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CCIE Vocab

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  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 reserved value for the BGP COMMUNITY path attribute that implies that the route should not be advertised to any other peer.






2. Layer x PDU.






3. 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.






4. The information maintained by a router for each multicast entry in its multicast routing table - such as incoming interface - outgoing interface list - Uptime timer - Expire timer - etc.






5. Data Carrier Detect.






6. Jargon referring to any queue that receives priority service - often used for queues in an LLQ configuration that have the priority command configured.






7. 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






8. A route that is created to represent one or more smaller component routes - typically in an effort to reduce the size of routing and topology tables.






9. Provider router.






10. The 802.1X driver that supplies a username/password prompt to the user and sends/receives the EAPoL messages.






11. A vendor consortium that formerly worked to further Frame Relay common vendor standards.






12. Defined in IEEE 802.1d - a protocol used on LAN bridges and switches to dynamically define a logical network topology that allows all devices to be reached - but prevents the formation of loops.






13. Jargon referring to a policer action through which - instead of discarding an out-of-contract packet - the policer marks a different IPP or DSCP value - allowing the packet to continue on its way - but making the packet more likely to be discarded la






14. The innermost MPLS header in an packet traversing an MPLS VPN - with the label value identifying the forwarding details for the egress PE's VRF associated with that VPN.






15. UniDirectional Link Detection.






16. Link Fragmentation and Interleaving.






17. Feasible distance.






18. Rapid Spanning Tree Protocol.






19. The original MPLS protocol used to advertise the binding (mapping) information about each particular IP prefix and associated label. It is slightly different from LDP - but functionally equivalent. See also LDP.






20. 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.






21. An MPLS LSR that can forward and receive both labeled and unlabeled packets.






22. When a Query is received from a router - each host randomly picks a time between 0 and the Maximum Response Time period to send a Report. When the host with the smallest time period first sends the Report - the rest of the hosts suppress their report






23. A subset of a classful IP network - as defined by a subnet mask - which used to address IP hosts on the same Layer 2 network in much the same way as a classful network is used.






24. Protocol Independent Multicast sparse-mode routing protocol.






25. Extensible Authentication Protocol.






26. Class of Service.






27. 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.






28. A name used for DS3 lines inside the European TDM hierarchy.






29. The SNMP specifications - standardized in RFCs - defining the rules by which SNMP MIB variables should be defined.






30. 16 bits between the interface ID and global routing prefix in an IPv6 global address - used for subnet assignment inside an enterprise.






31. A single label and link that is part of a complete LDP. See also label switched path.






32. Orthogonal frequency division multiplexing.






33. 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






34. The combination of PVST+ and Rapid Spanning Tree. It provides subsecond convergence time and is compatible with PVST+ and MSTP.






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






36. A mechanism used by TCP senders to limit the dynamic window for a TCP connection - to reduce the sending rate when packet loss occurs. The sender considers both the advertised window size and CWND - using the smaller of the two.






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






38. In MPLS VPNs - a 64-bit Extended Community path attribute attached to a BGP route for the purpose of controlling into which VRFs the route is added.






39. Defined in RFC 826 - a protocol used on LANs so that an IP host can discover the MAC address of another device that is using a particular IP address.






40. A state for a route in an EIGRP topology table that indicates that the router is actively sending Query messages for this route - attempting to validate and learn the current best route to that subnet.






41. An MPLS data structure used for forwarding labeled packets. The LFIB lists the incoming label - which is compared to the incoming packet's label - along with forwarding instructions for the packet.






42. After a host receives an IGMP Query - the amount of time (default - 10 seconds) the host has to send the IGMP Report.






43. Class-Based Weighted Fair Queuing.






44. A protocol - defined in RFC 2865 - that defines how to perform authentication between an authenticator (for example - a router) and an authentication server that holds a list of usernames and passwords.






45. The encapsulation of EAP messages directly inside LAN frames. This encapsulation is used between the supplicant and the authenticator.






46. Also called VLAN trunking - a method (using either the Cisco ISL protocol or the IEEE 802.1Q protocol) to support carrying traffic between switches for multiple VLANs that have members on more than one switch.






47. A type of OSPF NSSA area for which neither external (type 5) LSAs are introduced - nor type 3 summary LSAs; instead - the ABRs originate and inject default routes into the area. External routes can be injected into a totally NSSA area.






48. 64 bits at the end of an IPv6 global address - used to uniquely identify each host in a subnet.






49. Network Address Translation-Protocol Translation.






50. An 802.1d STP port state in which the port does not send or receive frames - except for listening for received Hello BPDUs.







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