Overview
Installation
Troubleshooting
Contact
FAQ
Specifications Glossary
License
Configuration:
Basic Gateway TCP/IP Wireless USB
SBG940 User Guide
129
S
server
In a client/server architecture, a dedicated computer that supplies files or services such as file transfer,
remote login, or printing to clients.
scope
The set of IP addresses that a DHCP server can lease to clients.
service provider
A company providing cable data services to subscribers.
SID
A service ID is a unique 14-bit identifier the CMTS assigns to a cable modem or gateway that
identifies the traffic type it carries (for example, data or voice). The SID provides the basis for the
CMTS to allocate bandwidth to the cable modem and implement CoS.
SDU
service data unit
SME
small and medium enterprise
SMTP
Simple Mail Transfer Protocol is a standard Internet protocol for transferring e-mail.
SNMP
Simple Network Management Protocol is a standard to monitor and manage networks and network
devices. Data is exchanged using PDU messages.
SOHO
small office home office
spectrum
A specified range of frequencies used for transmission of electromagnetic signals.
spectrum
allocation
An allocation of portions of the available electromagnetic spectrum for specific services, such as AM,
FM, or personal communications.
splitter
A device that divides the signal from an input cable between two or more cables.
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 on 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.
static filter
A type of firewall that examines the source and destination in the packet header based on
administrator-defined rules
only
.
static IP
address
An IP address that is permanently assigned to a host. Normally, a static IP address must be assigned
manually. The opposite of dynamic IP address.
static route
A manually-defined route.
station
IEEE 802.11b term for wireless client.
subscriber
A home or office user who accesses television, data, or other services from a cable provider.
subnet mask
A bit mask that is logically ANDed with the destination IP address of a packet to determine the network
address. A router routes packets using the network address.
subnetwork
A part of a network; commonly abbreviated “subnet.” When subnetting is used, the host portion of the
IP address is divided into a subnet and host number. Hosts and routers use the subnet mask to
identify the bits used for the network and subnet number.
