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System Engineer Interview
System Engineer Interview
77
Other
Professional
11/21/2022

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Term
What are the roles of a systems Engineer?
Definition
A systems engineer works with other departments in large organizations to meet the needs of customers and clientele base. Primary roles, 1: First he focuses on installing, settingup, configuring and maintaining hardware and software systems. 2: Analayes data in an organization to improve it and helps balace complex aspects of a project. 3: He ensures that upgrades to the systesms are implemented so as to enhance security.
Term
What qualities should a systems engineer possesses?
Definition
My skills go beyond long years of experience in Help Desk and other technical skills. For instance I have patience and preseverance in working the complicated systems. I have significant technical and analystical skills to preform various tasks, to help the team and the business
Term
What major challenge did you face during your last role? How did you handle it?
Definition
One major challenge that arose in my prevous role was the increasing complexity of various problems that I was called upon to solve, including system failures. For example, to help get the call center computers back up and online I have built and rebuilt the Fog server. I have also written many how to documents that we have sent out to users to help them learn how to fix issues.
Term
Does Learning about new technology excite you?
Definition
I am alwasy open to discover new things since technology is ever-changing. I am hungry to learn. I have started to learn Kuberneticies, by installing mini cube and starting to learn KUBECTL commands. I have also with my work with the Fog server really been trying to learn Linux commands and linux support.
Term
As a systems engineer what part of the job will you find most challenging?
Definition
Looking into complex systems and their behavior and how they work is a challenge. I have also started to become familar with front door, how it works since it is our firewall. I realize that there is so much to learn to get up to speed and it will be a challenge, but in working on the help desk I have learned that I am up for the challenge of learning to be a team player, a reliable back up and help for my team.
Term
How would you react to a team member who has made an intense mistake?
Definition
It is not my place to judge or look down on anyone who has made a mistake, because they are just that mistakes. I have made plenty myself. The important thing I have learned is to own your mistakes, appoligize and do everything you can to fix it, envolve the rest of your team if needed to help.
Term
Where do you see yourself in Five years?
Definition
I look foward to learning all I can over the next five years to get myself up to speed, with the next goal of earning the title of SR engineer. I am loyal and will be here working hard and giving it my all.
Term
Why do you think you are the best canadidate for the job?
Definition
I love my job. I love working for Nature's Sunshine. I am loyal, and I am a hard worker. I am reliable. I am not afraid to ask questions. I am self motivated to learn and grow into this new role and build upon my help desk experience. I am ready to jump into this role and learn to swim in deeper water.
Term
Have you ever designed a softare or system? What would you say the process is?
Definition
Four step process. Analyzing the requirements, including the suitability of th enviorment, system analysis to meausre and manage needs of the company vs costs.
Term
What is your take on the frequency of upgrading systems?
Definition
Security in an organization is enhanced when systems cannot be hacked or bugged, to mention a few. Patching is vitual to protecting our systems, network, and users from harmful attacks. Upgrades can be carried out every couple of years or as needed.
Term
How would you explain a difficult technical problem to a stake holder?
Definition
I would use a cheat sheet, for instance to help them understand the technical terms in a simple way that they can udnerstand. Use annalogies, or simple ways of explaining to help them understand. A network system diagram or process flow.
Term
What would you recommend for the improvement of our current systems?
Definition
As a systems engineer my principal responsibility would be to evaluate the performance of the existing systesm and identify areas that need useful improvement.
Term
How do you plan an dprioritze work and projects?
Definition
On the help desk I had my to do list, which was my tickets. I ordered them and did them in the order of urgency, putting the larger fires first. While working on the larger projects on the side. There is always something that needs to be done.
Term
How would you handle high sevirty issues and challenges?
Definition
I am used to working under pressure. unexpected issues happened every day. I have learned that running towards the issue, asking for help from my team, and being patent to look at the problem is key to soloving the problem.
Term
How would you start to solve a complex problem that is affecting production?
Definition
I would start off by trying to understand the problem. Ideally, decreasing production may be as a result of systesm failure or managing of systems. What has changed, deployment, unplanned changed, systems failure, any alarms? From there I would establish a plan, and work with the Help Desk.
Term
How do you keep up with the latest systems technology?
Definition
Reading, talking with people, talking with family.
Term
How would you troubleshoot the problem of a slow running system.
Definition
I would look at the system logs and system tasks what might be causing the issue. I would then consider again, when did it start, is it network related, after pin pointing the problem. I would work with my team and others as needed to fix the problem.
Term
Tell me about yourself?
Definition
Provide information about you that i related to systesm the Systems engineer position. Talk about experience, education, and certifications
Term
Explain the role of Windows Server?
Definition
Windows Server is an operation system that uses a centralized computer that provides specific functions, predeterminded rules for users, computers, that are connected to a network.
Term
What is Windows Domain?
Definition
Windows domain is a centeralized location for users accounts computers, printers, security, and features or part of a databased controlled by a domain controler.
Term
What is Activie Directory?
Definition
Active Directory is the directory service used in Microsoft networks. A directory service (or name service) connects network resources (such as volumes, folders, files, printers, users, groups and devices) with their respective network addresses, and provides that information to entities in the network.
Term
What does Active Directory DO?
Definition
  • Authentication — Ensuring that each security principal is who they say they are, usually by verifying credentials such as a user ID and password during a logon process.
  • Authorization — Ensuring that each security principal can use only the data and services they are permitted to access.
  • Name resolution — Enabling clients and domain controllers to locate and communicate with each other. AD DS uses DNS as its main name resolution method.
  • Centralized management — Controlling a wide variety of settings from a single location via a feature called Group Policy.
Term
What is an Active Directory Object?
Definition
  • User account
  • Computer account
  • Group
  • Printer
  • Share
Term

