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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. Policing in which a single rate is metered - and packets are placed into one of three categories (conform - exceed - or violate).

2. A process used in routers that are encrypting traffic to permit egress QoS actions to be taken on traffic that is being encrypted on that router. QoS pre-classification keeps a copy of each packet to be encrypted in memory long enough to take the app

3. Sending a message from a single source or multiple sources to selected multiple destinations across a Layer 3 network in one data stream.

4. 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.

5. A serial-line encoding standard that sends alternating positive and negative 3-volt signals for binary 1 - and no signal (0 V) for binary 0.

6. Cisco-proprietary VLAN trunking protocol.

7. With RIP - a per-route timer (default 180 seconds) that begins when a route's metric changes to a larger value.

8. Superframe

9. The protocol used by content engines to manage traffic flow between routers configured for WCCP and between content engines. WCCP takes advantage of the fact that many web pages (and other content) are regularly accessed by users in a given network.

10. A neighbor state that signifies the other router has reached neighbor status - having passed the parameter check. The FIB entry details the information needed for forwarding: the next-hop router and the outgoing interface - in an optimized mtrie stru

11. Cisco Wireless LAN Solution Engine.

12. A method of collecting traffic received on a switch port or a VLAN and sending it to specific destination ports on the same switch.

13. Instead of advertising all routes out a particular interface - the routing protocol omits the routes whose outgoing interface field matches the interface out which the update would be sent.

14. In an IOS confederation configuration - the actual ASN as seen by eBGP peers.

15. AutoQoS is a macro that creates and applies quality of service configurations based on Cisco best-practice recommendations.

16. Inter-Switch Link.

17. 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

18. A TCP variable that defines the largest number of bytes allowed in a TCP segment's Data field. The calculation does not include the TCP header. With a typical IP MTU of 1500 bytes - the resulting default MSS would be 1460. TCP hosts must support an M

19. Aka receiver's advertised window.

20. Area Border Router. An OSPF router that connects to the backbone area and to one or more non-backbone areas.

21. After a host receives an IGMP Query - the amount of time (default - 10 seconds) the host has to send the IGMP Report.

22. Context-Based Access Control.

23. A Cisco IOS feature that performs deep packet inspection to classify packets based on application layer information.

24. A name used for DS1 lines inside the North American TDM hierarchy.

25. Cisco-proprietary STP feature in which an access layer switch is configured to be unlikely to become Root or to become a transit switch. Also - convergence upon the loss of the switch's Root Port takes place in a few seconds.

26. A dotted-decimal number used to help define the structure of an IP address. The binary 0s in the mask identify the host portion of an address - and the binary 1s identify either the combined network and subnet part (when thinking classfully) or the n

27. WRED compares this setting to the average queue depth to decide whether packets should be discarded. All packets are discarded if the average queue depth rises above this maximum threshold.

28. Another name for Superframe.

29. Edge LSR.

30. Defined in RFC 2091 - the extensions define how RIP may send a full update once - and then send updates only when routes change - when an update is requested - or when a RIP interface changes state from down to up.

31. The portion of PPP focused on negotiating IP features

32. Finish time.

33. A BGP feature that defines the IP TTL field value in packets sent between two eBGP peers. This feature is required when using IP addresses other than the interface IP address on the link between peers.

34. An exterior routing protocol designed to exchange prefix information between different autonomous systems. The information includes a rich set of characteristics called path attributes - which in turn allows for great flexibility regarding routing ch

35. 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.

36. A well-known discretionary BGP path attribute that flags a route as being a summary route.

37. An SPF calculation for which a router does not need to run SPF for any LSAs inside its area - but instead runs a very simple algorithm for changes to LSAs outside its own area.

38. Used by RRs to denote the RID of the iBGP neighbor that injected the NLRI into the AS.

39. Controls access to the Internet in public wireless LANs.

40. 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.

41. Layer x PDU.

42. EIGRP (and IGRP) allows for the use of bandwidth - load - delay - MTU - and link reliability; the K values refer to an integer constant that includes these five possible metric components. Only bandwidth and delay are used by default - to minimize re

43. Backward Explicit Congestion Notification.

44. Virtual LAN.

45. Neighbor Discovery Protocol.

46. CDP Control Protocol.

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

48. A term used in this book to refer to a route that is included in a larger summary route.

49. An MPLS VPN term referring to an LSR that has no direct customer connections - meaning that the P router does not need any visibility into the VPN customer's IP address space.

50. Expedited Forwarding.