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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. Discard Eligible.






2. In IPv6 - the Neighbor Discovery message used by an IPv6 node to request information about a neighbor or neighbors.






3. An ITU standard Frame Relay header - including the DLCI - DE - FECN - and BECN bits in the LAPF header - and a frame check in the LAPF trailer.






4. A Frame Relay address used in Frame Relay headers to identify the VC






5. An optional transitive BGP path attribute used to store 32-bit decimal values. Used for flexible grouping of routes by assigning the group the same COMMUNITY value. Other routers can apply routing policies based on the COMMUNITY value. Used in a larg






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






7. The SNMP specifications - standardized in RFCs - defining the rules by which SNMP MIB variables should be defined.






8. A characterization of a BGP path attribute in which BGP implementations are not required to support the attribute (optional) - and for which if a router receives a route with such an attribute - the router should remove the attribute before advertisi






9. An STP timer that dictates how long a switch should wait when it ceases to hear Hellos.






10. Border Gateway Protocol.






11. Address Resolution Protocol. Defined in RFC 826 - a protocol used on LANs so that an IP host can discover the MAC address of another device that is using a particular IP address.






12. Cisco Group Management Protocol.






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






14. A message sent by a multicast router - by default every 125 seconds - on each of its LAN interfaces to determine whether any host wants to receive multicast traffic for any group.






15. A conceptual model used by shapers and policers to represent their internal logic.






16. With RIP - the regular interval at which updates are sent. Each interface uses an independent timer - defaulting to 30 seconds.






17. 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






18. An EIGRP router's reaction to an input event - leading to the use of a feasible successor or going active on a route.






19. In wireless LANs - a mechanism that counters issues related to RF interference by dividing a larger 802.11 data frame into smaller frames that are sent independently to the destination. See also LFI.






20. WRED compares this setting to the average queue depth to decide whether packets should be discarded. No packets are discarded if the average queue depth falls below this minimum threshold.






21. A method for how a TCP sender grows its calculated CWND variable - thereby growing the allowed window for the connection. Congestion Avoidance grows CWND linearly.






22. A Cisco-proprietary STP implementation - created many years before IEEE 802.1s and 802.1w - that speeds convergence and allows for one STP instance for each VLAN.






23. An NTP mode in which two or more NTP servers mutually synchronize their clocks.






24. A router that should not be used to forward packets between other routers. Other routers will not send Query messages to a stub router.






25. Link Fragmentation and Interleaving.






26. Superframe






27. In MPLS VPNs - a 64-bit Extended Community path attribute attached to a BGP route for the purpose of controlling into which VRFs the route is added.






28. On a serial cable - the pin lead set by the DCE to tell the DTE that the DTE is allowed send data.






29. An alternative software loaded into a Cisco router - used for low-level debugging and for password recovery.






30. The destination VLAN for an RSPAN session.






31. With EIGRP - the metric (distance) of a route as reported by a neighboring router.






32. The operating mode of shaped round-robin that provides a low-latency queue with policing.






33. Defined in RFC 3748 - the protocol used by IEEE 802.1X for exchanging authentication information.






34. The notation in a Cisco IOS IP routing table that identifies the route used by that router as the default route.






35. Defined in IEEE 802.1w - a specification to enhance the 802.1d standard to improve the speed of STP convergence.






36. Backward Explicit Congestion Notification.






37. An E-LSR in an MPLS VPN network whose role in a particular discussion is to receive labeled packets from other LSRs and then forward the packets as unlabeled packets to CE routers.






38. A term used with Cisco LAN switches - referring to a DSCP value used when making QoS decisions about a frame. This value may not be the actual DSCP value in the IP header encapsulated inside the frame.






39. A queuing tool's logic by which it selects the next packet to dequeue from its many queues.






40. An effort to reduce the query scope with EIGRP - using route summarization or EIGRP stub routers.






41. A numeric value between 0 and 32 (inclusive) that defines the number of beginning bits in an IP address for which all IP addresses in the same group have the same value. Alternative: The number of binary 1s beginning a subnet mask - written as a deci






42. A state variable kept by a router for each known neighbor or potential neighbor.






43. The initial 802.11 common key encryption mechanism; vulnerable to hackers.






44. On a multiaccess network - when a PIM-DM or PIM-SM router receives a Prune message - it starts a 3-second timer. If it receives a Join message on the multiaccess network from another router before the timer expires - it considers the message as an ov






45. The process of changing the electrical characteristics on a transmission medium - based on defined rules - to represent data.






46. Dynamic Multipoint VPN.






47. The Cisco IOS Router IP Traffic Export feature - intended for intrusion detection - exports IP traffic that has signs of an attack - such as duplicate IP packets simultaneously received on two or more of a router's interfaces.






48. Jargon used by STP mostly when discussing the root election process; refers to a Hello with a lower bridge ID. Sometimes refers to a Hello with the same bridge ID as another - but with better values for the tiebreakers in the election process.






49. Router-Port Group Management Protocol.






50. Provides dynamic inspection of traffic as it traverses the router. It uses Context-Based Access Control (CBAC) to look deeper into a packet than an access list can. It tracks outbound traffic and dynamically allows in responses to that traffic.