The GFP protocol has a high degree of standardization. It is a standard way for data services to be mapped to SDH/OTN. Which of the following features of the GFP protocol are correct? (multiple choice)

• A.It can more effectively prevent the error frame caused by the error code, and is more conducive to the interconnection of various manufacturers
• B.Support point-to-point or ring network service configuration
• C.Able to statistically multiplex user data signals
• D.GFP currently supports frame-mapped and transparent mapping (transparent)

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What is the wavelength of the OSC channel of Huawei OTN equipment? () (multiple choice)

• A.1550nm
• B.1565nm
• C.1510nm
• D.1491nm
• E.1511nm

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The following description of cluster management, the error is ()

• A.VVR must be started before the App, and then closed before the App
• B.VVR group: includes basic resources for VCS operation; ClusterService group: used for data replication control
• C.A resource group needs to be online only if all the resource groups it depends on are activated before it can go online; when a resource group is offline, the resource groups it depends on are all offline before it can be offline
• D.The nodes in the cluster have the same cluster ID

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There is a lower limit for the length of the Ethernet frame. What is the main reason for this?

• A.Conflict detection
• B.Carrier monitor
• C.Multi-point access
• D.Improve network bandwidth utilization

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What are the principles of synchronous Ethernet planning? (multiple choice)

• A.The internal clock source is recommended as the lowest level clock source
• B.When stopping the SSM protocol, do not configure the clock as a ring in this network. When starting the SSM protocol, the SSM protocol information of all network elements in the network must be set to be consistent
• C.When there is no BITS or other high-precision external clock equipment, it is recommended that the network element track the line clock source
• D.When there is BITS or other high-precision external clock equipment, it is recommended that the network element use the tracking external clock source

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