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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. A problem that occurs when an AS does not run BGP on all routers - with synchronization disabled. The routers running BGP may believe they have working routes to reach a prefix - and forward packets to internal routers that do not run BGP and do not






2. A logical concept that represents the path over which frames travel between DTEs. VCs are particularly useful when comparing Frame Relay to leased physical circuits.






3. A type of spread spectrum that spreads RF signals over the frequency spectrum by transmitting the signal at different frequencies according to a hopping pattern. One of the original 802.11 physical layers used FHSS to offer data rates of 1 and 2 Mbps






4. With OSPF - the OSPF router that wins an election amongst all current neighbors. The DR is responsible for flooding on the subnet - and for creating and flooding the type 2 LSA for the subnet.






5. A switch feature with which the switch watches ARP messages - determines if those messages may or may not be part of some attack - and filters those that look suspicious.






6. Permanent virtual circuit.






7. Wi-Fi Protected Access. A security standard that includes both TKIP and AES and was ratified by the Wi-Fi Alliance.






8. A 3-bit field in the first 3 bits of the ToS byte in the IP header - used for QoS marking.






9. A WRED process by which WRED discards all newly arriving packets intended for a queue - based on whether the queue's maximum threshold has been exceeded.






10. Message Digest 5.






11. A 1-byte field in the IP header - originally defined by RFC 791 for QoS marking purposes.






12. The speed at which the access link is clocked. This choice affects the price of the connection and many aspects of traffic shaping and policing - compression - quality of service - and other configuration options.






13. A single instance of STP that is applied to multiple VLANs - typically when using the 802.1Q trunking standard.






14. A multicast routing protocol whose default action is to flood multicast packets throughout a network.






15. The list of entries learned by the switch DHCP snooping feature. The entries include the MAC address used as the device's DHCP client address - the assigned IP address - the VLAN - and the switch port on which the DHCP assignment messages flowed.






16. Used by a policer to classify packets relative to the traffic contract. These packets are considered to be above the traffic contract in all cases.






17. Access Control Entry. An individual line in an ACL.






18. A Cisco IOS queuing tool most notable for its automatic classification of packets into separate per-flow queues.






19. As defined in RFC 3623 - graceful restart allows for uninterrupted forwarding in the event that an OSPF router's OSPF routing process must restart. The router does this by first notifying the neighbor routers that the restart is about to occur; the n






20. A wireless LAN that offers connections to the Internet from public places - such as airports - hotels - and coffee shops.






21. Extended Superframe.






22. A type of AS_PATH segment consisting of an unordered list of ASNs consolidated from component subnets of a summary BGP route.






23. On a serial cable - the pin lead set by the DTE to imply that the DTE is ready to signal using pin leads.






24. 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.






25. Virtual circuit.






26. The characterization of how far EIGRP Query messages flow away from the router that first notices a failed route and goes active for a particular subnet.






27. Maximum transmission unit.






28. In MPLS - a term used to define a label that an LSR allocates and then advertises to neighboring routers. The label is considered "local" on the router that allocates and advertises the label.






29. Controls access to the Internet in public wireless LANs.






30. Link-State Update.






31. Inside telcos' original TDM hierarchy - a unit that combines multiple DS1s into a single channel






32. Link-State Acknowledgment.






33. The rate at which a policer limits the bits exiting or entering the policer.






34. On a single computer - one layer provides a service to a higher layer. The software or hardware that implements the higher layer requests that the next lower layer perform the needed function.






35. An OSPF router that connects to the backbone area and to one or more non-backbone area.






36. The process of taking the IP - UDP - and RTP headers of a voice or video packet - compressing them - and then uncompressing them on the receiving router.






37. A strategy for subnetting a classful network for which masks/prefixes are different for some subnets of that one classful network.






38. An FRTS configuration construct - configured with the map-class frame-relay global configuration command.






39. A single address in each subnet for which packets sent to this address will be broadcast to all hosts in the subnet. It is the highest numeric value in the range of IP addresses implied by a subnet number and prefix/mask.






40. An OSPF external route for which internal OSPF cost is added to the cost of the route as it was redistributed into OSPF.






41. A BGP path attribute that implies how the route was originally injected into some router's BGP table.






42. An 802.1w RSTP port state in which the port is not the Root Port but is available to become the root port if the current root port goes down.






43. A term relating to Cisco LAN switch tail-drop logic - in which multiple tail-drop thresholds may be assigned based on CoS or DSCP - resulting in some frames being discarded more aggressively than others.






44. PIM-DM is a method of routing multicast packets that depends on a flood-and-prune approach. PIM Dense Mode gets its name from the assumption that there are many receivers of a particular multicast group - close together (from a network perspective).






45. 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.






46. Cisco-proprietary STP feature in which switches use messaging to confirm the loss of Hello BPDUs in a switch's Root Port - to avoid having to wait for maxage to expire - resulting in faster convergence.






47. In MPLS - a term used to define a label that an LSR learned from a neighboring LSR.






48. Aka network layer reachability information.






49. AS number. A number between 1 and 64 -511 (public) and 64 -512 and 65 -535 (private) assigned to an AS for the purpose of identifying a specific BGP domain.






50. Data Terminal Ready.