Which of the following network optimization techniques would be MOST appropriate far more efficient delivery of frequently accessed websites?

A company uses its own private cloud, which has few available resources. Mission-critical systems and other information systems are running on it. A new system will be deployed on the private cloud. The following tests are included in the test plan:
Load test (2h)
Backup/restore test (6h)
Functional test (8h)
Failover test (1h)
The work schedule of the existing system is shown below.

To minimize the effect to the existing system, which of the following schedules is MOST suitable for the load test?

A technician needs to configure a virtual NIC on a Class A IP address network. Which of the following is the default subnet mask for this network?

Users at a university are experiencing slow response and performance issues with private cloud services. The university was compromised, and a loss of bandwidth utilization was reported.
Without deploying new software, which of the following should be performed to determine the cause of the issues?

A technician has just installed a key-value store on a server and is unable to connect it to the application using port 8291. The technician logged on to the server and needs to determine if the port is listening. Which of the following tools should the technician use?