Which of the following is a requirement to connect a smartphone to a wireless network?

The SSID (Service Set Identifier) is the name of a wireless network that clients, including smartphones, use to identify and connect to a specific Wi-Fi access point or router. Without knowing the SSID, a smartphone cannot establish a connection to that particular wireless network.

SATA (Serial Advanced Technology Attachment) is an interface for connecting storage devices and is irrelevant to wireless network connectivity.

SMTP (Simple Mail Transfer Protocol) is used for sending email messages and is a high-level application protocol, not a requirement for physical network connection.

Gzip is a file compression utility and has no role in connecting a smartphone to a wireless network.