023 Device and Storage Security - 023.4 Data Availability (weight: 2)

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Questions and Answers

What is a primary reason for creating backups?

To eliminate the need for data storage

To prevent unauthorized access to files

To reduce internet bandwidth usage

To restore data when it becomes corrupt or inaccessible (correct)

Which backup strategy involves saving only the data that has changed since the last full backup?

Full Backup

Incremental Backup

Snapshot Backup

Differential Backup (correct)

What challenge is associated with creating a new full backup every day?

It avoids data redundancy issues

It leads to excessive storage needs and time consumption (correct)

It requires advanced data encryption methods

It simplifies data access protocols

How does combining different types of backups benefit a backup strategy?

It can significantly reduce backup duration and storage requirements Signup and view all the answers

Which of the following best defines 'Incremental Backup'?

Backing up files that have changed since the last backup of any type Signup and view all the answers

What does the 'Retention' parameter in a backup strategy refer to?

The length of time backups are kept Signup and view all the answers

What type of backup captures the entire data set, regardless of changes?

Full Backup Signup and view all the answers

Which of the following is NOT a requirement for effective backups?

Storage of only recently modified files Signup and view all the answers

At what time are backups scheduled to take place?

3:00 AM Signup and view all the answers

What is the retention period for incremental backups?

30 days Signup and view all the answers

Which type of storage media is more cost-effective for large data amounts?

Magnetic Tapes Signup and view all the answers

What is a potential risk of cloud storage in terms of accessibility?

Dependency on a stable internet connection Signup and view all the answers

What should be done to external backups for security?

Encrypt them, and ensure the key is accessible Signup and view all the answers

What is a consequence of using automatic data synchronization across devices?

It can spread errors between devices Signup and view all the answers

Which of the following describes a common issue with misconfigured cloud services?

Global exposure of confidential data Signup and view all the answers

What is an advantage of using cloud storage for backup purposes?

Availability even during infrastructure failure Signup and view all the answers

What must be assessed regarding the recovery of data from cloud storage?

Cost and duration of outgoing data transfer Signup and view all the answers

Why should backups be stored at different physical locations?

To enhance redundancy and protect against physical disasters Signup and view all the answers

Study Notes

Importance of Backups

Data can become corrupted or inaccessible due to human errors, technical failures, or cyberattacks like ransomware.
Regular backups are vital to minimize data loss and ensure recovery availability.

Backup Requirements

Frequent backups reduce potential data loss during restoration.
Archiving allows recovery to specific points in time.
Fast restoration is achieved by keeping data in easily accessible locations.

Backup Challenges

Creating a new backup copy of all data daily is impractical due to:
- Massive storage needs and long backup process durations.
- Changes typically affect only a small portion of data.

Types of Backup Strategies

Full Backup: Backs up the entire data set.
Differential Backup: Backs up only data that has changed since the last full backup.
Incremental Backup: Backs up only data modified since the last backup of any kind.

Key Backup Parameters

Frequency: Dictates how often backups occur.
Retention: Determines how long backups are stored.
Combining different backups can significantly reduce storage needs and allow for more frequent backups.

Example of a Backup Strategy

Backups are performed nightly at 3:00 AM.
Full backups occur on the first of each month, with incremental backups on all other days.
Incremental backups are retained for 30 days; full backups for two years.

Backup Storage Considerations

Storage medium costs vary, with magnetic tapes being cheaper than NVMe SSDs.
Recovery time can differ, with physical drives in secure places often faster than over slow connections.
Backup resilience is crucial; original data and backups should be stored separately to avoid simultaneous loss.
Encryption is necessary for externally stored backups, with accessible keys for recovery.

Cloud Storage Services

Client services facilitate central data storage, accessible online from various devices.
Cloud services often offer built-in backup options for multiple versions of data.

Cloud Dependency and Risks

Access to cloud services relies on internet connectivity and provider functionality.
Misconfigurations can lead to sensitive data exposure online.
Backup strategies should include off-cloud copies due to potential service outages.
Outgoing data transfer costs for backups can be significant.

Fine-tuned access rights can create complex permission structures, risking data leaks if not managed properly.
Data can be shared with third parties for collaboration, but safeguards are needed to prevent accidental sharing.

Automatic Data Synchronization Issues

Automatic synchronization across devices can spread errors quickly.
Data deletions or encryptions on one device may propagate to the cloud and other synced devices.
Malware stored on one synced device can easily affect others.

Utilizing Cloud for Backup Storage

Cloud storage can effectively serve as a backup location, ensuring data recovery even if local infrastructure fails.
Important considerations include:
- Ensuring backups are encrypted.
- Pre-calculating costs and times for recovery data transfer.

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Description

Explore the essential concepts of data backups and understand their significance in preventing data loss due to human errors, technical failures, or cyberattacks. This quiz will help you assess your knowledge of backup terminology and strategies for ensuring data integrity.