Sony VGN-FJ100 - Manual (Page 79)

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Using Peripheral Devices
Connecting to a Network (LAN)
You can connect your computer to 100BASE-TX/10BASE-T-type networks via an Ethernet network cable. Connect one end
of an optional network cable to the Network (Ethernet) port on the computer or the (optional) port replicator and the other end
to your network. For detailed settings and devices needed to connect to the network, see your network administrator.
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The computer can be connected to the network with the default settings.
When the computer is attached to the optional port replicator, you can only use the Network (Ethernet) port on the port replicator.