Cisco CCIE Service Provider Optical Recertification

1.

In order to avoid loops when sending routing updates, what is the correct technique to prevent a network from being forwarded on the same interface it is learned?

Poison Reverse The use of access-lists used with distribute-list Split Horizon This is not a problem, since this cannot happen.

2.

ML-series QoS handling of multicast and broadcast traffic involves:

Putting all multicast and broadcast traffic in its own queue and giving it priority over other traffic. Putting multicast and broadcast traffic in its own queue and allocating a 10% port bandwidth guarantee. Configuration using the "bandwidth" command allowing QoS guarantees for multicast and broadcast traffic. All multicast and broadcast being treated as best effort (BE) traffic.

3.

What is an active filter?

Prisms Dielectric thin film interface filter Diffraction grating Semi-conductor filter Bragg Grating

4.

For SONET Ring switching, the 50ms switch time applies to:

50 ms, not including detection time For rings smaller than 100km For rings smaller than 2000km Up to 64 nodes Up to 254 nodes

5.

What feature of the spatial reuse protocol used in DPT allows for bandwidth reuse on the ring?

Fairness algorithm Token controlled access Packet destination stripping Automatic topology discovery Multicast origination stripping

6.

What part of the SONET frame is used to overcome the need to buffer information in order to have fixed information payloads?

Section Overhead Line Overhead Pointers Path Overhead H2 and STS-1

7.

The total capacity of a 2F MS-SPRing network of N nodes operating as MS-SPRing nodes operating at a ring speed of STM-4 in VC4 units is: (NOTE: PT=Pass Through traffic)

2 x N - PT 4 x N - PT 8 x N - PT Depends on the traffic pattern

8.

In Fiber optic communication systems, a pulse is said to be chirped if its carrier frequency changes with:

Distance Time Group Delay Velocity Wavelength

9.

With CGMP enabled, which are unique about the following MAC address range: 01-00-5E-00-00-00 to 01-00- 5E-00-00-FF? (multiple answer)

CGMP does not prune those MAC addresses. They contain the CGMP Multicast addresses for the IGMP Leaves and IGMP Queries. CGMP filters those MAC addresses when they arrive at the processor They are the reserved IP addresses of 224.0.0.0 to 224.0.0.255 for forwarding local IP multicast traffic in asingle Layer 3 hop.

10.

What is NOT a characteristic of Direct attached Storage (DAS)?

High speed Low latency Limited distance Re-routable protection

Cisco CCIE Service Provider Optical Recertification

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