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CCIE Vocab

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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. An optional transitive BGP path attribute that - for a summary route - lists the BGP RID and ASN of the router that created the summary.

2. A message sent by a router - after receiving a Leave message from a host - to determine whether there are still any active members of the group. The router uses the group address as the destination address.

3. Message sent by a PIM-DM router to its upstream router asking to quickly restart forwarding the group traffic; sent using the unicast address of the upstream router.

4. An 802.1d STP port state in which the port has been administratively disabled.

5. A predefined VC. A PVC can be equated to a leased line in concept.

6. An OSPF external route for which internal OSPF cost is not added to the cost of the route as it was redistributed into OSPF.

7. A CBWFQ and LLQ term referring to the bandwidth on an interface that is neither reserved nor allocated via a priority command.

8. The structure inside telcos' original digital circuit build-out in the mid-1900s - based upon using TDM to combine and disperse smaller DS levels into larger levels - and vice versa.

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

10. An MPLS term referring to any device that can forward packets that have MPLS labels.

11. The process of running the SPF algorithm against the LSDB - with the result being the determination of the current best route(s) to each subnet.

12. A Cisco IOS interface software queue queuing strategy implemented automatically when using either form of Frame Relay fragmentation. The system then interleaves packets from the high-priority queue between fragments of the medium-priority queue.

13. Static length subnet masking.

14. A wireless LAN physical layer that operates at up to 54-Mbps data rates using OFDM in the 5-GHz band.

15. PIM-SM is a method of routing multicast packets that requires some intelligence in the network about the locations of receivers so that multicast traffic is not flooded into areas with no receivers. PIM Sparse Mode gets its name from the assumption t

16. 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.

17. Link-State Update.

18. A T1 alarm state that occurs when the receiver can no longer consistently identify the frame.

19. The two computers use a protocol with which to communicate with the same layer on another computer. The protocol defined by each layer uses a header that is transmitted between the computers to communicate what each computer wants to do.

20. 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.

21. A Cisco IOS configuration tool that can be used to match routing updates based on a base network address - a prefix - and a range of possible masks used inside the values defined by the base network address and prefix.

22. An IPv6/IPv4 tunneling method that is designed for transporting IPv6 packets within a site where a native IPv6 infrastructures is not available.

23. Enables a wireless client to securely roam between access points in the same subnet or between subnets with access point handoff times within 50 ms.

24. A BGP path attribute that lists the next-hop IP address used to reach an NLRI.

25. Mark probability denominator.

26. An Internet standard (RFC 1305) that defines the messages and modes used for IP hosts to synchronize their time-of-day clocks.

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

28. Backup designated router.

29. Per-Hop Behavior.

30. Temporal Key Integrity Protocol.

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

32. The router in a VRRP group that is currently actively forwarding IP packets. Conceptually the same as an HSRP Active router.

33. External BGP.

34. 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.

35. A BGP path attribute that is communicated throughout a single AS to signify which route of multiple possible routes is the best route to be taken when leaving that AS. A larger value is considered to be better.

36. Data Carrier Detect.

37. 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.

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

39. A type of OSPF packet - used to communicate LSAs to another router.

40. A standards-based way of helping routers find Rendezvous Points (RP). RPs notify BSRs of the groups they handle. BSRs in turn flood the group-to-RP mappings throughout the network. Each router individually determines which RP to use for a particular

41. From a Layer 1 perspective - the process of using special strings of electrical signals over a transmission medium to inform the receiver as to which bits are overhead bits - and which fit into individual subchannels.

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

43. VTP process that prevents the flow of broadcasts and unknown unicast Ethernet frames in a VLAN from being sent to switches that have no ports in that VLAN.

44. 16 bits between the interface ID and global routing prefix in an IPv6 global address - used for subnet assignment inside an enterprise.

45. A term referring to the MQC service-policy command - which is used to enable a policy map on an interface.

46. Tag Distribution Protocol.

47. A term referring generically to ways in which a router or switch can determine whether a particular device or user should be allowed access.

48. Jargon used to refer to the second of two buckets in the dual token bucket model; its size is Be.

49. The condition in which a route has been in an EIGRP active state for longer than the router's Active timer.

50. Forwarding Equivalence Class.