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NEW QUESTION: 1
A company recently deployed a two-tier application in two Availability Zones in the us-east-1 Region.
The databases are deployed in a private subnet while the web servers are deployed in a public subnet.
An internet gateway is attached to the VPC. The application and database run on Amazon EC2 instances.
The database servers are unable to access patches on the internet.
A solutions architect needs to design a solution that maintains database security with the least operational overhead.
Which solution meets these requirements?
A. Deploy two NAT instances inside the private subnet for each Availability Zone and associate them with Elastic IP addresses.
Update the routing table of the private subnet to use it as the default route.
B. Deploy a NAT gateway inside the private subnet for each Availability Zone and associate it with an Elastic IP address.
Update the routing table of the private subnet to use it as the default route.
C. Deploy two NAT instances inside the public subnet for each Availability Zone and associate them with Elastic IP addresses.
Update the routing table of the private subnet to use it as the default route.
D. Deploy a NAT gateway inside the public subnet for each Availability Zone and associate it with an Elastic IP address.
Update the routing table of the private subnet to use it as the default route.
Answer: D
Explanation:
VPC with public and private subnets (NAT)
The configuration for this scenario includes a virtual private cloud (VPC) with a public subnet and a private subnet. We recommend this scenario if you want to run a public-facing web application, while maintaining back-end servers that aren't publicly accessible. A common example is a multi- tier website, with the web servers in a public subnet and the database servers in a private subnet.
You can set up security and routing so that the web servers can communicate with the database servers.
The instances in the public subnet can send outbound traffic directly to the Internet, whereas the instances in the private subnet can't. Instead, the instances in the private subnet can access the Internet by using a network address translation (NAT) gateway that resides in the public subnet.
The database servers can connect to the Internet for software updates using the NAT gateway, but the Internet cannot establish connections to the database servers.
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Scenario2.html
NEW QUESTION: 2
A sensor that uses a light beam and a detecting plate to alarm if the light beam is obstructed is most commonly used to identify which of the following threats?
A. Toxins
B. Smoke
C. Natural Gas
D. Power
E. Water
Answer: B
NEW QUESTION: 3
Note: This question is part of a series of questions that use the same or similar answer choices. An
answer choice may be correct for more than one question in the series. Each question is
independent of the other questions in this series. Information and details provided in a question
apply only to that question.
A company has several Microsoft SQL Server database in Microsoft Azure.
One database experiences a storage failure, and pages that store critical database metadata are
corrupted.
You need to perform an offline restore of the database's pages.
Which option should you use first?
A. mirrored backup media sets
B. back up and truncate the transaction log
C. tail-log backup
D. backup encryption
E. SQL Server backup to URL
F. file snapshot backup
G. SQL Server Managed Backup to Azure
H. backup compression
Answer: C
Explanation:
Explanation/Reference:
Explanation:
An unbroken chain of log backups must be available, up to the current log file, and they must all be applied
to bring the page up to date with the current log file.
A tail-log backup captures any log records that have not yet been backed up (the tail of the log) to prevent
work loss and to keep the log chain intact. Before you can recover a SQL Server database to its latest
point in time, you must back up the tail of its transaction log. The tail-log backup will be the last backup of
interest in the recovery plan for the database.
Note: The goal of a page restore is to restore one or more damaged pages without restoring the whole
database. Typically, pages that are candidates for restore have been marked as "suspect" because of an
error that is encountered when accessing the page.
References:
https://docs.microsoft.com/en-us/sql/relational-databases/backup-restore/tail-log-backups-sql-server?
view=sql-server-2017#TailLogScenarios
https://docs.microsoft.com/en-us/sql/relational-databases/backup-restore/restore-pages-sql-server?
view=sql-server-2017#Restrictions