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CCIE Vocab

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  • Answer 50 questions in 15 minutes.
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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. Defined in IEEE 802.1w - a specification to enhance the 802.1d standard to improve the speed of STP convergence.






2. 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.






3. 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






4. In IP routing - a term referring to the building of IP routing tables by IP routing protocols.






5. A name used for DS3 lines inside the European TDM hierarchy.






6. 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.






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






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






9. 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.






10. A method of obtaining an IPv6 address that uses DHCPv6. See also stateless autoconfiguration.






11. In IP routing - a term referring to the process of forwarding packets through a router.






12. 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.






13. Neighbor Solicitation.






14. Low-latency queuing.






15. High Density Binary 3.






16. The initial 802.11 common key encryption mechanism; vulnerable to hackers.






17. Designated router.






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






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






20. A feature of Ethernet NICs. When the NIC transmits an electrical signal - it "loops" the transmitted electrical current back onto the receive pair. By doing so - if another NIC transmits a frame at the same time - the NIC can detect the overlapping r






21. 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.






22. A method of collecting traffic received on a switch port or a VLAN and sending it to specific destination ports on a switch other than the one on which it was received.






23. 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.






24. Retransmission Timeout.






25. Weighted tail drop.






26. The IPv6 protocol used for the discovery of which hosts are listening for which multicast IP addresses for IPv6.






27. From one multicast router's perspective - the upstream router is another router that has just forwarded a multicast packet to that router.






28. A Cisco IOS queuing tool most notable for its scheduler - which always services the high-priority queue over all other queues.






29. An exterior routing protocol that predates BGP. It is no longer used today.






30. Link Aggregation Control Protocol.






31. A term referring to the process of applying the Message Digest 5 (MD5) algorithm to a string - resulting in another value. The original string cannot be easily computed even when the hash is known - making this process a strong method for storing pas






32. Defined in IEEE 802.1d - a protocol used on LAN bridges and switches to dynamically define a logical network topology that allows all devices to be reached - but prevents the formation of loops.






33. Tag Distribution Protocol.






34. The number of beacons that governs how often multicast frames are sent over a wireless LAN.






35. The RMON function of tracking a particular variable. RMON events trigger RMON alarms.






36. A communication protocol between hosts and a multicast router by which routers learn of which multicast groups' packets need to be forwarded onto a LAN.






37. A Cisco switch feature that permits limiting traffic arriving at switch ports by percentage or absolute bandwidth. Separate thresholds are available per port for unicast - multicast - and broadcast traffic.






38. Aka receiver's advertised window.






39. The data structure used by OSPF to hold LSAs.






40. In Frame Relay - a link between a router and a Frame Relay switch.






41. Differentiated Services.






42. Virtual LAN.






43. Any OSPF neighbor for which the database flooding process has completed.






44. Point-to-Point Protocol over Ethernet. A convention often used as the data link protocol over Cable in which Ethernet is used as the data link protocol - but with PPP being encapsulated inside Ethernet. The combination gives the data link features of






45. 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






46. A reserved value for the BGP COMMUNITY path attribute that implies that the route should not be advertised outside the local AS.






47. A type of logic for how a router uses a default route. When a default route exists - and the class A - B - or C network for the destination IP address does not exist in the routing table - the default route is used. If any part of that classful netwo






48. A 3-bit field in an ISL header used for marking frames. Also - used generically to refer to either the ISL CoS field or the 802.1Q User Priority field.






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. An alternative software loaded into a Cisco router - used for low-level debugging and for password recovery.







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