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CCIE Vocab

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  • Match each statement with the correct term.
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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. With EIGRP - a purposefully slowly changing measurement of round-trip time between neighbors - from which the EIGRP RTO is calculated.

2. A T1 alarm state that occurs when a device has detected a local LOF/LOS/AIS condition. The device in Red alarm state then sends a Yellow alarm signal.

3. Mark probability denominator.

4. 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

5. Defined in IEEE 802.1AD - defines a messaging protocol used to negotiate the dynamic creation of PortChannels (EtherChannels) and to choose which ports can be placed into an EtherChannel.

6. A message that each host sends - either in response to a router Query message or on its own - to all multicast groups for which it would like to receive multicast traffic.

7. A routing protocol feature by which the routing update includes only routes that have changed - rather than include the entire set of routes.

8. Data-link connection identifier.

9. A T1 alarm state that occurs when a device receives a Yellow Alarm signal. This typically means that the device on the other end of the line is in a Red Alarm state.

10. The process of forwarding packets through a router. Also call IP routing.

11. Cisco Group Management Protocol.

12. With EIGRP - a route that is not a successor route - but that meets the feasibility condition; can be used when the successor route fails - without causing loops.

13. A vendor consortium that formerly worked to further Frame Relay common vendor standards.

14. One-time password.

15. Link Control Protocol.

16. Ethernet process by which devices attached to the same cable negotiate their speed and the duplex settings over the cable.

17. The difference between the measured signal power and the noise power that a particular receiver sees at a given time. Higher SNRs generally indicate better performance.

18. Protocol Independent Multicast sparse-mode routing protocol.

19. Point-to-Point Protocol.

20. Penultimate hop popping.

21. An address type in IPv6 networks that is used only on the local link and never beyond that scope.

22. The rate at which a shaper limits the bits exiting the shaper.

23. With OSPF - the encapsulation of OSPF messages inside IP - to a router with which no common subnet is shared - for the purpose of either mending partitioned areas or providing a connection from some remote area to the backbone area.

24. Inside telcos' original TDM hierarchy - the smallest unit of transmission at 64 kbps.

25. Maximum Segment Size.

26. The operating mode of shaped round-robin that provides behavior like CBWFQ with bandwidth allocated between different traffic classes by a relative amount rather than absolute percentage of the available bandwidth.

27. Exterior Gateway Protocol.

28. This term has two BGP-related definitions. First - it is the normal process in which a router - before sending an Update to an eBGP peer - adds its local ASN to the beginning of the AS_PATH path attribute. Second - it is the routing policy of purpose

29. Excess Burst.

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

31. The MD5-encoded password defined by the enable secret command.

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

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

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

35. A BGP path attribute that allows routers in one AS to set a value and advertise it into a neighboring AS - impacting the decision process in that neighboring AS. A smaller value is considered better. Also called the BGP metric.

36. A set of four hex digits listed in an IPv6 address. Each quartet is separated by a colon.

37. WRED is a method of congestion avoidance that works by dropping packets before the output queue becomes completely full. WRED can base its dropping behavior on IP Precedence or DSCP values to drop low-priority packets before high-priority packets.

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

39. A route that is created to represent one or more smaller component routes - typically in an effort to reduce the size of routing and topology tables.

40. 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.

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

42. The range through that IANA has assigned for use in private multicast domains.

43. An alternative software loaded into a Cisco router - used for basic IP connectivity; most useful when Flash memory is broken and you need IP connectivity to copy a new IOS image into Flash memory.

44. A characterization of a BGP path attribute in which all BGP implementations must support and understand the attribute (well known) - and all BGP Updates must include the attribute (mandatory).

45. With RIP - the advertisement of a poisoned route out an interface - when that route was formerly not advertised out that interface due to split horizon rules.

46. 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.

47. In IPv6 - a Router Advertisement message used by an IPv6 router to send information about itself to nodes and other routers connected to that router.

48. A switch feature that limits the number of allowed MAC addresses on a port - with optional limits based on the actual values of the MAC addresses.

49. A route that is used for forwarding packets when the packet does not match any more specific routes in the IP routing table.

50. With private VLANs - a secondary VLAN in which the ports can send and receive frames only with promiscuous ports in the primary VLAN.