A.The length of time left for the backup system to back up

B.BM:BACkup WinDow

C.RPO:ReCovery Point OBjeCtive

D.Describes the "maximum amount of data loss that can be tolerated" and the system data is restored to a previous point in time (there is data loss).

A.False

B.True

A.GSM-R new networks must bundle network premium services

B.GSM-R Centralized Network Optimization and GSM-R Expert Support Optimization Services are expanded by collecting existing network issues and network assessment models

C.Customers have purchased maintenance services and do not need to purchase online preferential services

D.GSM-R Optimization Services and Planning and Design Services are sold in packages and cannot be split

A.Inspections are carried out prior to the guarantee service

B.On-site spare parts guarantee (optional service).

C.Submit a service summary report

D.On-site experts are on duty

E.Emergency plan preparation

A.Building-style data room

B.Modular data room

C.Container data room