Sony PCWA-A500 Operating Instructions Manual page 30

WAN (Wide Area Network)
A network that interconnects remote
LANs through the Internet or telephone
lines.
WEP
IEEE802.11-compliant security system.
Using the WEP key as the password, only
client computers and Access Points that
have the same ID and password may log
on to the same wireless LAN for file
sharing.
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