During a scaling activity, when Auto Scaling fails to add ECS instances into a scaling group, it will try to ensure transaction completeness and roll back the scaling activity.

For example, a scaling activity intends to create and add 20 ECS instances into the scaling group, but only 19 of them are added successfully. In this case, the entire scaling activity will be rolled back, and the 19 instances will be removed and released as well.

SLB is a load balancing service that distributes traffic to multiple cloud servers It provides a wide range of functions to meet the needs of various business scenarios If a user wants to use SLB and ECS instances to deploy two-way authenticated HTTPS websites, the following statement is correct_______.

To connect a VPC with your traditional IDC (Internet Data Center), Alibaba Cloud currently supports the following methods: _______________? (Choose two.)

When the "'Obtain the Visitor's Real IP Address" function is enabled in Alibaba Cloud SLB For layer 7 services, you can obtain the real IP addresses of visitors through the______________field in HTTP header

Cloud Disk is a block storage product provided by Alibaba Cloud (especially for ECS). It features low latency and high reliability. Which of the following statements is true for Cloud Disk?

User A is the system administrator of a company who frequently travels to Shanghai. Each time he remotely logs on to the server in Shanghai, an alert is reported, prompting, “Someone is remotely logging on to the server. Please pay attention to your server security.” Which of the following methods can be used to quickly and automatically resolve this problem?

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.)

The daily PV volume of a community website is as high as 20 million. The applications of the website are deployed on ECS instances while logs are stored on the data disks of a single ECS instance.

Now, the website wants to extend the log retention period to 24 months and ensure that logs can be quickly downloaded when needed. The current data disks they have can only help retain three months of logs In this case, ________ is the ideal solution for solving the log retention issue.

When distributing loads to multiple ECS instances with an Alibaba Cloud Server Load Balancer (SLB), you can obtain the real IP addresses of users who initiate the requests through _____________. (Choose two.)

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 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?

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. When talking about information security, the advantages of using OSS are ____________. (Choose two.)

When adopting cloud computing and taking advantage of its convenience, you will also face challenges in information security.

Using cloud computing does not increase security risks, but your active engagement is still a must. Which of the following is not included in the security principles recommended by Alibaba Cloud?

Which of the following statements is true for Alibaba Cloud RDS?

A new media company uses a mobile app to provide news and information services. They utilize Auto Scaling to add/reduce ECS instances dynamically to address service traffic spikes.

Based on the estimation of their service and technical personnel the company thinks they require 10 ECS instances during idle hours and 10 to 20 ECS instances (dynamically adjusted) during some busy hours, which are normally from 07:30 to 09:00 and from 18:30 to 20:00 In the scaling group; they set the "Minimum number of instances" to 10 and "Maximum number of instances" to 20.

To simplify deployment tasks and save costs, which of the following scaling modes should they choose?

Alibaba Cloud SLB can help distribute traffic among multiple backend servers. Which of the following statements is correct about backend servers?

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”?

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. OSS uses multiple copies of data to achieve data redundancy and can restore interrupted OSS services within two minutes when hardware failure occurs.

Alibaba Cloud Server Guard provides brute-force password cracking protection. Therefore, users who have activated Server Guard neither need to modify the administrator password of their ECS instances periodically nor need to set a complicated password.

Before data communication is setup, the security groups match the security group rules one by one to query whether to allow access requests Assume that the user has created two security group rules 1 and 2 The protocol type, port range, authorization type, and authorization object of the two security group rules are the same. The difference is that Rule 1 is a denial policy, rule 2 is an allowed policy, so the following statement is correct_______ (Number of correct answers 2)

Many cloud computing service providers support users to activate/create a cloud service through Open API. Which of the following protocols is most not likely to be supported by these Open API?

When using the Open API in ECS, you have to send out HTTP GET requests and append corresponding request parameters according to the API description.

An online education website is built based on ECS. SLB and Auto Scaling, which greatly reduces resource cost, O&M cost and without compromising system stability and user experience.

Now. the website admin wants to keep the user information (such as source IP, accessed URLs, and duration on each page) for analysis to support their upcoming campaign events In this case, which of the following statements is NOT correct?

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 access IP address that can be seen on the backend ECS instance is the IP address of SLB instead of the client’s real IP address.

Alibaba Cloud will check source IP addresses that connect to ApsaraDB for RDS through the public internet. When Alibaba Cloud Situation Awareness detects an alert reporting “a seldom-used IP address connecting to the database,” which of the following is the safest way to handle this alert?

