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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. Ethernet feature in which a NIC or Ethernet port can only transmit or receive at the same instant in time - but not both. Half duplex is required when a possibility of collisions exists.






2. As defined in RFC 3623 - graceful restart allows for uninterrupted forwarding in the event that an OSPF router's OSPF routing process must restart. The router does this by first notifying the neighbor routers that the restart is about to occur; the n






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






4. A 3-bit field in an MPLS header used for marking frames.






5. Rapid Spanning Tree Protocol.






6. An IPv6/IPv4 tunneling method that is designed for transporting IPv6 packets within a site where a native IPv6 infrastructures is not available.






7. Forward Explicit Congestion Notification.






8. 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.






9. Defined in RFC 3748 - the protocol used by IEEE 802.1X for exchanging authentication information.






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






11. An 802.1w RSTP port state in which the port is not the Root Port but is available to become the root port if the current root port goes down.






12. A table inside a router that holds the path attributes and NLRI known by the BGP implementation on that router.






13. Modular QoS CLI.






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






15. The portion of PPP focused on features that are unrelated to any specific Layer 3 protocol.






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






17. Cisco-proprietary VLAN trunking protocol.






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






19. An FRF standard for Frame Relay-to-ATM Service Interworking in which both DTEs use Frame Relay - with ATM in between.






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






21. Quantum value.






22. A BGP message that includes withdrawn routes - path attributes - and NLRI.






23. The structure inside telcos' original digital circuit build-out in the mid-1900s - based upon using TDM to combine and disperse smaller DS levels into larger levels - and vice versa.






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






25. Provider edge.






26. An 802.1d STP port state in which the port has been administratively disabled.






27. A method of obtaining an IPv6 address that uses DHCPv6. See also stateless autoconfiguration.






28. A WRED process by which WRED does not discard packets during times in which a queue's minimum threshold has not been passed.






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






30. Customer edge.






31. A TCP variable used as the basis for a TCP sender's timer defining how long it should wait for a missing acknowledgement before resending the data.






32. A numeric value between 0 and 32 (inclusive) that defines the number of beginning bits in an IP address for which all IP addresses in the same group have the same value. Alternative: The number of binary 1s beginning a subnet mask - written as a deci






33. Database Description.






34. 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.






35. 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.






36. An IPv6 migration strategy in which a host or router supports both IPv4 and IPv6 natively.






37. A name used for DS1 lines inside the North American TDM hierarchy.






38. Context-Based Access Control.






39. In BGP - a set of routers inside a single administrative authority - grouped together for the purpose of controlling routing policies for the routes advertised by that group to the Internet.






40. A characterization of a BGP path attribute in which BGP implementations are not required to support the attribute (optional) - and for which if a router receives a route with such an attribute - the router should remove the attribute before advertisi






41. A BGP path attribute that allows routers in one AS to set a value and advertise it into a neighboring AS - impacting the decision process in that neighboring AS. A smaller value is considered better. Also called the BGP metric.






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






43. Internet Group Management Protocol.






44. 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.






45. A CBWFQ and LLQ term referring to the bandwidth on an interface that is neither reserved nor allocated via a priority command.






46. Slow Start Threshold.






47. An early T1 framing standard.






48. A dotted-decimal number that represents a subnet. It is the lowest numeric value in the range of IP addresses implied by a subnet number and prefix/mask.






49. A 48-bit address that is calculated from a Layer 3 multicast address by using 0x0100.5E as the multicast vendor code (OUI) for the first 24 bits - always binary 0 for the 25th bit - and copying the last 23 bits of the Layer 3 multicast address.






50. Alternate name for the SPF algorithm - named for its inventor - Edsger W. Dijkstra.