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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. A small FIFO queue associated with each router's physical interface - for the purpose of making packets available to the interface hardware - removing the need for a CPU interrupt to start sending the next packet out the interface.






2. A BGP router that forwards iBGP-learned routes to other iBGP routers.






3. In shaping and policing - commonly used to refer to the shaping or policing rate. For WAN services - a common reference to the bit rate defined in the WAN service business contract for each VC.






4. A switch feature in which the switch examines DHCP messages and - for untrusted ports - filters all messages typically sent by servers and inappropriate messages sent by clients. It also builds a DHCP snooping binding table that is used by DAI and IP






5. Protects against problems caused by unidirectional links between two switches. Watches for loss of received Hello BPDUs - in which case it transitions to a loop-inconsistent state instead of transitioning to a forwarding state.






6. A TCP variable that defines the largest number of bytes allowed in a TCP segment's Data field. The calculation does not include the TCP header. With a typical IP MTU of 1500 bytes - the resulting default MSS would be 1460. TCP hosts must support an M






7. A 3-tuple consisting of an IP address - port number - and transport layer protocol. TCP connections exist between a pair of sockets.






8. Switched virtual circuit.






9. A prestandard (at the time of publication) wireless LAN physical layer that offers data rates in the hundreds of megabits per second.






10. The two computers use a protocol with which to communicate with the same layer on another computer. The protocol defined by each layer uses a header that is transmitted between the computers to communicate what each computer wants to do.






11. 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.






12. Dynamic Host Configuration Protocol.






13. 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






14. EAP over LAN.






15. Sequence number.






16. A method of Link Fragmentation and Interleaving (LFI) over interfaces that natively use Frame Relay encapsulation. The routers first build MLP-style PPP headers - which are then encapsulated inside a Frame Relay header. The PPP headers are then used






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






18. With PIM on a multiaccess network - the PIM router with the highest IP address on the subnet. It is also the IGMPv1 Querier. The DR is responsible for the following tasks: - Sending PIM register and PIM join and prune messages toward the RP to infor






19. Inside telcos' original TDM hierarchy - the smallest unit of transmission at 64 kbps.






20. Backup designated router.






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






22. An individual line in an ACL.






23. With EIGRP - the route to each destination for which the metric is the lowest of all known routes to that network.






24. A component of the IOS IP SLA feature. An IP SLA responder is a router configured to respond to a particular IP SLA message initiated by another router - allowing the routers to work together to provide performance information including UDP jitter an






25. The combination of MPLS labels and links over which a packet will be forwarded over an MPLS network - from the point of ingress to the MPLS network to the point of egress.






26. A T1 alarm state that occurs when the receiver can no longer consistently identify the frame.






27. 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.






28. Superframe






29. Link Fragmentation and Interleaving.






30. An IPv6 address format used for publicly registered IPv6 addresses.






31. Sending a message from a single source or multiple sources to selected multiple destinations across a Layer 3 network in one data stream.






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






33. The encapsulation of EAP messages directly inside LAN frames. This encapsulation is used between the supplicant and the authenticator.






34. Boot Protocol. 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.






35. An Internet standard authentication protocol that uses clear-text passwords and a two-way handshake to perform authentication over a PPP link.






36. In the PIM-SM design - the central distribution point to which the multicast traffic is first delivered from the source designated router.






37. WRED compares this setting to the average queue depth to decide whether packets should be discarded. No packets are discarded if the average queue depth falls below this minimum threshold.






38. Low-latency queuing.






39. The portion of PPP focused on negotiating IP features






40. Operation - Administration - and Maintenance.






41. Ready To Send.






42. A route that is used for forwarding packets when the packet does not match any more specific routes in the IP routing table.






43. Exterior Gateway Protocol.






44. Used by a policer to classify packets relative to the traffic contract. These packets are considered to be above the traffic contract in all cases.






45. An MQC configuration style by which one policy map calls a second policy map. For example - a shaping policy map can call an LLQ policy map to implement LLQ for packets shaped by CB Shaping.






46. 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.






47. Type of Service byte.






48. An MPLS VPN term referring to any LSR that connects to customers to support the forwarding of unlabeled packets - as well as connecting to the MPLS network to support labeled packets - thereby making the LSR be on the edge between the provider and th






49. Neighbor Discovery Protocol.






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







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