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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. An IOS feature in which multiple routing tables and routing forwarding instances exist in a single router - with interfaces being assigned to one of the several VRFs. This feature allows separating of routing domains inside a single router platform.






3. Another name for 802.1Q-in-Q. See 802.1Q-in-Q.






4. 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






5. Multiple Spanning Trees.






6. A neighbor state that signifies the other router has reached neighbor status - having passed the parameter check.






7. Version 4 of the IP protocol - which is the generally deployed version worldwide (at publication) - and uses 32-bit IP addresses.






8. The MD5-encoded password defined by the enable secret command.






9. An alternative software loaded into a Cisco router - used for basic IP connectivity; most useful when Flash memory is broken and you need IP connectivity to copy a new IOS image into Flash memory.






10. Orthogonal frequency division multiplexing.






11. A set of parameters for CBAC to perform in its traffic inspection process.






12. A Cisco-proprietary STP implementation - created many years before IEEE 802.1s and 802.1w - that speeds convergence and allows for one STP instance for each VLAN.






13. Bootstrap Router.






14. Flush timer.






15. Jargon referring to any queue that receives priority service - often used for queues in an LLQ configuration that have the priority command configured.






16. 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.






17. An 802.11 frame that access points or stations in ad hoc networks send periodically so that wireless stations can discover the presence of a wireless LAN and coordinate use of certain protocols - such as power-save mode.






18. A type of AS_PATH segment consisting of an unordered list of ASNs consolidated from component subnets of a summary BGP route.






19. An enhanced version of T1 framing - as compared with the earlier Superframe (D4) standard.






20. 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.






21. A list of interspersed alphanumeric literals and metacharacters that are used to apply complex matching logic to alphanumeric strings. Often used for matching AS_PATHs in Cisco routers.






22. The number of beacons that governs how often multicast frames are sent over a wireless LAN.






23. A BGP router that - unknown to it - is aided by a route reflector server to cause all iBGP routers in an AS to learn all eBGP-learned prefixes.






24. WRED is a method of congestion avoidance that works by dropping packets before the output queue becomes completely full. WRED can base its dropping behavior on IP Precedence or DSCP values to drop low-priority packets before high-priority packets.






25. In IPv6 - an address used in the Neighbor Discovery (ND) process. The format for these addresses is FF02::1:FF00:0000/104 - and each IPv6 host must join the corresponding group for each of its unicast and anycast addresses.






26. Challenge Handshake Authentication Protocol.






27. An IPv6/IPv4 tunneling method that allows isolated IPv6 domains to be connected over an IPv4 network.






28. Sequence number.






29. A standards-based way of helping routers find Rendezvous Points (RP). RPs notify BSRs of the groups they handle. BSRs in turn flood the group-to-RP mappings throughout the network. Each router individually determines which RP to use for a particular






30. The process of combining multiple synchronized input signals over a single medium by giving each signal its own time slot - and then breaking out those signals.






31. Enables a wireless client to securely roam between access points in the same subnet or between subnets with access point handoff times within 50 ms.






32. 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.






33. Weighted tail drop.






34. 64 bits at the end of an IPv6 global address - used to uniquely identify each host in a subnet.






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






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






37. The process of forwarding packets through a router. Also called IP forwarding.






38. A group of devices on one or more LANs that are configured (using management software) so that they can communicate as if they were attached to the same wire - when - in fact - they are located on a number of different LAN segments. Because VLANs are






39. Slow Start Threshold.






40. 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.






41. A BGP path attribute that lists the next-hop IP address used to reach an NLRI.






42. An 802.1w RSTP port state in which the port is not forwarding or receiving; covers 802.1d port states disabled - blocking - and listening.






43. 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.






44. Edge LSR.






45. An EIGRP router's reaction to an input event - leading to the use of a feasible successor or going active on a route.






46. Not-so-stubby area.






47. An issue whereby parts of the RF signal take different paths from the source to the destination - which causes direct and reflected signals to reach the receiver at different times - and corresponding bit errors.






48. Ethernet MAC address that represents a single NIC or interface.






49. The most recent standardized set of generic SNMP MIB variables - defined in RFC 1213 and updated in RFCs 2011 through 2013.






50. A process used in routers that are encrypting traffic to permit egress QoS actions to be taken on traffic that is being encrypted on that router. QoS pre-classification keeps a copy of each packet to be encrypted in memory long enough to take the app