1. Which of the following damages can't be caused by a DDOS attack

A) DNS service down
B) physical server broken
C) military commander system down
D) web service down



2. In order to stop the service provided through a particular port in Windows OS, which of the following methods can be used to achieve this objective? (the number of correct answers: 3)(Select 3answers)

A) adjust firewall rule
B) update OS patch
C) stop the service itself
D) stop all guest role access
E) adjust local security policy


3. Which if the following keys in HTTP heads are related yo cache control? (the number of correct answers: 3)(Select 3answers)

A) date
B) cache-control
C) age
D) expires
E) host


4. For MySQL DB, if the records number exceeds one million in one single table, which of the following methods can help you improve querying speed? (the number of correct answers: 2)(Select 2answers)

A) use 'limit N' to limit the number of possible returned records
B) use 'count(*)' to get total record number before query
C) setup index for this table
D) use 'group by' to filter information



5. Which of following statement about 'Server Guard' Trojan scanning functionality is NOT correct?

A) Server Guard will delete any suspicious webshell file immediately
B) A change to a file in the web pages directories will trigger a scan for that file
C) Server Guard Agent will automatically scan your web pages directories and look for any webshell file.
D) you can log on to the Server Guard console to isolate webshell files with one click.