11.a. The total loss in a fiber link is 7.1 dB, the design margin is 1 dB, and the optical budget in the link is  10.4 dB. What's the remaining margin in this link? A. –2.3 dB B. 7.1 dB C. 9.4 dB D. 2.3 dB 11.b. A fiber link has a polarization mode dispersion of 4.2 ps/√km. The fiber link is 5 km. What's the total  polarization mode dispersion in this fiber? A. 1.9 ps B. 9.4 ps C. 0.84 ps D. 21 ps

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