Organizational units (OUs)

Definition
AD objects within a domain can be grouped into logical containers called organizational units (OUs). OUs are objects too, which allows administrators to create nested OUs. All objects in any given OU must have unique names, and each object can be in only one OU at any given time.
Term
What are AD Groups?
Definition
AD groups. A group is a collection of AD objects, such as users, whose membership in the group grants them certain permissions. A given user can be (and usually is) a member of multiple groups. 
Term
What is a Domain?
Definition

Domains

 

An Active Directory domain is a logical group of objects (users, computers, OUs and so on) that is managed by the same administrative team and is usually located on the same physical network.

 

Term
What are Active Directory Tress?
Definition

Trees

 

Domains are organized into trees. An AD DS tree consists of multiple domains connected by two-way transitive trusts. Each domain in an AD DS tree shares a common schema and global catalog.

 

Term
What are Active Directory Forests?
Definition

Forests

 

The Active Directory forest is the highest level of the hierarchy. While domains represent administrative boundaries, forests are the main security boundary for AD DS; it is assumed that all domain administrators within a forest are trusted to some degree. Objects in separate forests are not able to interact with each other unless the administrators of each of those forests create a trust between them.

 

Term
What are Active Directory Physical Structure
Definition
  • Hosts — Devices connected to the domain network
  • Subnets — Network groups with a specified range of IP addresses and a network mask
  • Sites — Groups of one or more subnets used to optimize bandwidth use by the DC replication service
Term
What is a DNS and what port does it use?
Definition
DNS Domain name system it mostly used to interpet domain names into IP addresses. DNS uses port 53
Term
How many queries does DNS perform and what are they called?
Definition
DNS performs to types of querries, iterative and recursive
Term
Active Directory Database is located where?
Definition
Using file name NTDS.DIT, it is lcoated in the %systemroot%\NTDS folder
Term
How do you back up active directory?
Definition

Active directory can be backe dup using NTBackup too that comes with 2003 server. 

A command prompt is used 

Wbadmin start systemstatebackup-backuptarget:e:

Term
Do you know what SYSVol folder is?
Definition
System volume folder is a directory that houes a copy of domain files on the local hard drive with in a domain controller. this data is shared for purposes of replaction across domain. For example user logon scripts and users group policy.
Term
What is RAID?
Definition
RAID is an acronym for “redundant array of independent drives (or disks).” Basically, RAID lets you take several hard drives and group them as one unit. This can help you store backups of your data in case a drive fails, or improve the speed and efficiency of your drives, or both.
Term

What Is RAID 0?

Definition

Also called “disk striping,” RAID 0 is all about optimizing the speed of your hard drives. If you have at least two drives, using RAID 0 will combine them and write data on both of them simultaneously or sequentially, depending on your system. This will help with read and write speeds. However, if one drive fails, you will lose all of your data.

When you save a file, RAID 0 breaks the data into segments called striped units. Then it spreads that data across all of the drives in your array. This is called striping, and it helps you access data faster because you have multiple drives working together to read, write, and store data.

