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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. In MPLS - a term used to define a label that an LSR allocates and then advertises to neighboring routers. The label is considered "local" on the router that allocates and advertises the label.






2. Receivers subscribe to an (S -G) channel when they request to join a multicast group. That is - they specify the unicast IP address of their multicast source and the group multicast address. SSM is typically used in very large multicast deployments s






3. A bit in the LAPF Frame Relay header that - when set to 1 - implies that the frame has experienced congestion.






4. A term used in this book to refer to a route that is included in a larger summary route.






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






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






7. The mandatory contention-based 802.11 access protocol that is also referred to as CSMA/CA.






8. The Frame Relay protocol used between a DCE and DTE to manage the connection. Signaling messages for SVCs - PVC Status messages - and keepalives are all LMI messages.






9. Exterior Gateway Protocol.






10. Network Address Translation.






11. Single-bit fields in the TCP header. For example - the TCP SYN and ACK code bits are used during connection establishment.






12. VTP process that prevents the flow of broadcasts and unknown unicast Ethernet frames in a VLAN from being sent to switches that have no ports in that VLAN.






13. A type of OSPF packet used to discover neighbors - check for parameter agreement - and monitor the health of another router.






14. With some routing protocols - the time period between successive Hello messages.






15. An EIGRP message that identifies neighbors - exchanges parameters - and is sent periodically as a keepalive function. Hellos do not require an Ack.






16. 64 bits at the end of an IPv6 global address - used to uniquely identify each host in a subnet.






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






18. Jargon used to refer to the second of two buckets in the dual token bucket model; its size is Be.






19. A T1 alarm state that occurs when a device receives a Yellow Alarm signal. This typically means that the device on the other end of the line is in a Red Alarm state.






20. A Cisco-proprietary messaging protocol used to negotiate the dynamic creation of PortChannels (EtherChannels) and to choose which ports can be placed into an EtherChannel.






21. Cisco IOS IP Service Level Agent feature. Provides for router-generated information useful for verifying network performance on a scheduled basis - and the associated reporting functions.






22. The Cisco IOS Router IP Traffic Export feature - intended for intrusion detection - exports IP traffic that has signs of an attack - such as duplicate IP packets simultaneously received on two or more of a router's interfaces.






23. A 3-bit field in the first 3 bits of the ToS byte in the IP header - used for QoS marking.






24. Peak information rate.






25. The definitions for a particular set of data variables - with those definitions following the SMI specifications. See also SMI.






26. 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.






27. The process of sending an infinite-metric route in routing updates when that route fails.






28. Message sent by a PIM-DM router to a downstream router when it receives a Graft message from the downstream router; sent using the unicast address of the downstream router.






29. An IEEE standard that - when used with EAP - provides user authentication before their connected switch port allows the device to fully use the LAN.






30. Slow Start Threshold.






31. An early standard from AT&T for encoding analog voice as a digital signal for transmission over a TDM network. PCM requires 64 kbps - and is the basis for the DS0 speed.






32. A Cisco IOS queuing tool most notable for its automatic classification of packets into separate per-flow queues.






33. 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






34. 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.






35. 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.






36. In shaping and policing - the definition of parameters that together imply the allowed rate and bursts.






37. Modular QoS CLI.






38. Auto-Rendezvous Point. Cisco-proprietary protocol that can be used to designate an RP and send RP-Announce messages that advertise its IP address and groups. Also - it can be used to designate a mapping agent that interprets what IP address RP is adv






39. Aka network layer reachability information.






40. An Internet standard authentication protocol that uses secure hashes and a three-way handshake to perform authentication over a PPP link.






41. Provides dynamic inspection of traffic as it traverses the router. It uses Context-Based Access Control (CBAC) to look deeper into a packet than an access list can. It tracks outbound traffic and dynamically allows in responses to that traffic.






42. Burst With shaping and policing - the number of additional bits that may be sent after a period of relative inactivity.






43. An STP timer that dictates the interval at which the Root switch generates and sends Hello BPDUs.






44. A method for how a TCP sender grows its calculated CWND variable - thereby growing the allowed window for the connection. Congestion Avoidance grows CWND linearly.






45. Measured Round-Trip Time.






46. 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






47. A 16-bit number set with a router config-register command. It is used to set several low-level features related mainly to accessing the router and what the router does when powered on.






48. A multicast routing protocol that operates in dense mode and depends on the OSPF unicast routing protocol to perform its multicast functions.






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






50. 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.