Does this computer have built-in WiFi? The specs on the Newegg web-site seem to indicate that it does, but I cannot find any corroborating evidence online.

Yes, this computer has built-in WiFi. It supports IEEE 802.11n.

Questions & Answers: Refurbished: Dell OptiPlex 9020 SFF Desktop 4th Gen Intel Core i7-4770 3.4GHz 16GB RAM 512 GB SSD DVD-RW Windows 10 Professional 64-Bit

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Dell OptiPlex 9020 SFF Desktop 4th Gen Intel Core i7-4770 3.4GHz 16GB RAM 512 GB SSD DVD-RW Windows 10 Professional 64-Bit