Using RAID 0 is faster than getting a large hard drive with the same capacity because you would only have one hard drive processing data instead of multiple drives in an array.

Term

What is RAID 1?

Definition

Otherwise known as “disk mirroring,” RAID 1 is all about backing up data (also known as redundancy). If you have at least two drives, using RAID 1 will duplicate your data and store a copy on each drive. This is called mirroring, and it ensures you won’t lose your files if a drive fails.

Using RAID 1 means that if one drive fails, you’ll still have a copy of all your data on the other drive. Then, you can replace the failed drive with a new one, even while the computer is still running. It will automatically create a new mirror image of all your data on the good drive. This capability in RAID arrays is called hot-swappable.

However, using RAID 1 means that you will only get half the storage capacity that you would get otherwise. This is because every time you save a file to one drive, you save a copy to a second drive.

RAID 1 is best used for storing data that you don’t want to lose, such as crucial banking data or family photos and documents.

Term
What commands would you uses to test network connectivity?
Definition
Ping and IPConfig
Term
What command would you use to show open ports?
Definition

Netstat

To check open portsopen a command prompt (or PowerShell) as administrator and run the netstat command as follows: netstat -aon The command displays lots of information. What you should pay attention to are Local Addresses that are in the LISTENING state. As you can see in the previous screenshot, In my Windows 10 computer, port 22 (SSH) is open.

Term
Explain what group policy is?
Definition
Group policy is used to control users, desktops, and computer configuration by creating defual template for specific members of the group. This makes it easier to control and process larger groups of users.
Term
Name diffferent types of email servers and what ports they use?
Definition
What can you can have two types of email servers and incoming and an outgoing server.  Incoming server can use POP3 port 110, IMAP pfor 143, HTTP 80) Out going mail server users SMTP port 25
Term
Do you know what a Virtual Machine is?
Definition
A virtual machine (VM) is a digital version of a physical computer. Virtual machine software can run programs and operating systems, store data, connect to networks, and do other computing functions, and requires maintenance such as updates and system monitoring. 
Term
Do you know what Tatooing regestriy means?
Definition
Tattooing was the effect that you saw whenever you applied a registry policy to a computer or user and then removed that policy file. Even though the policy file was gone, those registry values that were set by the policy remained-tattooed into the registry until you explicitly removed them,
Term
Why should we hire you?
Definition
Talk about any other exerperience that you have had related to this job. Mention being hard working, reliable, ready and egar to learn, a team player, and not afraid to ask questions.
Term
What is a firewall?
Definition
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. Firewalls have been a first line of defense in network security for over 25 years.
Term
What is Azure Front Door?
Definition
Azure Front Door is a scalable and secure entry point for fast delivery of your global web applications. Learn about Azure Front Door Overview What is Azure Front Door? Training Introduction to Azure Front Door Create a Front Door Quickstart Create a Front Door Learn about Front Door and CDN (Content Delivery Network) architecture Architecture
Term
Whjat are some best  practices for  performing Windows Patching. 
Definition

Downtime

Downtime is the key factor in entire patching activity. Many of us are experiencing issues while getting downtime for business.  Every organization handles it differently, based on business approval. Few of the methods which can be used mentioned below.!

 

Scheduling

As mentioned above, getting downtime is always a challenging task for all administrators. There are a couple of points, that we need to consider while preparing a schedule to line up it with agreed downtime.

 

Change Management

Change management is also one of the important factors in patching. This gives awareness about the upcoming changes in the environment and also help from an audit point of view. Every organization will have defined process based on business needs. It's recommended using Standard Change Template since patching activity is one of the mandatory activities which will be performed on a monthly basis. Using Standard Template we minimize the change initiator work of drafting the Change Description/Change Task etc.

 

Compliance and Reporting

It’s very important to carry out compliance check post completion of patching. Measuring the implanted work is always beneficial to the organization from the security audit point of view.

It’s recommended to perform patching compliance imitated post completion of patching. For example – if you have four hours of downtime, then perform the patching compliance scan on second of third hours so that you can re-patch the servers within the same downtime under approved change. If you missed checking compliance within the same downtime window, then you may need to request for new downtime for business and also need to raise a separate change ticket.

If your compliance mechanism is giving compliance data after 24/48 hours, then its recommended patching missing servers in upcoming downtime windows. Do not keep a backlog for a longer time. This impact on the overall compliance by end of month cycle.

