Agilent Technologies N2620A - Manual (Page 270)

252 N2620A User’s Guide
10 Glossary
Glossary
ARP Address Resolution Protocol - A broadcast protocol used
to discover the low level (MAC) address that corresponds to the
higher level (IP, IPX, and so forth) address.
Auto Discovery Proactively requesting information about the
network. Also called Active Discovery.
Auto Negotiation The process of querying a switch or hub port
to connect at the highest possible rate. The options include 10
or 100 Mb Ethernet at half or full duplex.
Back-to-back Fixed length frames presented at a rate such
that there is the minimum legal separation for a given medium
between frames over a short to medium period of time.
Bridge A device used to expand a local area network by
forwarding frames between data link layers associated with two
separate cables. See also router.
Broadcast A transmission addressed to all stations on a
network.
Collision The error that occurs when two stations attempt to
transmit at the same time on an Ethernet network.
CRC Error Cyclic Redundancy Check - An error detection
scheme using a number derived from the data that is
transmitted in the packet. The number is calculated by the
sending station and stored in the packet. The receiving station,
upon receipt of the packet recalculates the number and
compares it to the stored value. If they are not the same, then
the packet has changed erroneously during the transmission.
Community A string or password for retrieving SNMP data
from a station or device.
Default Gateway The preferred system for providing access
outside the local subnet. A gateway is a form of Router. In order
for a station to access the stations on other subnets or the
Internet, it must know the address of the system that controls
access, this system is the Default Gateway.
Default Router The router to which a packet will be sent if no
specific entry in its route table directs it elsewhere.