急!求教backup计算题，多谢了！# Security - 系统安全
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A company has the following IT characteristics:
Item Quantity Capacity
Server 8 200 GB / server
Workstations 75 40 GB / workstation
Laptops 25 8 GB / laptop
Tape Drive 1 Holds one 32 GB tape
The company wants to institute a new backup policy, with full backups done
over the weekend (Friday 8pm to Monday, 6am). It takes 2 minutes to swap a
new tape into the Tape Drive. For reliability, a 100-byte ACK packet is sent
back from the Tape Drive for every two received packets (sent from a server
, workstation, or laptop). All packets sent to the Tape Drive are 1000 bytes
long. The company's network looks like this:
l. Is there enough time to do the full backup over the weekend? Show your
exact calculations.
2. How many tapes are required?
Item Quantity Capacity
Server 8 200 GB / server
Workstations 75 40 GB / workstation
Laptops 25 8 GB / laptop
Tape Drive 1 Holds one 32 GB tape
The company wants to institute a new backup policy, with full backups done
over the weekend (Friday 8pm to Monday, 6am). It takes 2 minutes to swap a
new tape into the Tape Drive. For reliability, a 100-byte ACK packet is sent
back from the Tape Drive for every two received packets (sent from a server
, workstation, or laptop). All packets sent to the Tape Drive are 1000 bytes
long. The company's network looks like this:
l. Is there enough time to do the full backup over the weekend? Show your
exact calculations.
2. How many tapes are required?