Term

What are the differenty Types of Windows Server Migration, Install, upgrade, or migrate to Windows Server

Definition

Clean install

Clean install is simplest way to install Win

In-place upgrade

In-place upgrade enables you to keep the same hardware and all the server roles you have set up without wiping and reinstalling the operating system, by which you go from an older operating system to a newer one, keeping your settings, server roles and features, and data intact. For example, if your server is running Windows Server 2019, you can upgrade it to Windows Server 2022. However, not every older operating system has a pathway to every newer one and some roles or features don't support this or need you to take extra steps. In-place upgrade works best in virtual machines where specific OEM hardware drivers are not needed for a successful upgrade.

For step-by-step guidance and more information on upgrading, review the Windows Server upgrade content and Upgrade and migrate roles and features in Windows Server.dows Server, where you install on a blank server or overwrite an existing operating system, but you will need to back up your data first and plan to reinstall your applications. There are a few things to be aware of, such as hardware requirements, so be sure to check the details for Windows Server.

Cluster Operating System rolling upgrade

Cluster Operating System (OS) rolling upgrade gives an administrator the ability to upgrade the operating system of the cluster nodes without stopping the Hyper-V or the Scale-Out File Server workloads. For example, if nodes in your cluster are running Windows Server 2019 you can install Windows Server 2022 on them avoiding downtime to the cluster, which would otherwise impact Service Level Agreements. This feature is discussed in more detail at Cluster OS rolling upgrade.

Migration

Migration of Windows Server is when you move one role or feature at a time from a source computer that is running Windows Server to another destination computer that is running Windows Server, either the same or a newer version. For these purposes, migration is defined as moving one role or feature and its data to a different computer, not upgrading the feature on the same computer.

License conversion

License conversion enables you to convert a particular edition of the release to another edition of the same release in a single step with a simple command and the appropriate license key for some Windows Server releases. For example, if your server is running Windows Server 2022 Standard, you can convert it to Windows Server 2022 Datacenter. Keep in mind that while you can move up from Windows Server 2022 Standard to Windows Server 2022 Datacenter, you are unable to reverse the process and go from Datacenter edition to Standard edition. In some releases of Windows Server, you can also freely convert between OEM, volume-licensed, and retail versions with the same command and the appropriate key.

 

Term
What is DHCP and when have you used it? Give an example.
Definition
(Dynamic Host Configuration Protroical)
Term
What is DNS what is it used for? Give an example of a problem.
Definition

(Domain Name System) Gives a friendly name to an IP address. 

 

Term

What is a Ping? what protocol does ping use? When have you used it? 

How do you calculate latency?

Definition

Ping uses icmp protocol 

Ping 8.8.8.8 

For example: 17.248ms is the round trip time

at the bottom of the command window after stopping ping will show the min/average/max

 

Anything at 100ms or less is considered acceptable for gaming. However, 20-40ms is optimal.

 

The more common way of measuring latency is called “round-trip time” (or RTT), which calculates the time it takes for a data packet to travel from one point to another on the network and for a response to be sent back to the source.

Latency = Transmission delay+propagation delay

[image]

Term

How do you check if a port is open? 

Why you would port is open, example if that was done in that past

 

Definition

Done this in the past with IPTools install and troubleshooting 

 

In PowerShell Test-netconnection (Ipaddres or DNS name)- port #

[image]

 

Netstat will show all active connections

 

Term
What is Powershell? When have you used it?
Definition

PowerShell is a modern command shell that includes the best features of other popular shells. Unlike most shells that only accept and return text, PowerShell accepts and returns .NET objects.

