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Check for link light activity. If there’s no link light activity, then the problem boils down to the cable, the NIC, or the port on the router.

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Although rebooting is often the answer when something doesn’t work correctly, in this case it’s not the first thing to try.

The router has to be powered up for the wireless connections to work.

Turning on airplane mode kills the radio signals and would stop wireless connections. It doesn’t have anything to do with the wired connection.

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Schema: Relation databases use a schema, or blueprint, to define how data will be stored.

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Index: Databases use indexes to speed up sorting and searching on one of more fields.

Primary key: This is a unique row identifier within a table such as CustomerID.

Foreign key: This is a unique identifier between multiple relational tables such as CustomerID in the Customer table linking to CustomerID in the Purchases table.

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PSU. The output capacity of a power supply unit determines the maximum total electrical use by all the computing components combined. The video card, specifically the graphics processing unit (GPU) on that card, typically is one of the most demanding components.

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CPU. The central processing unit handles all the general processing chores, not the electricity.

GPU. The graphics processing unit handles the processing on the video card, not the electricity.

SSD. A solid-state drive enables fast storage and retrieval of programs and data.

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Printer, Mouse. Peripherals are add-on devices that enhance the functionality of a PC.

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CPU, Motherboard. These are required inside a PC and are not considered add-on devices.

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As part of installation, use a proper license key. Legal commercial software requires proper licensing.

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After installation, run automatic updates. Microsoft pushes automatic updates to keep the OS patched against security issues.

As part of installation, use a service level agreement (SLA). An SLA is a contract between a client and a company that specifies services rendered for specific payment.

After installation, run the anti-malware software. Run anti-malware software to protect a computer against viruses and other malware. This has nothing to do with licensing.

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The file is set to read-only. It’s easy to lock a PDF file so changes cannot be made to the file.

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The file is corrupt. If corrupt, it most likely wouldn’t open.

The file is set to execute. It’s a document, not an executable file.

The application has expired. If the license had expired, he wouldn’t have been able to open the document.

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IP address, subnet mask. Amy needs to give the printer a valid IP address and subnet mask to make the printer available on the network. A subnet mask is a value used in the TCP/IP settings to divide the IP address of a host into its component parts: network ID and host ID.

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SSID of the network. The question stipulates a wired network; an SSID would be needed for a wireless network.

Username and password of the printer. Typically, the printer networking interface doesn’t require login credentials.

FTP port number. Despite the P in FTP, the protocol doesn’t have anything to do with printers.

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Copy the film files to cloud-based storage and send invitations to all recipients. As long as you’re connected to the Internet, you can access files from anywhere and almost any device.

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Copy the film files onto thumb drives and mail them to each recipient. This could work but is not the best answer here.

Have the tech department set up an FTP server and create accounts for all recipients. This could work but is not the most efficient solution.

E-mail each film file to each recipient. Use e-mail for smaller messages and files.

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Verify the backup. Verify the backup to make certain you have backed up properly.

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Delete the source materials. Eventually delete earlier backups but not the source files.

Run the backup two more times. There’s no reason to run it more than once.

Update the backup log. This is a red herring.

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Social engineering. Using users to gain access to sensitive information is a classic social engineering attack.

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Malware. Malware is more mindless; it’s software that attacks a system in some way.

Physical security. A physical security threat is more out and out theft of hardware rather than dancing around passwords.

Spam. Spam is unsolicited e-mail.