP phones. This is especially useful in areas where separate power sources are not available.

Reference: 'CompTIA A+ Complete Study Guide' by Quentin Docter -- Chapter 5, pages 319--321.

Comprehensive and Detailed Explanation From Exact Extract:

NFC (Near-Field Communication) is a subset of RFID technology designed for very short-range wireless communication, typically within a few centimeters. It is primarily used for contactless transactions, like mobile payments, and can also support peer-to-peer data exchanges. NFC operates at 13.56 MHz and enables devices to communicate when placed near each other.

Reference: 'CompTIA A+ Complete Study Guide' by Quentin Docter -- Chapter 7, 'Wireless and SOHO Networks', page 400.

Comprehensive and Detailed Explanation From Exact Extract:

Bluetooth is a wireless technology designed for short-range communication between devices. It is a classic example of a Personal Area Network (PAN), which supports communication between devices like smartphones, headsets, keyboards, and mice within a few meters. PANs are smaller in scope compared to LANs or WANs.

Reference: 'CompTIA A+ Complete Study Guide' by Quentin Docter -- Chapter 5, 'Networking Fundamentals', page 275.

Comprehensive and Detailed Explanation From Exact Extract:

SAS (Serial Attached SCSI) is a high-performance drive interface commonly found in enterprise environments and servers due to its reliability and speed. While SATA is more common in consumer systems, SAS is specifically designed for mission-critical applications, offering features like full-duplex operation and compatibility with SATA drives.

Reference: 'CompTIA A+ Certification All-in-One Exam Guide' by Mike Meyers -- Chapter 8, 'Mass Storage Technologies', page 288.

Comprehensive and Detailed Explanation From Exact Extract:

A punchdown tool is specifically used to insert wires into a punchdown block in patch panels, which is typical for Cat 6 and similar cabling. It ensures a secure and correct connection by pushing the wire into a metal groove that slices the insulation.

Reference: 'CompTIA A+ Certification All-in-One Exam Guide' by Mike Meyers -- Chapter 18, page 758.

Comprehensive and Detailed Explanation From Exact Extract:

A DHCP reservation binds a specific MAC address to an IP address so the device always receives the same IP from the DHCP server. This ensures network devices like printers maintain consistent connectivity and availability even when the IP pool is low.

Reference: 'CompTIA A+ Complete Study Guide' by Quentin Docter -- Chapter 18, page 1252.

Comprehensive and Detailed Explanation From Exact Extract:

A PoE injector is used to add power to an Ethernet cable, enabling the cable to deliver both power and data. This is crucial when connecting to PoE-enabled devices like IP cameras or wireless access points that are far from power outlets.

Reference: 'CompTIA A+ Complete Practice Tests' by Jeff T. Parker -- Chapter 10, Question 77, page 585.

Comprehensive and Detailed Explanation From Exact Extract:

If only one key is not functioning and debris has been checked, replacing the individual keycap is the most cost-effective next step. It's a simple, low-cost option before considering more extensive repairs like replacing the entire keyboard.

Reference: 'CompTIA A+ Complete Practice Tests' by Jeff T. Parker -- Chapter 1, Question 10, page 8.