Which of the following statements is correct?

When using Alibaba Cloud SLB, you can set different weights for backend ECS instances. The higher the weight of a backend ECS instance, the more load will be assigned to it. If an SLB instance has 5 ECS instances in the backend server pool, all of which are healthy. Among these 5 ECS instances, the weight of ecs_inst1 is set to 100.

Which of the following statements is correct?
A . We do not know the weight settings of the remaining 4 ECS instances, so we cannot tell what would happen.
B. 100% of loads will be assigned to ecs_inst1, and the rest 4 ECS instances will stay idle.
C. Based on SLB’s working mechanism, approximately 20% of loads will be assigned to ecs_inst1.
D. Based on request level parameters of external requests, all requests with a request level parameter of 100 will be transferred to ecs_inst1.

Answer: A

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.

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.
A . TRUE
B. FALSE

Answer: B

Explanation:

Reference: https://apsarastackdocument.oss-cn-hangzhou.aliyuncs.com/01_ApsaraStackEnterprise/V3.5.2- intl-en/Alibaba%20Cloud%20Apsara%20Stack%20Enterprise%201808%20Security%20White paper%20-% 2020180831.pdf

Which of the following services can the company choose?

A company wants to migrate its system to public cloud platform and they choose Alibaba Cloud. The migration process is very important and they want to ensure that everything works right.

Which of the following services can the company choose?
A . Event Management Service
B. Aftersales Support
C. Alibaba Cloud Architecture Design Training
D. Alibaba Cloud Product Operation Training

Answer: B

A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located installed 35 HD cameras to monitor the major exits. The surveillance system is deployed on an ECS instance, which has four 2 TB data disks to store video data.

A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located installed 35 HD cameras to monitor the major exits. The surveillance system is deployed on an ECS instance, which has four 2 TB data disks to store video data.

However, video data grows rapidly and the engineers find that the ECS will run out of storage space within 2 weeks.

In this case,product is thought to be the best solution for addressing the storage challenge while ensuring quick access to historical video data when needed.
A . Container Service
B. ECS
C. OSS
D. CDN

Answer: C

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies.

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies.

It supports adding existing ECS instances into the scaling group, whose status however must be________.
A . Running
B. Created
C. Stopped
D. Preparing

Answer: A

Explanation:

Reference: http://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/DNESS1876951_en-US_intl_181115175025_public_176152014821b385708e5290da11a0fe.pdf (14)