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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. In MPLS - a term used to define a label that an LSR learned from a neighboring LSR.






2. The process of taking a PDU from some other source and placing a header in front of the original PDU - and possibly a trailer behind it.






3. A prestandard (at the time of publication) wireless LAN physical layer that offers data rates in the hundreds of megabits per second.






4. Excess Burst.






5. A type of spread spectrum that spreads RF signals over the frequency spectrum by representing each data bit by a longer code. 802.11b specifies the use of DSSS.






6. 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.






7. 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.






8. Ethernet MAC address that represents all devices on the LAN.






9. The rate at which a policer limits the bits exiting or entering the policer.






10. An attack by which the attacker initiates many TCP connections to a server - but does not complete the TCP connections - by simply not sending the third segment normally used to establish the connection. The server may consume resources and reject ne






11. Data-link connection identifier.






12. With EIGRP - for a particular route - the case in which the RD is lower than the FD.






13. 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).






14. High Density Binary 3.






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






16. Time to Live.






17. 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






18. A calculation of the length of the AS_PATH PA - which includes 1 for each number in the AS_SEQ - 1 for an entire AS_SET segment - and possibly other considerations.






19. The common set of IOS configuration commands that is used with each QoS feature whose name begins with "Class-Based."






20. WRED compares this setting to the average queue depth to decide whether packets should be discarded. No packets are discarded if the average queue depth falls below this minimum threshold.






21. An Internet standard authentication protocol that uses secure hashes and a three-way handshake to perform authentication over a PPP link.






22. A switch feature that limits the number of allowed MAC addresses on a port - with optional limits based on the actual values of the MAC addresses.






23. A process on a computing device that accepts SNMP requests - responds with SNMP-structured MIB data - and initiates unsolicited Trap messages back to an SNMP management station.






24. 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






25. A set of all devices that receive broadcast frames originating from any device within the set. Devices in the same VLAN are in the same broadcast domain.






26. A Cisco IOS queuing tool most notable for its automatic classification of packets into separate per-flow queues.






27. Calculated measurement based on the actual queue depth and the previous average. Designed to allow WRED to adjust slowly to rapid changes of the actual queue depth.






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






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






30. Inside telcos' original TDM hierarchy - the smallest unit of transmission at 64 kbps.






31. An early standard from AT&T for encoding analog voice as a digital signal for transmission over a TDM network. PCM requires 64 kbps - and is the basis for the DS0 speed.






32. A state variable kept by a router for each known neighbor or potential neighbor.






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






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






35. Common Spanning Tree.






36. Dynamic Host Configuration Protocol.






37. A possible side effect of a scheduler that performs strict-priority scheduling of a queue - which can result in lower-priority queues getting little or no service.






38. A wireless LAN that only includes wireless users and no access points. 802.11 data frames in an ad hoc network travel directly between wireless users.






39. Any routing protocol that uses the concept of using the SPF algorithm with an LSDB to compute routes.






40. 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.






41. Frequency hopping spread spectrum.






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






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






44. Forwarding Equivalence Class.






45. The All OSPF DR Routers multicast IP address - listened for by DR and BDR routers.






46. Defined in IEEE 802.1w - a specification to enhance the 802.1d standard to improve the speed of STP convergence.






47. Variable name for the time interval used by shapers and by CAR.






48. The actual number of packets in a queue at a particular time.






49. Each 802.11 station passively monitors each RF channel for a specific amount of time and listens for beacons. Stations use the signal strengths of found beacons to determine the access point or ad hoc network with which to attempt association.






50. Regeneration of the Layer 2 encapsulation removed from frames forwarded in a SPAN session.