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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. Backward Explicit Congestion Notification.






2. Data Set Ready.






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






4. In OSPF - a number assigned to each LSA - ranging from 0x80000001 and wrapping back around to 0x7FFFFFFF - which is used to determine which LSA is most recent.






5. An IPv6/IPv4 tunneling method that allows isolated IPv6 domains to be connected over an IPv4 network.






6. Forwarding Equivalence Class.






7. A NAT term describing an IP address representing a host that resides outside the enterprise network - with the address being used in packets inside the enterprise network.






8. 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






9. In PIM-SM - the path of the group traffic that flows from the RP to the routers that need the traffic. It is also called the root-path tree (RPT) - because it is rooted at the RP.






10. The Lempel Ziv STAC compression algorithm is used in Frame Relay networks to define dynamic dictionary entries that list a binary string from the compressed data and an associated smaller string that represents it during transmission






11. In BGP - a feature in which BGP routes cannot be considered to be a best route to reach an NLRI unless that same prefix exists in the router's IP routing table as learned via some IGP.






12. A BGP term referring to an IP prefix and prefix length.






13. Reverse ARP.






14. A specification for the 64-bit interface ID in an IPv6 address - composed of the first half of a MAC address - hex FFFE - and the last half of the MAC.






15. Smoothed Round-Trip Time.






16. Cisco Group Management Protocol.






17. Low-latency queuing.






18. The algorithm used by OSPF and IS-IS to compute routes based on the LSDB.






19. An MQC-based feature of IOS that is used to classify and mark packets for QoS purposes.






20. A field in the IP header that is decremented at each pass through a Layer 3 forwarding device.






21. The actual number of packets in a queue at a particular time.






22. A component of the IOS IP SLA feature. An IP SLA responder is a router configured to respond to a particular IP SLA message initiated by another router - allowing the routers to work together to provide performance information including UDP jitter an






23. A 64-bit extension to the BGP NLRI field - used by MPLS for the purpose of making MPLS VPN customer routes unique in spite of the possibility of overlapping IPv4 address spaces in different customer networks.






24. Service set identifier.






25. Superframe






26. Sent by a PIM router to its upstream router to either request that the upstream router forward the group traffic or stop forwarding the group traffic that is currently being forwarded. If a PIM router wants to start receiving the group traffic - it l






27. A routing protocol feature for which the routing protocol sends routing updates immediately upon hearing about a changed route - even though it may normally only send updates on a regular update interval.






28. In MQC and CB Policing - a configuration style by which - for one category of packets (conform - exceed - or violate) - more than one marking action is defined for a single category. For example - marking DSCP and DE.






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






30. Another term for summary route.






31. An OSPF area into which external (type 5) LSAs are not introduced by its ABRs; instead - the ABRs originate and inject default routes into the area.






32. With DiffServ - a DSCP marking and a related set of QoS actions applied to packets that have that marking.






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






34. 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






35. A BGP neighbor state in which the BGP neighbors have stabilized and can exchange routing information using BGP Update messages.






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






37. Link Control Protocol.






38. Sent by a PIM router - by default every 30 seconds - on every interface on which PIM is configured to discover neighbors - establish adjacency - and maintain adjacency.






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






40. A mapping between each DSCP value and a WRED threshold - often used in Cisco LAN switches when performing WRED.






41. An 802.1d STP port state in which the port does not send or receive frames - except for listening for received Hello BPDUs.






42. 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.






43. A Cisco-proprietary messaging protocol used to negotiate the dynamic creation of PortChannels (EtherChannels) and to choose which ports can be placed into an EtherChannel.






44. A method of obtaining an IPv6 address that uses DHCPv6. See also stateless autoconfiguration.






45. 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.






46. A NAT term describing an IP address representing a host that resides inside the enterprise network - with the address being used in packets inside the enterprise network.






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






48. The combination of PVST+ and Rapid Spanning Tree. It provides subsecond convergence time and is compatible with PVST+ and MSTP.






49. From one perspective - DTE devices are one of two devices on either end of a communications circuit - specifically the device with less control over the communications. In Frame Relay - routers connected to a Frame Relay access link are DTE devices.






50. An architecture and set of documents that defines Cisco's best recommendations for how to secure a network.