Tablets typically connect to wireless networks using Wi-Fi, which adheres to the IEEE 802.11 standard (often seen as 802.11a/b/g/n/ac/ax). The correct protocol family for this type of connection is 802.11X (referring to Wi-Fi technologies broadly).
"Wireless devices such as tablets use the 802.11 standards to connect to Wi-Fi access points for network connectivity." - CompTIA ITF+ Other options:
B . Thunderbolt and D. USB-C - Wired connection standards
C . Bluetooth - Short-range peripheral communication, not Wi-Fi
Correct answer: A