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The diagram shows a campus with a L2 switched backbone. The backbone has a single VLAN (= subnet) with no loops. The links into the backbone are routed interfaces, not VLAN trunks. Switch X is the STP root of the core VLAN and switch Y is the standby root. The connection between X and Y is an EtherChannel. The network architect wants to add more redundancy by connecting the L3 switches in the distribution layer to both X and Y. What best describes that plan?

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The network shown supports Synchronous Status Messaging (SSM), which byte supplied by the ADM at
Site B in both directions in the section overhead is used for transporting SSM messages?

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In the OC-48 signal shown, when is the extinction ratio acceptable?

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Using the shown debugging excerpt, what option best describes the problem?

What type of effect on optical signals occurs when temperature fluctuations and bending stresses on fiber?

When discussing FCIP compression what should be addressed?

What is the difference in power at the input and the output of the device under test?

What is the frequency of an optical signal with a wavelength of 1530 nm?

How many DS-3s can be mapped to one STM-1 frame?

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