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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. A process whereby a switch - when making a forwarding decision - uses not only Layer 2 logic but other OSI layer equivalents as well.

2. A switch feature that examines incoming frames - comparing the source IP and MAC addresses to the DHCP snooping binding database - filtering frames whose addresses are not listed in the database for the incoming interface.

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

4. 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.

5. Also known as triggered updates.

6. Defined in RFC 2289 - a mechanism by which a shared key and a secret key together feed into a hash algorithm - creating a password that is transmitted over a network. Because the shared key is not reused - the hash value is only valid for that indivi

7. In the context of SNMP - the Trap command is sent by an SNMP agent - to a manager - when the agent wants to send unsolicited information to the manager. Trap is not followed by a Response message from the receiving SNMP manager.

8. Provider router.

9. When a wireless station connects to an access point - the access point assigns an association ID (AID) to the station. Various protocols - such as power-save mode - make use of the association ID.

10. An MPLS LSR that can forward and receive both labeled and unlabeled packets.

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

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

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

14. 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.

15. Inside telcos' original TDM hierarchy - a unit that combines multiple DS0s into a single channel

16. The innermost MPLS header in an packet traversing an MPLS VPN - with the label value identifying the forwarding details for the egress PE's VRF associated with that VPN.

17. Jargon referring to a policer action through which - instead of discarding an out-of-contract packet - the policer marks a different IPP or DSCP value - allowing the packet to continue on its way - but making the packet more likely to be discarded la

18. Quantum value.

19. An IOS feature in which multiple routing tables and routing forwarding instances exist in a single router - with interfaces being assigned to one of the several VRFs. This feature allows separating of routing domains inside a single router platform.

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

21. Virtual Routing and Forwarding table.

22. Router Advertisement.

23. The single port on each nonroot switch upon which the best Hello BPDU is received.

24. The process - defined by FRF.5 and FRF.8 - for combining ATM and FR technologies for an individual VC.

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

26. In the context of SNMP - the Set command is sent by an SNMP manager - to an agent - requesting that the agent set a single identified variable to the stated value. The main purpose is to allow remote configuration and remote operation - such as shutt

27. A Cisco-proprietary feature by which multiple routers can provide interface IP address redundancy - as well as cause a set of clients to load-balance their traffic across multiple routers inside the GLBP group.

28. Expedited Forwarding.

29. Prefix list.

30. Point-to-Point Protocol.

31. A PPP feature used to load balance multiple parallel links at Layer 2 by fragmenting frames - sending one frame over each of the links in the bundle - and reassembling them at the receiving end of the link.

32. A method that creates three thresholds per egress queue in the Cisco 3560 switch. Traffic is divided into the three queues based on CoS value - and given different likelihoods (weight) for tail drop when congestion occurs based on which egress queue

33. Class Selector.

34. A network/subnet over which two or more OSPF routers have become neighbors - thereby being able to forward packets from one router to another across that network.

35. A tunneling protocol that can be used to encapsulate many different protocol types - including IPv4 - IPv6 - IPsec - and others - to transport them across a network.

36. A category used by a policer to classify packets relative to the traffic contract. With two-color policers - these packets are considered to be above the contract; for three-color - these packets are above the Bc setting - but within the Be setting.

37. A bit in the LAPF Frame Relay header that - when set to 1 - implies that the frame has experienced congestion.

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

39. 64 bits at the end of an IPv6 global address - used to uniquely identify each host in a subnet.

40. 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.

41. An MPLS term referring to the MPLS label just before the IP header. Also called the VPN label when implementing MPLS VPNs.

42. Defined in RFC 1631 - a method of translating IP addresses in headers with the goal of allowing multiple hosts to share single public IP addresses - thereby reducing IPv4 public address depletion.

43. Policing in which two rates are metered - and packets are placed into one of three categories (conform - exceed - or violate).

44. A Cisco IOS queuing tool most notable for its reservation of a minimum bandwidth for each queue.

45. A method of providing dynamically configured spoke-to-spoke VPN connectivity in a hub-and-spoke network that significantly reduces configuration required on the spoke routers compared to traditional IPsec VPN environments.

46. 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.

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

48. For some encoding schemes - consecutive signals must use opposite polarity in an effort to reduce DC current. A BPV occurs when consecutive signals are of the same polarity.

49. Type of Service byte.

50. Time to Live.