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CCIE Vocab

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Digital Signal Level 3.






2. A CBWFQ and LLQ term referring to the bandwidth on an interface that is neither reserved nor allocated via a priority command.






3. A protection against problems caused by unidirectional links between two switches. Uses messaging between switches to detect the loop - err-disabling the port when the link is unidirectional.






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






5. DCE devices are one of two devices on either end of a communications circuit - specifically the device with more control over the communications. Frame Relay switches are DCE devices. DCEs are also known as data circuit-terminating equipment (DTE).






6. Often used synonymously with neighbor - but with emphasis on the fact that all required parameters match - allowing routing updates to be exchanged between the routers.






7. A multicast routing protocol whose default action is to flood multicast packets throughout a network.






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






9. When subnetting a class A - B - or C address - the subnet for which all subnet bits are binary 0.






10. A 3-bit field in the first 3 bits of the ToS byte in the IP header - used for QoS marking.






11. With EIGRP - the metric value for the lowest-metric route to a particular subnet.






12. A mapping between each DSCP value and a corresponding CoS value - often used in Cisco LAN switches when performing classification for egress queuing.






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






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






15. 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.






16. Retransmission Timeout.






17. In OSPF - a router that is prepared to take over the designated router.






18. The process of changing the electrical characteristics on a transmission medium - based on defined rules - to represent data.






19. An 802.1d STP port state in which the port has been administratively disabled.






20. Web Cache Communication Protocol.






21. With shaping - the number of bits allowed to be sent every Tc. Also defines the size of the token bucket when Be = 0.






22. Point-to-Point Protocol.






23. 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.






24. A Cisco IOS feature that provides reporting information to a NetFlow aggregator based on traffic flows.






25. 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.






26. A 48-bit address that is calculated from a Layer 3 multicast address by using 0x0100.5E as the multicast vendor code (OUI) for the first 24 bits - always binary 0 for the 25th bit - and copying the last 23 bits of the Layer 3 multicast address.






27. A mechanism in which VLAN information can extend over another set of 802.1Q trunks by tunneling the original 802.1Q traffic with another 802.1Q tag. It allows a service provider to support transparent VLAN services with multiple customers - even if t






28. The process of taking routes known through one routing protocol and advertising those routes with another routing protocol.






29. Internet Group Management Protocol.






30. A type of AS_PATH segment consisting of an ordered list of ASNs through which the route has been advertised.






31. The range 239.0.0.0 through 239.255.255.255 that IANA has assigned for use in private multicast domains.






32. An 802.1w RSTP port state in which the port is not forwarding or receiving; covers 802.1d port states disabled - blocking - and listening.






33. An EIGRP message that is used to acknowledge reliable EIGRP messages - namely Update - Query - and Reply messages. Acks do not require an Ack.






34. In wireless LANs - a mechanism that counters issues related to RF interference by dividing a larger 802.11 data frame into smaller frames that are sent independently to the destination. See also LFI.






35. EIGRP jargon meaning that EIGRP has placed a route into active status.






36. 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






37. A network/subnet to which only one OSPF router is connected.






38. With EIGRP - a timer started when a reliable (to be acknowledged) message is transmitted. For any neighbor(s) failing to respond in its RTO - the RTP protocol causes retransmission. RTO is calculated based on SRTT.






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






40. 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 remove the attribute before advertisi






41. The PDU used by a particular layer of a networking model - with x defining the layer.






42. The feature in a Cisco IOS device by which a terminal session's previously typed commands are remembered - allowing the user to recall the old commands to the command line through a simple key sequence (for example - the up-arrow key).






43. Backup designated router.






44. One of the two modes of MDRR - in which the priority queue is serviced between each servicing of the non-priority queues.






45. A BGP term referring to an IP prefix and prefix length.






46. Cisco Group Management Protocol.






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






48. 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






49. The mandatory contention-based 802.11 access protocol that is also referred to as CSMA/CA.






50. A type of OSPF packet used to discover neighbors - check for parameter agreement - and monitor the health of another router.