1. Which of the following options does not belong to 5 key elements of network communication?

A) Encryption Algorism
B) Source IP
C) Destination IP
D) Communication Protocol



2. What design flaw of TCP/IP protocol does SYN flood attack use?

A) UDP stateless connection
B) DNS 3 times hands shake
C) TCP 3 times hands shake
D) HTTP plain text transmission



3. Customer who bought ECS server doesn't need to worry about :

A) Cloud infrastructure security
B) OS vulnerability inside ECS
C) Web service security inside ECS
D) ECS security group setting



4. Using ECS security group can help you achieve:

A) better CPU usage
B) fine grained access control to you server
C) enlarge your network bandwidth
D) apply QOS to a specific IP



5. Which of the following functions can be provided by Alibaba Cloud Server Guard product? (the number of correct answers: 3)(Select 3answers)

A) brute Force password hacking detection and defense
B) suspicious remote login detection and warning
C) security vulnerability scanning and patching
D) anti-ddos
E) anti SQL injection