Chapter Review Answers

  1. Answer: C,D. J-Flow v10 and IPFIX are synonymous. Trio supports both.

  2. Answer: B,D. As of Junos 11.4, Trio only supports 1:1 SNAT, DNAT, and Twice NAT.

  3. Answer: A. The next-hop style service set creates an inside and outside service interface that can be used to bridge routing instances.

  4. Answer: A,D. The interfaces included in Trio tunnel services are gr-, ip-, lt-, mt-, pd-, pe-, ut-, and vt-.

  5. Answer: C. Logical tunnels require that two IFLs that are to be joined use the peer-unit to reference the other. For example, lt-0/0/0.0 would use a peer-unit of 1, whereas lt-0/0/0.1 would use a peer-unit of 0.

  6. Answer: B. Only two port mirroring instances can be associated to a single FPC.

  7. Answer: C. The sampling formula is packets sampled = (run-length + 1) / rate. With a rate of 10 and run-length of 3, this would be packets sampled = (3 + 1) / 10. Otherwise written as 0.40 = 4 /10.

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