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QUESTION 34
If you need to accelerate a certain domain name (such as abc.com) via Alibaba Cloud Content Delivery Network (CDN), you must add it to “CDN Domain Name List” in the CDN service. After added successfully, you will get a CNAME address A Next, you need to modify domain name resolution and direct the domain name (such as abc.com) to CNAME address A. Which of the following is a NOT correct description of modifying domain name resolution?

QUESTION 35
Different Alibaba Cloud VPCs are completely isolated from each other.
By default, the VPCs cannot communicate with each other over Intranet, but you can establish VPN connections via the Internet to achieve interconnection between VPCs.

QUESTION 36
When using Alibaba Cloud SLB to forward layer 7 (HTTP) service requests. SLB will replace the IP address in the HTTP header file to forward requests.
Therefore the source IP address that can be seen on the backend ECS instance is the IP address of SLB instead of the clients real IP address.

QUESTION 37
By using ApsaraDB for RDS to implement read/write splitting, which of the following can be achieved? (Number of correct answers 2)

QUESTION 38
Many websites have suffered DDoS attacks of different volumes. Therefore, accurate understanding of DDoS attacks is critical to website security protection. Which of the following statements about DDoS attacks is the MOST accurate?

QUESTION 39
RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.

QUESTION 40
Alibaba Cloud Object Storage Service (OSS) is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. In an OSS bucket, all elements are stored as________.

QUESTION 41
SQL injection is a common attack on the application layer. It builds special input as a parameter to pass into a web application to steal or destroy the application data. Which of the following is the target that SQL injection eventually destroys or steals from?

QUESTION 42
Which of the following Alibaba Cloud products can provide Anti-DDoS service? (Choose two.)

QUESTION 43
Which of the following scenarios can be done using Alibaba Cloud Express Connection? (Number of correct answers: 2)

QUESTION 44
There are scheduled tasks and event-triggered tasks in Auto Scaling. Regarding event-triggered tasks, which of the following metrics are supported for this type of task? (Choose four.)

QUESTION 45
Which of the following privilege is required to manually install Alibaba Clod Security Center on the server?

QUESTION 46
In Auto Scaling, a scaling group refers to the collection of ECS instances deployed with the same applications, where these ECS instances can be charged by monthly subscription or Pay-As-You-Go. For scenarios with abrupt service traffic change, Pay-As-You-Go ECS instances can meet service requirements while minimizing cost. For monthly subscription ECS instances, you can manually add the idle instances to the scaling group to take full advantage of idle resources.

QUESTION 47
To meet business requirements, a user requires that the backend server of an SLB instance include a primary ECS instance and a secondary ECS instance. When the primary instance is working properly, the traffic is only forwarded to the primary ECS, when the primary instance is down, traffic is switched to the standby instance. In this case, you can create an active/standby server group on the backend of the SLB instance Which kind of listener supports this feature? (Number of correct answers: 2)

QUESTION 48
Which of the following statements about file uploading to OSS is NOT correct?

QUESTION 49
Alibaba Cloud Content Delivery Network (CDN) is a distributed network built on top of a base network with edge node server clusters distributed across various regions. If a user finds that the CDN cache hit rate is low, the possible reasons are ____________. (Choose three.)

QUESTION 50
Many of Alibaba Cloud services provide highly reliable data storage capacity. For example, Object Storage Service (OSS) promises that its data reliability is no less than 99 99999999%. This high data reliability is solely achieved by RAID 0+1 redundancy technology.

QUESTION 51
Alibaba Cloud ECS provides multiple instance types to meet the needs of different business scenarios. A medium-sized enterprise user wants to use two ECS instances, one to deploy a single Tomcat service and the other one to deploy Memcache. Which of the following configurations is most recommended?

QUESTION 52
When creating a scaling group in Auto Scaling, there is one setting called “Removal policy.” Which of the following statements is true if the removal policy is set to “the earliest instance with the scaling configuration”?

QUESTION 53
Alibaba Cloud Object Storage Service (OSS) provides multiple file uploading modes for different scenarios, which are___________.
(Number of correct answers: 2)

QUESTION 54
Recently, response speed of a certain Alibaba Cloud Elastic Compute Service (ECS) instance is unacceptably slow. By using CloudMonitor we discovered that the ECS instance utilizes more than 80% of the assigned bandwidth.
Which of the following approach can address this issue and without the need to reboot the ECS instance?

QUESTION 55
Object Storage Service (OSS) supports sub accounts, and you can allocate access permissions to different buckets for each sub account.

QUESTION 56
In an Alibaba Cloud Elastic Compute Service (ECS) instance, you can freely change directory permissions of the system root directory in Linux, which has no influence on all services in the Elastic Compute Service (ECS) instance.