The Latitude 14 E7240 has a better Wi-Fi standard than most similar spec laptops that came out around the same time as it. This portable PC has an 802.11n wi-Fi standards, whereas most notebook PCs of this age and type have an 802.11g wi-Fi standards. In addition, this DELL portable PC have 802.11a and 802.11ac and 802.11b wi-Fi standardss.
This laptop's Wi-Fi standard (802.11n) is in fact the best Wi-Fi standard amongst all portable PCs that came out around the same time as the Latitude 14 E7240.
The worst Wi-Fi standard across comparable types of laptop is 802.11a.