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CCIE Vocab

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Defined in IEEE 802.1w - a specification to enhance the 802.1d standard to improve the speed of STP convergence.






2. A packet-scheduling algorithm used in Cisco switches that provides similar behavior to CBWFQ in shared mode and polices in shaped mode.






3. A type of OSPF packet used to exchange and acknowledge LSA headers. Sometimes called DBD.






4. High Density Binary 3.






5. Link-State Update.






6. A bit in the ATM cell header that - when set to 1 - means that if a device needs to discard frames - it should discard the frames with DE 1 first.






7. In MPLS - the mapping of an IP prefix and a label - which is then advertised to neighbors using LDP.






8. Protocol data unit.






9. A name used for DS1 lines inside the European TDM hierarchy.






10. In the PIM-SM design - the process by which a source DR - after it starts to receive the group traffic - encapsulates the multicast packets in the unicast packets and sends them to the RP.






11. Tag Distribution Protocol.






12. Challenge Handshake Authentication Protocol.






13. Class Selector.






14. A type of OSPF NSSA area for which neither external (type 5) LSAs are introduced - nor type 3 summary LSAs; instead - the ABRs originate and inject default routes into the area. External routes can be injected into a totally NSSA area.






15. A set of parameters for CBAC to perform in its traffic inspection process.






16. A local Cisco-proprietary BGP setting that is not advertised to any peers. A larger value is considered to be better.






17. A standard (RFC 951) protocol by which a LAN-attached host can dynamically broadcast a request for a server to assign it an IP address - along with other configuration settings - including a subnet mask and default gateway IP address.






18. Loss of Frame.






19. A BGP ASN whose value is between 64 -512 and 65 -535. These values are not assigned for use on the Internet - and can be used for private purposes - typically either within confederations or by ISPs to hide the ASN used by some customers.






20. A state for a route in an EIGRP topology table that indicates that the router is actively sending Query messages for this route - attempting to validate and learn the current best route to that subnet.






21. A prestandard (at the time of publication) wireless LAN physical layer that offers data rates in the hundreds of megabits per second.






22. In shaping and policing - commonly used to refer to the shaping or policing rate. For WAN services - a common reference to the bit rate defined in the WAN service business contract for each VC.






23. Virtual LAN.






24. A term used in this book to refer to a route that is included in a larger summary route.






25. An 802.1d STP port state in which the port sends and receives frames.






26. Mark probability denominator.






27. An EIGRP message that is used by neighbors to reply to a query. Reply messages require an Ack.






28. Part of the Cisco IOS Firewall feature set - CBAC inspects traffic using information in the higher-layer protocols being carried to decide whether to open the firewall to specific inbound traffic. CBAC supports both UDP and TCP and multiple higher-la






29. Advanced Encryption Standard A superior encryption mechanism that is part of the 802.11i standard and has much stronger security than TKIP.






30. Link-State Acknowledgment.






31. A serial-line encoding standard like B8ZS - but with each set of four consecutive 0s being changed to include a Bipolar Violation to maintain synchronization.






32. A term used with WFQ for the number assigned to a packet as it is enqueued into a WFQ. WFQ schedules the currently lowest SN packet next.






33. Any routing protocol that uses the concept of using the SPF algorithm with an LSDB to compute routes.






34. Autonomous System Boundary Router. An OSPF router that redistributes routes from some other source into OSPF.






35. A term referring generically to a server that performs many AAA functions. It also refers to the software product Cisco Secure Access Control Server.






36. A message sent by a host when it wants to leave a group - addressed to the All Multicast Routers address 224.0.0.2.






37. A bit inside the Frame Relay header that - when set - implies that congestion occurred in the direction opposite (or backward) as compared with the direction of the frame.






38. A BGP router in an AS that uses route reflectors - but that is not aided by any RR server.






39. Link Access Procedure for Frame-Mode Bearer Services.






40. With routing protocols - the measurement of favorability that determines which entry will be installed in a routing table if more than one router is advertising that exact network and mask.






41. A set of DiffServ PHBs that defines 12 DSCP values - with four queuing classes and three drop probabilities within each queuing class.






42. With a routing update - or routing table entry - the portion of a route that defines the next router to which a packet should be sent to reach the destination subnet. With routing protocols - the Next Hop field may define a router other than the rout






43. A mechanism in which VLAN information can extend over another set of 802.1Q trunks by tunneling the original 802.1Q traffic with another 802.1Q tag. It allows a service provider to support transparent VLAN services with multiple customers - even if t






44. A Cisco IOS configuration tool for routing protocols by which routing updates may be filtered.






45. A wireless LAN that includes the use of access points. Infrastructure mode connects wireless users to a wired network and allows wireless users to roam throughout a facility between different access points. All 802.11 data frames in an infrastructure






46. The router that will receive the group traffic when a multicast router forwards group traffic to another router.






47. A characteristic of OSPF interfaces that determines whether a DR election is attempted - whether or not neighbors must be statically configured - and the default Hello and Dead timer settings.






48. Forwarding Information Base.






49. A term referring to the processes and bits in the data stream used to manage the Telco TDM hierarchy.






50. An enhanced version of WEP that is part of the 802.11i standard and has an automatic key-update mechanism that makes it much more secure than WEP. TKIP is not as strong as AES in terms of data protection.