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CCIE Vocab

Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 message sent by the multicast router - by default every 60 seconds - on each of its LAN interfaces to determine whether any host wants to receive multicast traffic for any group.






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






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






4. Internal BGP.






5. 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






6. Rendezvous point.






7. The IP address used by hosts as the default gateway in a VRRP configuration. This address is shared by two or more VRRP routers - much as HSRP works.






8. The content engine in a WCCP cluster - which determines how traffic will be distributed within the cluster.






9. 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.






10. A Cisco IOS queuing tool most notable for its reservation of a minimum bandwidth for each queue.






11. 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.






12. Low-latency queuing.






13. In two-rate policing - the second and higher rate defined to the policer.






14. Class-Based Marking.






15. An MPLS VPN term referring to the more efficient choice of popping the outer label at the second-to-last (penultimate) LSR - which then prevents the egress PE from having to perform two LFIB lookups to forward the packet.






16. The portions of PPP focused on features that are related to specific Layer 3 protocols.






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






18. When multiple routers are connected to a subnet - only one should be sending IGMP queries. It is called a querier. IGMPv1 does not have any rules for electing a querier. In IGMPv2 and IGMPv3 - a router with the lowest interface IP address on the subn






19. Digital Signal Level 0.






20. Reported distance or Route Distinguisher.






21. Alternate Mark Inversion. A serial-line encoding standard that sends alternating positive and negative 3-volt signals for binary 1 - and no signal (0 V) for binary 0.






22. 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.






23. Protocol data unit.






24. A single instance of STP that is applied to multiple VLANs - typically when using the 802.1Q trunking standard.






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






26. The signal strength of the RF signal at the output of the radio card or access point transmitter - before being fed into the antenna. Measured in milliwatts - watts - or dBm.






27. Label Forwarding Information Base.






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






29. Virtual circuit.






30. A Frame Relay traffic shaping feature during which the shaping rate is reduced when the shaper notices congestion through the receipt of BECN or ForeSight messages.






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






32. A term referring to the MQC class-map command and its related subcommands - which are used for classifying packets.






33. Cisco-proprietary STP feature in which an access layer switch is configured to be unlikely to become Root or to become a transit switch. Also - convergence upon the loss of the switch's Root Port takes place in a few seconds.






34. An IPv6 address format used for publicly registered IPv6 addresses.






35. Extended Superframe.






36. On a multiaccess network - when a PIM-DM or PIM-SM router receives a Prune message - it starts a 3-second timer. If it receives a Join message on the multiaccess network from another router before the timer expires - it considers the message as an ov






37. Diffusing Update Algorithm.






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. An MPLS term referring to any device that can forward packets that have MPLS labels.






40. 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






41. 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.






42. The RFC-standard MPLS protocol used to advertise the binding (mapping) information about each particular IP prefix and associated label. See also TDP.






43. An E-LSR in an MPLS VPN network whose role in a particular discussion is to receive labeled packets from other LSRs and then forward the packets as unlabeled packets to CE routers.






44. Service set identifier.






45. 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






46. A type of OSPF packet used to exchange and acknowledge LSA headers. Sometimes called DBD.






47. A method of providing dynamically configured spoke-to-spoke VPN connectivity in a hub-and-spoke network that significantly reduces configuration required on the spoke routers compared to traditional IPsec VPN environments.






48. A message sent by a multicast router - by default every 125 seconds - on each of its LAN interfaces to determine whether any host wants to receive multicast traffic for any group.






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






50. A Frame Relay address used in Frame Relay headers to identify the VC







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