H31-321 Web TestEngine demo

Select all that apply.

• A

  Typically, services are protected using the pre-allocated resources between NEs, These resources cannot be shared on the entire network.

• B

  Generally, services are restored using any resource between NEs.

• C

  Generally, protection switching time is less than 50 ms. During service rerouting, service routes need to be re-calculated. Therefore, service restoration time is longer, and a service can be restored in seconds.

• D

  When the route of a service fails, the network automatically seeks a substitute route, and the service restoration algorithm is different from the route selection algorithm.

• E

  To enable the service restoration function on an ASON network, you need to reserve some idle resources for service rerouting. Services are restored in rerouting mode on an ASON network.