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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. An issue whereby parts of the RF signal take different paths from the source to the destination - which causes direct and reflected signals to reach the receiver at different times - and corresponding bit errors.






2. 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






3. A queuing scheduler's logic by which - if a particular queue has packets in it - those packets always get serviced next.






4. 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.






5. A Cisco router feature in which the router works to prevent SYN attacks either by monitoring TCP connections flowing through the router - or by actively terminating TCP connection until the TCP connection is established and then knitting the client-s






6. In MPLS VPNs - an entity in a single router that provides a means to separate routes in different VPNs. The VRF includes per-VRF instances of routing protocols - a routing table - and an associated CEF FIB.






7. In the PIM-SM design - the process by which a PIM-SM router can build the SPT between itself and the source of a multicast group and take advantage of the most efficient path available from the source to the router as long as it has one directly conn






8. A BGP router in an AS that uses route reflectors - but that is not aided by any RR server.






9. 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






10. A method for optimizing the flow of multicast IP packets passing through a LAN switch. The switch using IGMP snooping examines IGMP messages to determine which ports need to receive traffic for each multicast group.






11. With EIGRP - a route that is not a successor route - but that meets the feasibility condition; can be used when the successor route fails - without causing loops.






12. IP Control Protocol.






13. Also known as triggered updates.






14. With DiffServ - a DSCP marking and a related set of QoS actions applied to packets that have that marking.






15. Inside telcos' original TDM hierarchy - a unit that combines multiple DS1s into a single channel






16. Priority queue and priority queuing.






17. Peak information rate.






18. A standard (RFC 2131) protocol by which a host can dynamically broadcast a request for a server to assign to it an IP address - along with other configuration settings - including a subnet mask and default gateway IP address. DHCP provides a great de






19. Differentiated Services Code Point.






20. The term referring to a group of iBGP routers in a confederation - with the group members being assigned a hidden ASN for the purposes of loop avoidance.






21. Used by WRED to calculate the rate at which the average queue depth changes as compared with the current queue depth. The larger the number - the slower the change in the average queue depth.






22. Low-latency queuing.






23. In MQC and CB Policing - a configuration style by which - for one category of packets (conform - exceed - or violate) - more than one marking action is defined for a single category. For example - marking DSCP and DE.






24. Timer An STP timer that dictates how long a port should stay in the listening state and the learning state.






25. Cisco-proprietary STP feature in which a switch port - known to not have a bridge or switch attached to it - transitions from disabled to forwarding state without using any intermediate states.






26. A method for how a TCP sender grows its calculated CWND variable - thereby growing the allowed window for the connection. Slow Start grows CWND at an exponential rate.






27. Link Fragmentation and Interleaving.






28. An event in which a new packet arrives - needing to be placed into a queue - and the queue is full






29. The specific frequency subband on which the radio card or access point is operating. The RF channel is set in the access point or ad hoc stations.






30. Forwarding Information Base.






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






32. A wireless LAN physical layer that operates at up to 54-Mbps data rates using OFDM in the 5-GHz band.






33. 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






34. Secure Copy Protocol - one of the many ways of transferring files to and from Cisco IOS routers and switches.






35. With some routing protocols - the time period between successive Hello messages.






36. Modular QoS CLI.






37. Link-State Acknowledgment.






38. A configuration tool in Cisco IOS that allows basic programming logic to be applied to a set of items. Often used for decisions about what routes to redistribute - and for setting particular characteristics of those routes






39. Bipolar 8 Zero Substitution. A serial-line encoding standard that substitutes Bipolar Violations in a string of eight binary 0s to provide enough signal transitions to maintain synchronization.






40. A state for a route in an EIGRP topology table that indicates that the router believes that the route is stable - and it is not currently looking for any new routes to that subnet.






41. An ITU standard Frame Relay header - including the DLCI - DE - FECN - and BECN bits in the LAPF header - and a frame check in the LAPF trailer.






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






43. An OSPF area into which external (type 5) LSAs are not introduced by its ABRs; instead - the ABRs originate and inject default routes into the area.






44. On a serial cable - the pin lead set by the DTE to imply that the DTE is ready to signal using pin leads.






45. A router that should not be used to forward packets between other routers. Other routers will not send Query messages to a stub router.






46. Committed information rate.






47. Data Terminal Ready.






48. IP multicast address range from 224.0.0.0 through 239.255.255.255.






49. 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.






50. The multicast IP address 224.0.0.6 - listened for by DR and BDR routers.