Agilent Technologies N2620A user manual Glossary

7Glossary

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, etc.) 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 Mbit Ethernet at half or full duplex.

Back-to-backFixed 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.

174 Agilent FrameScope Pro User’s Manual