Linksys MGBLH1 - Gigabit LH Mini-GBIC SFP Transceiver User Manual page 136

Best Effort - Indicates that traffic is assigned to the lowest priority queue, and packet delivery is
not guaranteed.
Bit - A binary digit.
Boot - To start a device and cause it to start executing instructions.
Browser - An application program that provides a way to look at and interact with all the
information on the World Wide web.
Bridge - A device that connect two networks. Bridges are hardware specific; however they are
protocol independent. Bridges operate at Layer 1 and Layer 2 levels.
Broadcast Domain - Devices sets that receive broadcast frames originating from any device
within a designated set. Routers bind broadcast domains, because routers do not forward
broadcast frames.
Broadcast Storm - An excessive amount of broadcast messages simultaneously transmitted
across a network by a single port. Forwarded message responses are heaped onto the network,
overloading network resources or causing the network to time out.
Burst - A packet transmission at faster than normal rates. Bursts are limited in time and only
occur under specific conditions.
Byte - A unit of data that is usually eight bits long
Cable Modem - A device that connects a computer to the cable television network, which in
turn connects to the Internet.
CBS (Committed Burst Size) - The maximum number of data bits transmitted within a specific
time interval.
CIR (Committed Information Rate) - The data rate is averaged over a minimum time increment.
Class Maps - An aspect of Quality of Service system that is comprised of an IP ACL and/or a
MAC ACL. Class maps are configured to match packet criteria, and are matched to packets in a
first-fit fashion.
Combo Ports - A single logical port with two physical connections, including an RJ-45
connection and a SFP connection.
Communities - A group of users that have the same system access rights.
CoS (Class of Service) - The 802.1p priority scheme. CoS provides a method for tagging packets
with priority information. A CoS value between 0-7 is added to the Layer II header of packets,
where zero is the lowest priority and seven is the highest.
DDNS (Dynamic Domain Name System) - Allows the hosting of a website, FTP server, or e-mail
server with a fixed domain name (e.g., www.xyz.com) and a dynamic IP address.
Default Gateway - A device that forwards Internet traffic from your local area network.
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