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CCIE Vocab

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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. 16 bits between the interface ID and global routing prefix in an IPv6 global address - used for subnet assignment inside an enterprise.

2. A technology that enables frequency reuse. Two variants exist: frequency hopping (FHSS) and direct sequence (DSSS). Both techniques spread the signal power over a relatively wide portion of the frequency spectrum over time - to reduce interference be

3. Prefix list.

4. Alarm Indication Signal. With T1s - the practice of sending all binary 1s on the line in reaction to problems - to provide signal transitions and allow recovery of synchronization and framing.

5. A local Cisco-proprietary BGP setting that is not advertised to any peers. A larger value is considered to be better.

6. An FRTS configuration construct - configured with the map-class frame-relay global configuration command.

7. The PDU used by a particular layer of a networking model - with x defining the layer.

8. With private VLANs - a secondary VLAN in which the ports can send and receive frames with each other - but not with ports in other secondary VLANS.

9. Point-to-Point Protocol.

10. 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.

11. Digital Signal Level 3.

12. A definition that determines the data structure and information implied by a particular LSA.

13. A neighbor state that signifies the other router has reached neighbor status - having passed the parameter check. The FIB entry details the information needed for forwarding: the next-hop router and the outgoing interface - in an optimized mtrie stru

14. Alternate Mark Inversion. A serial-line encoding standard that sends alternating positive and negative 3-volt signals for binary 1 - and no signal (0 V) for binary 0.

15. A BGP path attribute that is communicated throughout a single AS to signify which route of multiple possible routes is the best route to be taken when leaving that AS. A larger value is considered to be better.

16. An MPLS VPN term referring to an LSR that has no direct customer connections - meaning that the P router does not need any visibility into the VPN customer's IP address space.

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

18. Controls the distribution of multicast traffic by checking the TTL values configured on the interfaces. It forwards the multicast packet only on those interfaces whose configured TTL value is less than or equal to the TTL value of the multicast packe

19. 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.

20. A BGP neighbor state in which the BGP neighbors have stabilized and can exchange routing information using BGP Update messages.

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

22. Dynamic ARP Inspection.

23. Port Aggregation Protocol.

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

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

26. An architecture and set of documents that defines Cisco's best recommendations for how to secure a network.

27. Penultimate hop popping.

28. 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

29. The same thing as TCP code bits. See TCP code bits.

30. A protocol used for reliable multicast and unicast transmissions. Used by EIGRP.

31. A method of applying a mathematical formula - with input including a private key - the message contents - and sometimes a shared text string - with the resulting digest being included with the message. The sender and the receiver perform the same mat

32. A Cisco-proprietary protocol - used by LAN switches to communicate VLAN configuration.

33. The PPP function for fragmenting packets - plus interleaving delay-sensitive later-arriving packets between the fragments of the first packet.

34. IP Control Protocol.

35. An MPLS term referring to the first of several labels when an MPLS-forwarded packet has multiple labels (a label stack).

36. The speed at which the access link is clocked. This choice affects the price of the connection and many aspects of traffic shaping and policing - compression - quality of service - and other configuration options.

37. Cisco-proprietary STP feature in which a switch port monitors for STP BPDUs of any kind - err-disabling the port upon receipt of any BPDU.

38. The process of changing the electrical characteristics on a transmission medium - based on defined rules - to represent data.

39. 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.

40. A feature of Ethernet NICs. When the NIC transmits an electrical signal - it "loops" the transmitted electrical current back onto the receive pair. By doing so - if another NIC transmits a frame at the same time - the NIC can detect the overlapping r

41. Cisco-proprietary STP feature in which a switch port monitors for incoming superior Hellos - and reacts to a superior Hello to prevent any switch connected to that port from becoming root.

42. The protocol used in IPv6 for many functions - including address autoconfiguration - duplicate address detection - router - neighbor - and prefix discovery - neighbor address resolution - and parameter discovery.

43. Forward Explicit Congestion Notification.

44. Sent by a PIM router to its upstream router to either request that the upstream router forward the group traffic or stop forwarding the group traffic that is currently being forwarded. If a PIM router wants to start receiving the group traffic - it l

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

46. Advanced Encryption Standard A superior encryption mechanism that is part of the 802.11i standard and has much stronger security than TKIP.

47. For some encoding schemes - consecutive signals must use opposite polarity in an effort to reduce DC current. A BPV occurs when consecutive signals are of the same polarity.

48. Sequence number.

49. The second most significant bit in the most significant byte of an Ethernet MAC address - a value of binary 0 implies that the address is a Universally Administered Address (UAA) (also known as Burned-In Address [BIA]) - and a value of binary 1 impli

50. Defined in IEEE 802.1w - a specification to enhance the 802.1d standard to improve the speed of STP convergence.