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






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






3. In IPv6 - the Neighbor Discovery message used by an IPv6 node to request information about a neighbor or neighbors.






4. The process of taking the IP - UDP - and RTP headers of a voice or video packet - compressing them - and then uncompressing them on the receiving router.






5. A workstation or server configured to collect and present RMON data for reporting purposes.






6. A Cisco-proprietary feature. After a Cisco multicast router receives IGMP Join or Leave messages from hosts - it communicates to the connected Cisco switches - telling them which hosts (based on their unicast MAC addresses) have joined or left each m






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






8. A Cisco IOS configuration tool for routing protocols by which routing updates may be filtered.






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






10. A Cisco IOS interface software queue queuing strategy implemented automatically when using either form of Frame Relay fragmentation. The system then interleaves packets from the high-priority queue between fragments of the medium-priority queue.






11. Each 802.11 station periodically sends a probe request frame on each RF channel and monitors probe response frames that all access points within range send back. Stations use the signal strength of the probe response frames to determine which access






12. Controls the distribution of multicast traffic for the private multicast address range 239.0.0.0 to 239.255.255.255 by configuring a filter and applying it on the interfaces.






13. A Cisco-proprietary messaging protocol implemented in WAN switches that can be used to signal network status - including congestion - independent of end-user frames and cells.






14. IP multicast address range from 224.0.0.0 through 239.255.255.255.






15. A network/subnet over which two or more OSPF routers have become neighbors - thereby being able to forward packets from one router to another across that network.






16. A conceptual model used by CB Policing when using an excess burst.






17. Time-division multiplexing.






18. 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.






19. The operating mode of shaped round-robin that provides a low-latency queue with policing.






20. A name used for DS1 lines inside the European TDM hierarchy.






21. Mark probability denominator.






22. An IEEE standard that - when used with EAP - provides user authentication before their connected switch port allows the device to fully use the LAN.






23. When subnetting a class A - B - or C address - the subnet for which all subnet bits are binary 1.






24. A bit in the ATM cell header that - when set to 1 - means that if a device needs to discard frames - it should discard the frames with DE 1 first.






25. On a serial cable - the pin lead set by the DCE to tell the DTE that the DTE is allowed send data.






26. Enhances RP redundancy by providing a method for RPs to exchange multicast source information - even between multicast domains.






27. 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.






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






29. The Lempel Ziv STAC compression algorithm is used in Frame Relay networks to define dynamic dictionary entries that list a binary string from the compressed data and an associated smaller string that represents it during transmission






30. Label Distribution Protocol.






31. A term relating to Cisco LAN switch tail-drop logic - in which multiple tail-drop thresholds may be assigned based on CoS or DSCP - resulting in some frames being discarded more aggressively than others.






32. Multilink PPP.






33. A field in the IP header that is decremented at each pass through a Layer 3 forwarding device.






34. Sent by a PIM router - by default every 30 seconds - on every interface on which PIM is configured to discover neighbors - establish adjacency - and maintain adjacency.






35. A queue created by Cisco IOS as a result of the configuration of a queuing tool.






36. A method for how a TCP sender grows its calculated CWND variable - thereby growing the allowed window for the connection. Congestion Avoidance grows CWND linearly.






37. A term referring to EIGRP's internal processing logic.






38. Assured Forwarding. A set of DiffServ PHBs that defines 12 DSCP values - with four queuing classes and three drop probabilities within each queuing class.






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






41. Another term for Port Address Translation. See PAT.






42. Challenge Handshake Authentication Protocol.






43. A calculated TCP variable - used along with the TCP CWND variable - to dictate a TCP sender's behavior when it recognizes packet loss. As CWND grows after packet loss - the TCP sender increases CWND based on Slow Start rules - until CWND grows to be






44. Network Address Translation-Protocol Translation.






45. Weighted tail drop.






46. 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.






47. A BGP ASN whose value is between 64 -512 and 65 -535. These values are not assigned for use on the Internet - and can be used for private purposes - typically either within confederations or by ISPs to hide the ASN used by some customers.






48. When a PIM-SM router switches from RPT to SPT - it sends a PIM-SM Prune message for the source and the group with the RP bit set to its upstream router on the shared tree. RFC 2362 uses the notation PIM-SM (S - G) RP-bit Prune for this message.






49. Aka network layer reachability information.






50. With RIP - a per-route timer that increases until the router receives a routing update that confirms the route is still valid - upon which the timer is reset to 0. If the updates cease - the Invalid timer will grow - until reaching the timer setting