Online Access Free 4A0-205 Exam Questions

What is the function of the express channel interface?

• A.It drops high capacity channels in the local node.
• B.It enables the high speed route for all channels terminated in the local node.
• C.It passes all the channels not terminated in the local node through the downstream node.
• D.It enables the high speed route for all channels passing through that interface.

What is an optical switch?

• A.A device that converts optical signal to electrical to allow switching through the electrical matrix, and then again to optical towards the next card (and versa).
• B.A device that selectively transfers an optical signal from one port to another.
• C.A device that groups multiple lambdas in one multiplexed signal.
• D.A device that selectively transfers an optical ODU frame from one port to another.

How can a mesh network be upgraded so that more services can be transported?

• A.Upgrading link capacity and/or installing new links provides more bandwidth to the existing mesh network.
• B.Configuring new WSS cards is the most effective way to give flexibility and network bandwidth to an existing mesh network.
• C.The Protection and Restoration Combined (PRC) mechanism can enable more bandwidth but only for the protected services.
• D.Upgrading the network to coherent transmission is the only effective way to enable more bandwidth to the existing mesh network.

Which of the following are the main reasons for fiber attenuation?

• A.Scattering and absorption
• B.Chromatic dispersion (CD) and polarization mode dispersion
• C.Small channel spacing
• D.Refraction and reflection

Which of the following is an example of optical protection mechanism?

• A.Optical regeneration (e.g., back-to-back regeneration)
• B.GR and SBR combined
• C.GMPLS-enabled SBR
• D.OSNCP (e.g., via Y-cable or OPS card)