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CCIE Vocab

Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. The feature in a Cisco IOS device by which a terminal session's previously typed commands are remembered - allowing the user to recall the old commands to the command line through a simple key sequence (for example - the up-arrow key).






2. Differentiated Services.






3. 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.






4. Multilayer Switching.






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






6. A Cisco-proprietary feature. After a Cisco multicast router receives IGMP Join or Leave messages from hosts - it communicates to the connected Cisco switches - telling them which hosts (based on their unicast MAC addresses) have joined or left each m






7. Also known as triggered updates.






8. A term used with Cisco LAN switches - referring to a DSCP value used when making QoS decisions about a frame. This value may not be the actual DSCP value in the IP header encapsulated inside the frame.






9. Inside telcos' original TDM hierarchy - a unit that combines multiple DS1s into a single channel






10. Link-State Refresh. A timer that determines how often the originating router should reflood an LSA - even if no changes have occurred to the LSA.






11. Extensible Authentication Protocol.






12. A router that should either permanently or temporarily not be used as a transit router. Can wait a certain time after OSPF process start - or after BGP notifies OSPF that BGP has converged - before ceasing to be a stub router.






13. An optional transitive BGP path attribute that - for a summary route - lists the BGP RID and ASN of the router that created the summary.






14. The original standardized set of generic SNMP MIB variables - defined in RFC 1158.






15. On a single computer - one layer provides a service to a higher layer. The software or hardware that implements the higher layer requests that the next lower layer perform the needed function.






16. Carrier sense multiple access with collision detection. A media-access mechanism where devices ready to transmit data first check the channel for a carrier. If no carrier is sensed for a specific period of time - a device can transmit. If two devices






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






18. Dynamic Host Configuration Protocol.






19. Sent by a PIM router - by default every 30 seconds - on every interface on which PIM is configured to discover neighbors - establish adjacency - and maintain adjacency.






20. A term generally describing characteristics about BGP paths that are advertised in BGP Updates.






21. The characterization of how far EIGRP Query messages flow away from the router that first notices a failed route and goes active for a particular subnet.






22. 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






23. Defined in RFC 1293 - this protocol allows a Frame Relay-attached device to react to a received LMI "PVC up" message by announcing its Layer 3 addresses to the device on the other end of the PVC.






24. 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.






25. A type of spread spectrum that spreads RF signals over the frequency spectrum by transmitting the signal at different frequencies according to a hopping pattern. One of the original 802.11 physical layers used FHSS to offer data rates of 1 and 2 Mbps






26. A packet-scheduling algorithm used in Cisco switches that provides similar behavior to CBWFQ in shared mode and polices in shaped mode.






27. 64 bits at the end of an IPv6 global address - used to uniquely identify each host in a subnet.






28. 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.






29. Peak information rate.






30. Superframe






31. 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.






32. A 64-bit extension to the BGP NLRI field - used by MPLS for the purpose of making MPLS VPN customer routes unique in spite of the possibility of overlapping IPv4 address spaces in different customer networks.






33. Link-state database.






34. With OSPF - the OSPF router that wins an election amongst all current neighbors. The DR is responsible for flooding on the subnet - and for creating and flooding the type 2 LSA for the subnet.






35. The router that will receive the group traffic when a multicast router forwards group traffic to another router.






36. Rendezvous point.






37. A state for a route in an EIGRP topology table that indicates that the router believes that the route is stable - and it is not currently looking for any new routes to that subnet.






38. The 802.1X function implemented by a switch - in which the switch translates between EAPoL and RADIUS messages in both directions - and enables/disables ports based on the success/failure of authentication.






39. The difference between the measured signal power and the noise power that a particular receiver sees at a given time. Higher SNRs generally indicate better performance.






40. A standard (RFC 951) protocol by which a LAN-attached host can dynamically broadcast a request for a server to assign it an IP address - along with other configuration settings - including a subnet mask and default gateway IP address.






41. A Cisco IOS queuing tool most notable for its reservation of a minimum bandwidth for each queue.






42. Multicast Open Shortest Path First.






43. Used by WRED to calculate the rate at which the average queue depth changes as compared with the current queue depth. The larger the number - the slower the change in the average queue depth.






44. A VC that is set up dynamically when needed. An SVC can be equated to a dial-on-demand connection in concept.






45. In two-rate policing - the second and higher rate defined to the policer.






46. Extended Superframe.






47. The All OSPF Routers multicast IP address - listened for by all OSPF routers.






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






49. A commonly used name for Multi-VRF CE.






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







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