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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 set of rules by which BGP examines the details of multiple BGP routes for the same NLRI and chooses the single best BGP route to install in the local BGP table.






2. In MPLS - the mapping of an IP prefix and a label - which is then advertised to neighbors using LDP.






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






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






5. A Cisco-proprietary LMI protocol - implemented in Cisco WAN switches and routers - through which the switch can inform the router about parameters for each VC - including CIR - Bc - and Be.






6. Inside telcos' original TDM hierarchy - a unit that combines multiple DS0s into a single channel






7. High Density Binary 3.






8. Dynamic Host Configuration Protocol.






9. Enhanced Local Management Interface.






10. The notation in a Cisco IOS IP routing table that identifies the route used by that router as the default route.






11. A message that each host sends - either in response to a router Query message or on its own - to all multicast groups for which it would like to receive multicast traffic.






12. 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.






13. Bootstrap Router.






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






15. Digital Signal Level 0.






16. Jargon referring to the minimum value to which adaptive shaping will lower the shaping rate.






17. The IEEE standardized protocol for VLAN trunking.






18. The multicast addresses assigned by IANA.






19. A mapping between each DSCP value and a WRED threshold - often used in Cisco LAN switches when performing WRED.






20. Ethernet feature in which a NIC or Ethernet port can both transmit and receive at the same instant in time. It can be used only when there is no possibility of collisions. Loopback circuitry on NIC cards is disabled to use full duplex.






21. Route Target.






22. 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.






23. In the context of SNMP - the Set command is sent by an SNMP manager - to an agent - requesting that the agent set a single identified variable to the stated value. The main purpose is to allow remote configuration and remote operation - such as shutt






24. A 3-bit field in an 802.1Q header used for marking frames.






25. A TCP variable that defines the largest number of bytes allowed in a TCP segment's Data field. The calculation does not include the TCP header. With a typical IP MTU of 1500 bytes - the resulting default MSS would be 1460. TCP hosts must support an M






26. 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.






27. Spanning Tree Protocol.






28. A switch feature in which the switch examines DHCP messages and - for untrusted ports - filters all messages typically sent by servers and inappropriate messages sent by clients. It also builds a DHCP snooping binding table that is used by DAI and IP






29. The characterization of how far EIGRP Query messages flow away from the router that first notices a failed route and goes active for a particular subnet.






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






31. Bipolar Violation.






32. In IPv6 - a Router Advertisement message used by an IPv6 router to send information about itself to nodes and other routers connected to that router.






33. A route that is used for forwarding packets when the packet does not match any more specific routes in the IP routing table.






34. In TCP - a TCP host sets the TCP header's Window field to the number of bytes it allows the other host to send before requiring an acknowledgement. In effect - the receiving host - by stating a particular window size - grants the sending host the rig

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35. 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.






36. Carrier sense multiple access with collision detection. A media-access mechanism where devices ready to transmit data first check the channel for a carrier. If no carrier is sensed for a specific period of time - a device can transmit. If two devices






37. Cisco IOS router feature by which a route map determines how to forward a packet - typically based on information in the packet other than the destination IP address.






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






39. A small FIFO queue associated with each router's physical interface - for the purpose of making packets available to the interface hardware - removing the need for a CPU interrupt to start sending the next packet out the interface.






40. Another term for summary route.






41. Exterior Gateway Protocol.






42. 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






43. The one VLAN on an 802.1Q trunk for which the endpoints do not add the 4-byte 802.1Q tag when transmitting frames in that VLAN.






44. 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.






45. Internal BGP.






46. An 802.1d STP transitory port state in which the port does not send or receive frames - and does not learn MAC addresses - but does wait for STP convergence and for CAM flushing by the switches in the network.






47. Another name for Superframe.






48. A Cisco IOS queuing tool most notable for its scheduler - which always services the high-priority queue over all other queues.






49. An MQC configuration style by which one policy map calls a second policy map. For example - a shaping policy map can call an LLQ policy map to implement LLQ for packets shaped by CB Shaping.






50. With private VLANs - a port that can send and receive frames with all other ports in the private VLAN.