The Chromebook 11 has an 802.11n WiFi standard which is better than most laptops of this age and type. Most Chromebooks that have been on the market for around the same time as it have an 802.11b WiFi standard. In addition, this notebook PC have 802.11a and 802.11ac and 802.11g WiFi standards.
An 802.11n WiFi standard is actually the best Wi-Fi standard across all portable PCs of a comparable spec and age to the Chromebook 11.
Across comparable types of portable PC the worst Wi-Fi standard is 802.11a.