User guide

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STATEFUL. The Netopia Gateway monitors and maintains the
state of any network transaction. In terms of network request-
and-reply, state consists of the source IP address, destination
IP address, communication ports, and data sequence. The
Netopia Gateway processes the stream of a network conversa-
tion, rather than just individual packets. It verifies that packets
are sent from and received by the proper IP addresses along
the proper communication ports in the correct order and that
no imposter packets interrupt the packet flow. Packet filtering
monitors only the ports involved, while the Netopia Gateway
analyzes the continuous conversation stream, preventing ses-
sion hijacking and denial of service attacks.
static route. Route entered manually in a routing table.
subnet mask. A 32-bit address mask that identifies which bits
of an IP address represent network address information and
which bits represent node identifier information.
synchronous communication. Method of data communica-
tion requiring the transmission of timing signals to keep peers
synchronized in sending and receiving blocks of data.
-----T-----
telnet. IP protocol that lets a user on one host establish and
use a virtual terminal connection to a remote host.
twisted pair. Cable consisting of two copper strands twisted
around each other. The twisting provides protection against
electromagnetic interference.