Motorola SURFboard SBG901 - Manual (Page 83)

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B • Glossary 82
TERM DEFINITION
stateful-inspection A type of firewall that tracks each connection, traversing all firewall
interfaces to ensure validity. In addition to examining the source and
destination in the packet header based on static rules, a stateful
inspection firewall:
• Examines packet headers via the context established by previous
packets that traversed the firewall
• Monitors the connection state and saves it in a table
• Closes ports until a connection to a specific port is requested
• May examine the packet contents up through the application layer
to determine more than just the source and destination
A stateful inspection firewall is more advanced than a static filter
firewall.
subscriber A home or office user who accesses television, data, or other
services from an Internet Service provider.
synchronous The SBG901 uses synchronous timing for upstream data
transmissions. The CMTS broadcasts timing messages that
bandwidth is available. The SBG901 reserves data bytes requiring x
number of mini-slots. The CMTS replies that it can receive data at a
specified time (synchronized). At the specified time, the SBG901
transmits the x-number of data bytes.
upstream In a cable data network, upstream describes the direction of data
sent from the subscriber’s computer through the cable modem to
the CMTS and the Internet.
Wireless Cable Modem
Gateway The Motorola SURFboard Wireless Cable Modem Gateway is a
single device that combines a cable modem, router, Ethernet switch,
wireless access point, and DHCP server for SOHO or SME use.
WPA Wi-Fi Protected Access (WPA) encryption, as described on the Wi-Fi
Alliance web page: http://www.wifialliance.org. It is a far more robust
form of encryption than WEP. Motorola recommends using WPA if
all of your client hardware supports WPA.