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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 convention for IP addresses in which class A - B - and C default network prefixes (of 8 - 16 - and 24 bits - respectively) are ignored.

2. A set of QoS RFCs that redefines the IP header's ToS byte - and suggests specific settings of the DSCP field and the implied QoS actions based on those settings.

3. A BGP feature that overcomes the requirement of a full mesh of iBGP peers inside a single AS by separating the AS into multiple sub-autonomous systems.

4. A wireless LAN that includes the use of access points. Infrastructure mode connects wireless users to a wired network and allows wireless users to roam throughout a facility between different access points. All 802.11 data frames in an infrastructure

5. An effort to reduce the query scope with EIGRP - using route summarization or EIGRP stub routers.

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

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

8. 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.

9. A generic term that refers to the data structure used by a layer in a layered network architecture when sending data.

10. In 802.1X - the computer that stores usernames/passwords and verifies that the correct values were submitted before authenticating the user.

11. A multicast routing protocol that forwards the multicast traffic only when requested by a downstream router.

12. Feasible distance.

13. In IPv6 - an address used in the Neighbor Discovery (ND) process. The format for these addresses is FF02::1:FF00:0000/104 - and each IPv6 host must join the corresponding group for each of its unicast and anycast addresses.

14. A 16-bit number set with a router config-register command. It is used to set several low-level features related mainly to accessing the router and what the router does when powered on.

15. 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.

16. A characterization of a BGP path attribute in which BGP implementations are not required to support the attribute (optional) - and for which if a router receives a route with such an attribute - the router should forward the attribute unchanged (tran

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

18. A reserved value for the BGP COMMUNITY path attribute that implies that the route should not be advertised to any other peer.

19. The portion of PPP focused on features that are unrelated to any specific Layer 3 protocol.

20. An STP timer that dictates the interval at which the Root switch generates and sends Hello BPDUs.

21. The ASN assigned to a confederation sub-AS.

22. Cisco-proprietary STP feature in which a switch port monitors for incoming superior Hellos - and reacts to a superior Hello to prevent any switch connected to that port from becoming root.

23. External BGP.

24. A BGP feature by which a router learns iBGP routes - and then forwards them to other iBGP peers - reducing the required number of iBGP peers while also avoiding routing loops.

25. Bootstrap Router.

26. WRED compares this setting to the average queue depth to decide whether packets should be discarded. No packets are discarded if the average queue depth falls below this minimum threshold.

27. In BGP - a configuration construct in which multiple neighbors' parameters can be configured as a group - thereby reducing the length of the configuration. Additionally - BGP performs routing policy logic against only one set of Updates for the entir

28. When a Query is received from a router - each host randomly picks a time between 0 and the Maximum Response Time period to send a Report. When the host with the smallest time period first sends the Report - the rest of the hosts suppress their report

29. 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

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

31. IP multicast address range from through

32. With OSPF - the timer used to determine when a neighboring router has failed - based on a router not receiving any OSPF messages - including Hellos - in this timer period.

33. Cisco-proprietary STP feature in which a switch port monitors for STP BPDUs of any kind - err-disabling the port upon receipt of any BPDU.

34. VLAN Trunking Protocol.

35. Provides dynamic inspection of traffic as it traverses the router. It uses Context-Based Access Control (CBAC) to look deeper into a packet than an access list can. It tracks outbound traffic and dynamically allows in responses to that traffic.

36. An MPLS VPN term referring to any LSR that connects to customers to support the forwarding of unlabeled packets - as well as connecting to the MPLS network to support labeled packets - thereby making the LSR be on the edge between the provider and th

37. A router that should either permanently or temporarily not be used as a transit router. Can wait a certain time after OSPF process start - or after BGP notifies OSPF that BGP has converged - before ceasing to be a stub router.

38. 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.

39. Border Gateway Protocol.

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

41. The encapsulation of EAP messages directly inside LAN frames. This encapsulation is used between the supplicant and the authenticator.

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

43. Spanning Tree Protocol.

44. Temporal Key Integrity Protocol.

45. The most recent standardized set of generic SNMP MIB variables - defined in RFC 1213 and updated in RFCs 2011 through 2013.

46. A calculation of the length of the AS_PATH PA - which includes 1 for each number in the AS_SEQ - 1 for an entire AS_SET segment - and possibly other considerations.

47. A 3-bit field in an MPLS header used for marking frames.

48. Quantum value.

49. An MPLS term referring to the first of several labels when an MPLS-forwarded packet has multiple labels (a label stack).

50. A message sent by the multicast router - by default every 60 seconds - on each of its LAN interfaces to determine whether any host wants to receive multicast traffic for any group.