Canon PIXMA MX870 - Manual (Page 1117)

Advanced Guide > About Network Communication > Appendix > Restrictions
Restrictions
If you use a printer over the wireless LAN, the printer may recognize nearby wireless systems, you
should set a network key (WEP, WPA, or WPA2) to the access point to encrypt wireless transmission.
Wireless communication with a product that does not comply with the Wi-Fi standard cannot be
guaranteed.
Connecting with too many computers may affect the printer performance, such as printing speed.
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