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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. Maximum Response Time.






2. With OSPF - the encapsulation of OSPF messages inside IP - to a router with which no common subnet is shared - for the purpose of either mending partitioned areas or providing a connection from some remote area to the backbone area.






3. The Lempel Ziv STAC compression algorithm is used in Frame Relay networks to define dynamic dictionary entries that list a binary string from the compressed data and an associated smaller string that represents it during transmission






4. 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).






5. IP Control Protocol.






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






7. With EIGRP - the route to each destination for which the metric is the lowest of all known routes to that network.






8. 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.






9. A PPP feature used to load balance multiple parallel links at Layer 2 by fragmenting frames - sending one frame over each of the links in the bundle - and reassembling them at the receiving end of the link.






10. 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.






11. Layer 2 payload compression.






12. With a routing update - or routing table entry - the portion of a route that defines the next router to which a packet should be sent to reach the destination subnet. With routing protocols - the Next Hop field may define a router other than the rout






13. A designated router that is directly connected with a source of the multicast group.






14. Network Address Translation.






15. An SPF calculation as a result of changes inside the same area as a router - for which the SPF run must examine the full LSDB.






16. 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.






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






18. The first 6 bits of the DS field - used for QoS marking.






19. A protection against problems caused by unidirectional links between two switches. Uses messaging between switches to detect the loop - err-disabling the port when the link is unidirectional.






20. Digital subscriber line - a common Internet service type for residential and business customers.






21. In IP routing - a term referring to the process of forwarding packets through a router.






22. With Spanning Tree Protocol - the single port on each LAN segment from which the best Hello BPDU is forwarded.






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






24. One of the two modes of MDRR - in which the priority queue is serviced between each servicing of the non-priority queues.






25. An optimized Layer 3 forwarding path through a router or switch. CEF optimizes routing table lookup by creating a special - easily searched tree structure based on the contents of the IP routing table. The forwarding information is called the Forward






26. An IPv6 address type that is used by a number of hosts in a network that are providing the same service. Hosts accessing the service are routed to the nearest host in an anycast environment based on routing protocol metrics.






27. A switch feature that examines incoming frames - comparing the source IP and MAC addresses to the DHCP snooping binding database - filtering frames whose addresses are not listed in the database for the incoming interface.






28. The router in a VRRP group that is currently actively forwarding IP packets. Conceptually the same as an HSRP Active router.






29. Cisco-proprietary STP feature in which switches use messaging to confirm the loss of Hello BPDUs in a switch's Root Port - to avoid having to wait for maxage to expire - resulting in faster convergence.






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






31. With RIP - the advertisement of a poisoned route out an interface - when that route was formerly not advertised out that interface due to split horizon rules.






32. An SPF calculation for which a router does not need to run SPF for any LSAs inside its area - but instead runs a very simple algorithm for changes to LSAs outside its own area.






33. A T1 alarm state that occurs when a device has detected a local LOF/LOS/AIS condition. The device in Red alarm state then sends a Yellow alarm signal.






34. Exterior Gateway Protocol.






35. An NTP mode in which two or more NTP servers mutually synchronize their clocks.






36. A message sent by a host when it wants to leave a group - addressed to the All Multicast Routers address 224.0.0.2.






37. A method of Link Fragmentation and Interleaving (LFI) over interfaces that natively use Frame Relay encapsulation. The routers first build MLP-style PPP headers - which are then encapsulated inside a Frame Relay header. The PPP headers are then used






38. With EIGRP - the timer used to determine when a neighboring router has failed - based on a router not receiving any EIGRP messages - including Hellos - in this timer period.






39. Generic routing encapsulation.






40. Time-division multiplexing.






41. Forward Explicit Congestion Notification.






42. Dynamic Multipoint VPN.






43. Operates in dense mode and depends on its own unicast routing protocol that is similar to RIP to perform its multicast functions.






44. The specific frequency subband on which the radio card or access point is operating. The RF channel is set in the access point or ad hoc stations.






45. In OSPF - a router that is prepared to take over the designated router.






46. Provider router.






47. The MPLS feature by which an ingress E-LSR copies the IP packet's IP TTL field into the MPLS header's TTL field.






48. The portion of PPP focused on negotiating IP features






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






50. A type of logic for how a router uses a default route. When a default route exists - and no more specific match is made between the destination of the packet and the routing table - the default route is used.