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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. An OSPF external route for which internal OSPF cost is added to the cost of the route as it was redistributed into OSPF.






2. Slow Start Threshold.






3. Pulse code modulation.






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






5. A logical concept that represents the path over which frames travel between DTEs. VCs are particularly useful when comparing Frame Relay to leased physical circuits.






6. The protocol used by content engines to manage traffic flow between routers configured for WCCP and between content engines. WCCP takes advantage of the fact that many web pages (and other content) are regularly accessed by users in a given network.






7. 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.






8. 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.






9. Designed to solve the problems of multicast duplication and multicast routing loops. For every multicast packet received - a multicast router examines its source IP address - consults its unicast routing table - determines which interface it would us






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






11. Backup designated router.






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






13. WRED compares this setting to the average queue depth to decide whether packets should be discarded. All packets are discarded if the average queue depth rises above this maximum threshold.






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






15. Refers to how a router views a BGP peer relationship - in which the peer is in the same AS.






16. A Cisco-proprietary feature by which multiple routers can provide interface IP address redundancy so that hosts using the shared - virtual IP address as their default gateway can still reach the rest of a network even if one or more routers fail.






17. A single address in each subnet for which packets sent to this address will be broadcast to all hosts in the subnet. It is the highest numeric value in the range of IP addresses implied by a subnet number and prefix/mask.






18. Neighbor Solicitation.






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






20. 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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21. A characterization of a network attack in which packets flow to the attacker - and then out to the true recipient. As a result - the user continues to send data - increasing the chance that the attacker learns more and better information.






22. A BGP router in an AS that uses route reflectors - but that is not aided by any RR server.






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






24. 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.






25. 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.






26. In SNMP - the process of a manager using successive GetNext and GetBulk commands to discover the exact MIB structure supported by an SNMP agent. The process involves the manager asking for each successive MIB leaf variable.






27. Time to Live.






28. Modified Deficit Round-Robin.






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






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






31. A contiguous group of data links that share the same OSPF area number.






32. CDP Control Protocol.






33. A wireless LAN physical layer that operates at up to 11-Mbps data rates using DSSS in the 2.4-GHz band.






34. A characteristic of OSPF interfaces that determines whether a DR election is attempted - whether or not neighbors must be statically configured - and the default Hello and Dead timer settings.






35. A bit in the ATM cell header that - when set to 1 - means that if a device needs to discard frames - it should discard the frames with DE 1 first.






36. 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






37. A term referring to the MQC class-map command and its related subcommands - which are used for classifying packets.






38. The Cisco IOS feature by which special short key sequences can be used to move the cursor inside the current command line to more easily change a command.






39. An IP variable that defines the largest size allowed in an IP packet - including the IP header. IP hosts must support an MTU of at least 576 bytes.






40. Inter-Switch Link.






41. A Cisco switch feature that permits limiting traffic arriving at switch ports by percentage or absolute bandwidth. Separate thresholds are available per port for unicast - multicast - and broadcast traffic.






42. VLAN Trunking Protocol.






43. Timer An STP timer that dictates how long a port should stay in the listening state and the learning state.






44. An OSPF timer that determines how long an LSA can remain in the LSDB without having heard a reflooded copy of the LSA.






45. Tag Distribution Protocol.






46. The content engine in a WCCP cluster - which determines how traffic will be distributed within the cluster.






47. With private VLANs - a secondary VLAN in which the ports can send and receive frames only with promiscuous ports in the primary VLAN.






48. An 802.1w RSTP port state in which the port is an alternative Designated Port on some LAN segment.






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






50. 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.







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