Cisco CCIE Service Provider Optical Recertification Set 6

1.

In a Distance Vector protocol, "counting to infinity":

Calculates the time taken for a protocol to converge Checks to make sure the number of route entries do not exceed a set upper limit Counts the packets dropped during a routing loop Sets an upper limit for hop count, so that routing loops can be broken if this limit is reached Causes the router to enter an infinite loop and requires the router to be restarted

2.

What is the power at the output ports of a 90%-10% Tee coupler that has an 80 m W light source and 1 dB of excess loss?

57.2 m W and 6.3 m W 72 m W and 8 m W 90.6 m W 10.2 m W 60.3 m W 3.2 m W

3.

What is NOT a good rule-of-thumb when designing the placement of Erbium Doped Fiber Amplifiers (EDFA) in a ring?

Try to space the EDFAs evenly between transmitter and receiver Use a low noise, low gain EDFA for a pre-amp situation Use a high gain, high noise EDFA for a pre-amp situation For a 32 lambda system, try to avoid getting below -21 dBm input power for any lambda coming into anEDFA

4.

Which statements are true regarding port channeling?

A loss of one port in the channel will not cause FSPF (Fabric Shortest Path First) protocol to re-converge, therefore no fabric disruption will occur. Port Channeling has no master port and does not fail the whole channel on a loss of one port in thechannel. A master port is defined to allow that port to determine which path a frame should take through the channel. Cisco's port channel feature allows only 4 ports to be aggregated per line card.

5.

The TCP PUSH flag indicates:

The data in the TCP receive buffer should be sent to the application listening to this TCP connection
without waiting for further data. Any data being buffered by routers between the source and destination for this connection should be sentimmediately. The sender should make certain its send buffer is pushed onto the wire. This session is about to end.

6.

What part of the SONET frame can be used to identify and locate trouble between regenerators?

Path Overhead Section Overhead Line Overhead Information Payload

7.

In R4.1 of the 15454, the ML-series Ethernet cards provide QoS enhancements that allow Service Providers to deliver CIR/PIR (Committed Information Rate/Peak Information Rate) type SLA's. Which two specific QoS mechanisms were added to accomplish this?

Weighted Deficit Round Robin Scheduling (WDRR) Tri-color policer Discard Eligible Tail Drop Mechanism Low Latency Queuing (LLQ)

8.

What are thin-film filters (TFF) a form of?

In-fiber Bragg grating Dielectric filter Array wave guide grating Prism grating

9.

Why does SNR decrease as the signal progresses through the DWDM system?

Noise is easier to amplify Stimulated emissions cannot be eliminated Noise increases through each amplification stage Dispersion adds greater noise Inherent attenuation properties of fiber

10.

To set the SONET overhead bytes in the frame header to meet a specific standards requirement or to ensure interoperability with another vendor's equipment, use what configuration command line?

pos flag in the global pos flag in the interface pos flag-type in the global pos flag-type in the interface

Cisco CCIE Service Provider Optical Recertification Set 6

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Cisco CCIE Service Provider Optical Recertification Set 6

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