An insurance company has more than 200,000 online orders per day on their platform. Over the past year, the platform has suffered frequent large volume DDoS attacks (exceeding 10 Gbps). Which of the following Alibaba Cloud products can the customer use to defend against this type of attack and ensure service availability?

Which of the following statements is true for RDS?

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

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. No traffic charges are applied when files are uploaded to OSS via the management console or using Open API.

All versions of Alibaba Cloud RDS use master-slave mode to ensure high availability. When the master database fails, RDS will switch to the standby database within 30 seconds.

OSS supports deleting buckets. Before deleting a bucket, you must delete all the files in the bucket, including incomplete upload segments.

You have set an alert policy for the disk usage of an ECS instance by using Alibaba Cloud CloudMonitor. Each measurement cycle lasts for 5 minutes, during which the average disk usage is measured. If the average disk usage exceeds 80% for five consecutive measurement cycles, an alert will be reported. After your average disk usage exceeds 80%, how long will it take to receive an alert?

Which of the following statements is wrong about changing the specification of an RDS instance?

A video company uses SLB to distribute user requests to 20 ECS instances with the same configuration to response these requests. As the Spring Festival approaches, service traffic would double during holidays (based on past experience). Thus, you use Auto Scaling to elastically adjust computing resources. Since the services is online for many years, you have historic records that can help predict the upcoming service traffic and choose the scaling mode freely. In this scenario, which of the following options are feasible and with minimum operation efforts? (Number of correct answers: 2)

In an Alibaba Cloud Elastic Compute Service (ECS) instance, if you subscribe to the SELINUX service in Linux, this will not affect the monitoring feature in the ECS management console.

The Alibaba Cloud CDN can directly accelerate access to the files stored in OSS and reduce OSS traffic costs.

Which of the following database engines are compatible with RDS? (Choose three.)

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)

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. OSS provides multiple types of monitoring reports to help you monitor OSS resource consumption in real time. Which of the following monitoring functions are supported by OSS? (Choose three.)

You deployed a MySQL database on an Alibaba Cloud Elastic Compute Service (ECS) instance. Due to increased traffic, you want to improve performance by splitting read/write requests. Therefore, you can use Alibaba Cloud ___________ to solve this issue.

Alibaba Cloud Content Delivery Network (CDN) is a distributed network that is built and overlaid on the bearer network Moreover it is composed of edge node server clusters distributed across different regions. It replaces the traditional data transmission mode, which is centered on Web servers. When using Alibaba Cloud CDN, a user's request wilt first reach the edge node, and then receive data from the origin site by means of back-to-source Moreover, the admin can obtain visitor's real IP on the origin site. Which of the following descriptions relate to "obtaining visitors real IP" are correct? (Number of correct answers: 2)

Availability Zones refer to data centers in the same region with independent power grids and networks. Which of the following statements are true for Zones? (Choose three.)

A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located has 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 so rapidly that the engineers find 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.

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. For a website consisting of static pages, they can use OSS to host these static pages. Meanwhile, using OSS in conjunction with ___________ product for acceleration purposes.

Alibaba Cloud Object Storage is suitable for storing unstructured data such as pictures and videos.

For ECS and RDS instances under different Alibaba Cloud accounts but in the same region, which of the following statements is NOT correct for migrating self-built MySQL databases (running on ECS) to RDS?

Alibaba Cloud Content Delivery Network (CDN) performs content acceleration with the support of intelligent DNS resolution The following function_________is NOT included in intelligent DNS resolution.

Which of the following is not a potential cause of latency on an RDS read-only instance?

RDS accounts can be used to connect with the databases created on a given RDS instance. Each account can be bound with multiple databases. Yet, the read/write permissions of each database can only be assigned to one RDS account

You deployed a MySQL database on an Alibaba Cloud Elastic Compute Service (ECS) instance. Due to increased traffic, there are more and more O&M tasks, such as database backup and Master/Slave database synchronization, and these tasks are becoming overwhelming.

Therefore, you can use Alibaba Cloud ___________ to solve this issue.

Auto Scaling can automatically adjust the number of ECS instances based on user-defined scaling rules to meet service needs. If a user cannot predict service changes or does not have enough history data, he/she can still use dynamic scaling mode to automatically add/remove ECS instances based on certain Cloud Monitor performance metrics (such as the CPU utilization rate)

Which of the following statements about an OSS bucket is NOT correct?

In Alibaba Cloud Object Storage, users want to use graphical tools to upload and download object files. Which tools can they use?