B-4GlossaryencapsulationA method for moving messages across networks that use differenttypes of protocols. The message is encapsulated (rather thantranslated), so it can move across a network that otherwise couldnot understand its protocol. Encapsulating bridges and switchesgenerally use proprietary encapsulation schemes.encodeTo translate data into a series of electrical or optical pulses that cantravel efficiently over a cable or other medium.entityAn active element within an Open Systems Interconnection (OSI)network layer or sublayer.extended LANA collection of LANs interconnected by protocol-independentbridges or switches.filtering rateA measure (in packets per second) of the ELS10-26’s efficiency inexamining each frame, comparing it with an address table, andthen deciding whether to discard the frame or forward it.forwarding rateThe rate (in packets per second) at which the ELS10-26 can receivea stream of packets from one network segment, complete allprocessing, and transmit the packets to another network segment.frameA data message that includes a source address, destinationaddress, data, frame check sequence (FCS), and controlinformation.full wire speedRefers to packet forwarding at the maximum rate at which datacan be transmitted on a given LAN.
