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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. PIM-SM is a method of routing multicast packets that requires some intelligence in the network about the locations of receivers so that multicast traffic is not flooded into areas with no receivers. PIM Sparse Mode gets its name from the assumption t






2. Version 6 of the IP protocol - which uses 128-bit IP addresses.






3. 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.






4. Differentiated Services.






5. Backup designated router.






6. A Cisco IOS feature that performs deep packet inspection to classify packets based on application layer information.






7. Bootstrap Router.






8. Policing in which a single rate is metered - and packets are placed into one of two categories (conform or exceed).






9. The process of breaking a frame into pieces - sending some of the fragments - and then sending all or part of a different packet - all of which is done to reduce the delay of the second packet.






10. Reported distance or Route Distinguisher.






11. Network Control Protocol.






12. 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.






13. The most significant bit in the most significant byte of an Ethernet MAC address - its value implies that the address is a unicast MAC address (binary 0) or not (binary 1).






14. 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.






15. A bit inside the Frame Relay header that - when set - implies that congestion occurred in the direction opposite (or backward) as compared with the direction of the frame.






16. Web Cache Communication Protocol.






17. An OSPF external route for which internal OSPF cost is not added to the cost of the route as it was redistributed into OSPF.






18. Defined in IEEE 802.1s - a specification for multiple STP instances when using 802.1Q trunks






19. The portion of PPP focused on supporting the CDP protocol.






20. A router that should not be used to forward packets between other routers. Other routers will not send Query messages to a stub router.






21. A conceptual model used by shapers and policers to represent their internal logic.






22. A Cisco-proprietary Layer 2 protocol that enables a router to communicate to a switch which multicast group traffic the router does and does not want to receive from the switch.






23. With RIP - the regular interval at which updates are sent. Each interface uses an independent timer - defaulting to 30 seconds.






24. 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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25. A method for how a TCP sender grows its calculated CWND variable - thereby growing the allowed window for the connection. Slow Start grows CWND at an exponential rate.






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






27. Message sent by a PIM-DM router to its upstream router asking to quickly restart forwarding the group traffic; sent using the unicast address of the upstream router.






28. 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.






29. Per-Hop Behavior.






30. A serial-line encoding standard that substitutes Bipolar Violations in a string of eight binary 0s to provide enough signal transitions to maintain synchronization.






31. 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.






32. Finish time.






33. Prefix list.






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






35. Internet Group Management Protocol.






36. In PIM-SM - the path of the group traffic that flows from the RP to the routers that need the traffic. It is also called the root-path tree (RPT) - because it is rooted at the RP.






37. On a serial cable - the pin lead set by the DCE to imply a working link.






38. The process of installing a multicast application; also referred to as launching an application.






39. Access Control Server. A term referring generically to a server that performs many AAA functions. It also refers to the software product Cisco Secure Access Control Server.






40. A term referring to the processes and bits in the data stream used to manage the Telco TDM hierarchy.






41. 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.






42. A process whereby a switch - when making a forwarding decision - uses not only Layer 2 logic but other OSI layer equivalents as well.






43. A method of collecting traffic received on a switch port or a VLAN and sending it to specific destination ports on a switch other than the one on which it was received.






44. A workstation or server configured to collect and present RMON data for reporting purposes.






45. With EIGRP - a purposefully slowly changing measurement of round-trip time between neighbors - from which the EIGRP RTO is calculated.






46. A logical group of content engines running WCCP between them. The lead content engine determines the traffic distribution within the cluster - for optimum performance and scalability.






47. 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






48. Weighted tail drop.






49. Router Advertisement.






50. Measured Round-Trip Time.