1. Which protocol is a 'data link' layer protocol in ISO/OSI 7 layer network model?

A) ARP
B) ICMP
C) FTP
D) UDP



2. Which command in RedHat Linux shell can be used to check disk usage?

A) df
B) diskSpace
C) diskUsage
D) ls



3. Which of the following statements about WAF data risk control feature is NOT true?

A) WAF need to inject JavaScript piece into all pages under the same protected domain name to decide if the client side is worth to trust
B) this feature is not suitable for scenario needs to call API directly
C) this feature can only used for single page, can't be used to protect the whole domain name
D) direct access URL protected by this feature will have slider verification pop out



4. What is the correct action sequence of WAF protection strategy: (1) CC detection (2) Web application attack detection(3) Access control

A) 213
B) 231
C) 132
D) 312



5. What are the advantages of anti-DDOS pro comparing to anti-DDOS basics service? (the number of correct answers: 3)(Select 3answers)

A) can do anti-fraud protection
B) stronger defending attacks capability
C) no upper limit to the attack traffic need to be handled
D) elastic protection bandwidth
E) can protect IDC outside Alibaba Cloud