Answer:
Importance of backup in system administration:
Backups are crucial in system administrations for preserving continuity and protecting against specific types of hardware failures, service interruptions, and human mistakes. To aid a company in recovering from an unexpected catastrophe, backup copies make it possible to restore data to a previous point in time. To safeguard against primary data loss or corruption, it is essential to save a copies of data on a different media. When a system administrator create a backup, he makes a copy of the data that you can restore if your main data is lost. These errors may be the consequence of faulty hardware or software, corrupted data, or a human error like a targeted attack or an unintentional deletion. System backup and recovery is therefore a crucial skill for system administrators as well as the companies they work for.
Three methods for performing backup:
- Disk image: A efficient method to back up not only the files and directories but also everything else on the system is by creating a disk image. If a user have a disk image, the user can restore everything, including the operating system, applications, data, and more, so the user won't have to worry about any difficulties. Placing the disk image-containing DVD into the DVD-ROM to restore the backup. Additionally, just attach an external HDD to the computer if the user have a disk image that they made.
- External hard drive: The most common backup method is to use an external hard drive or even a USB flash drive. An HDD can be easily, quickly, and affordably backed up. It is effective since consumers may carry their portable backup with them wherever they go.
- Cloud backup: Cloud backup or Online backup has been around for a while, but not many people really utilize it. But the greatest backup technique by far is cloud backup. The user does not have to worry about hardware problems because their files are saved in the cloud and can be accessed from anywhere because the backups are automatically produced and everything is synchronized. It is one of the greatest methods to backup, especially when you consider that the contents are encrypted and stored securely.
The answer is A. A firewall is a piece of software that monitors all connections to make sure no attacks can be made in the internal or external networks
I believe the answer is B lol
Answer:
The reason why software products are developed and delivered quickly is because
- most of the time client cannot wait an extended time for the merchandise to be developed and delivered because the delay in delivery of software products might cause a loss for the client if that specific software is being developed for the client's business solution.
- In some mission-critical applications like defense systems, space research systems in such cases software must be delivered as quickly as possible because the project which is getting into such area cannot await an extended time for a software package to be delivered as here time constraint is involved and delay in at some point might cause a loss for an entire ongoing project.
Explanation:
Sometimes sensible to deliver an unfinished product then issue new versions of that product after delivery because
- Sometimes the software that has got to be developed could be very big which isn't possible to develop during a shorter time and even client cannot wait an extended time for he's software in such case only the primary main core functionality of the software is being developed and delivered to the client and in later version remaining functionality's are included and delivered.
- Even it is often the case that software that has got to be developed is very complex and should get lots of obstacles during development in such cases also only the core functionalities are being developed and delivered and in later version remaining functionality's are included.
3) Presence of bugs in software may also lead to issue a new version of that software after delivery and then fix the bug and deliver the new version to the client.