WPAWPA2-PSK (TKIP/AES) (recommended): Our Comcast Xfinity router recommends this free-for-all option. This enables both WPA and WPA2 with both TKIP and AES. This provides maximum compatibility with any ancient devices you might have, but also ensures an attacker can breach your network by cracking the lowest-common-denominator encryption scheme. This TKIP+AES option may also be called WPA2-PSK “mixed” mode.