The Satellite C50D-B has a better Wi-Fi standard than most laptops of a similar spec and age to it. This laptop has an 802.11n WiFi standard, whereas most notebook PCs that have been around for around the same time as it have an 802.11b WiFi standard. In addition, this notebook PC has an 802.11g WiFi standard.
This portable PC's Wi-Fi standard (802.11n) is actually the best Wi-Fi standard amongst all laptops that came out around the same time as the Satellite C50D-B.
The worst Wi-Fi standard amongst comparable types of portable PC is 802.11a.