Epson 802.11g Reference Manual page 16

In the Infrastructure mode, both wireless and wired computers
can communicate through an access point to send data to the
network interface.
HUB
Note:
Some access points or routers support only the TCP/IP protocol. If you
use this product with a protocol other than TCP/IP, make sure the
protocols are supported by the access point or router.
In the Ad Hoc mode, a network interface and computers
wirelessly communicate directly with each other, without using
an access point.
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