Can be used with

Microsoft

  • Azure
  • Windows
  • Exchange
  • SQL
Term
What is a "A" DNS Record
Definition
A and a AAAA Record
A (address) records are one of the most basic and commonly used DNS record types. They translate domain names and store them as IP addresses. A records can only hold IPv4 addresses.
TTL: Time to live, which controls how long DNS resolvers should cache a response before revalidating it.
Term
What is a DNS Record?
Definition
DNS records or zone files store information about domains. They consist of a series of text files written in the DNS syntax and are stored on DNS servers.
Term
What is a CNAME DNS record
Definition
CNAME or canonical record is a way to simplify the management of subdomains. You just point the subdomain like www.domain.com to the actual name domain.com (without the www. part), and that way, you don’t need to add extra records for that subdomain. All queries for the subdomain will go to the main one.
Term
What is an NS DNS record
Definition
The nameserver records have the purpose of showing all the nameservers for the particular domain. You can have multiple NS records and add all the available ns servers.
Term
PTR record
Definition
This record is used for backchecks. It points an IPv4 or IPv6 address to a hostname. Why do you need it? Because the rest of the servers somewhere in the world might need to confirm that an IP address really belongs to a hostname before using a service, engage in communication, or any other activity. It is used a lot in the verification of the host.
Term
TXT record
Definition
TXT is a simple and readable DNS record. You can make a txt lookup and from the answer, understand it well. It is used to verify the host or a complete chain of trust. You can see multiple TXT records for the same domain like SPF, DKIM, and DMARC. Each has a different mechanism to check a part and verify that it is correct.
Term
What is Windows Server Update Services (WSUS)
Definition
enables information technology administrators to deploy the latest Microsoft product updates. You can use WSUS to fully manage the distribution of updates that are released through Microsoft Update to computers on your network. This topic provides an overview of this server's role and more information about how to deploy and maintain WSUS.
Term
Patch management for Windows steps
Definition
1: Create or follow a patch management policy
2: Scan the network and devices on a regular basis to identify vulnerabilities and missing patches.
3:Validate the successful deployment of the downloaded patches in a testing environment and check for any incompatibilities or performance issues.
4: Apply the patch across the entire organization, if no issues were uncovered during the testing phase.
5: Create detailed documentation and reports about patch download, testing and installation for auditing and compliance.

Though these steps may vary, the larger point is the updates should not be installed as they become available. Instead, they should go through a process laid down by the organization. Such a process-oriented approach will also make it easy to follow some of the best practices of patch management.
Term
Windows patch management best practices
Definition
1: Test before applying updates
2: Keep up with news from third-party patch monitoring sites
3: Check the issues that Microsoft knows about for each patch
When you receive emails from Microsoft about a new security update, look for any information they include about any issues they have identified. For instance, Microsoft may release a software patch that finally resolves a vulnerability missed by earlier updates.
4:Wait to patch – it won’t hurt, but it may hurt if you don’t
A good rule of thumb is to allow a week for testing after patches are released on Microsoft’s Patch Tuesday. Even if your business is too small to perform extensive testing, the extra week gives you time to review Microsoft and third-party resources about whether there could be negative consequences to the patch application. For server patching to key servers and other critical systems, you may want to even add an extra week of testing and reviewing.
5:Know why you’re doing it
Patch management is an essential part of the software world and it is important for the management as well as the admin team to understand its benefits for the organization as a whole. Communicating the essential nature of patch management will help to make it an integral part of IT activities.
6: Have a backout plan. Backups are the easiest option and they can also be used to mitigate other risks such as a virus infection or intrusion.
Term
Updating an ESXi/ESX host using VMware vCenter Update Manager
Definition
To set up frequency of the repository update:

Click Home.
Click the Update Manager icon.
Under the Configuration tab, click Patch Download Schedule.


To view the Patch Download scheduled task:
To set up frequency of the repository update:

Click Home.
Click the Update Manager icon.
Under the Configuration tab, click Patch Download Schedule.
To view the Patch Download scheduled task:
Click Home.
Click Scheduled Tasks.
Click VMware vCenter Update Manager Update Download.
To scan the ESX host for missing patches against the repository, right-click on the ESX host and click Scan for Updates > Patches and Extensions > Scan.
To remediate the missing patches to the ESX host:

Power off all virtual machines or vMotion them to a different ESX host.
Place the ESX host into maintenance mode. Right-click on the ESX host, select Enter Maintenance Mode, and click Yes.
Right-click on the ESX host and select Remediate > Critical Host Patches and Non-Critical Host Patches baselines and click Next.
Select which updates or patches to install, and click Next >Next > Finish.
Term
What Virtualization Technologies are you familiar with?
Definition
VMware Esxi, Citrix
Term
Definitions of Virtualization and Virtual Machines
Definition
Virtualization uses software to simulate computer hardware, creating a virtual system. Applications, servers, storage and networks can all be virtualized.
Term
Benefits of Virtual Machines
Definition
Cost savings
Easy provisioning
Increased productivity
Efficient DevOps
Environment-friendly IT operations
Term
Benefits of Virtual Machines over Containers
Definition
Full isolation means more security
Communications between the guest OS and the host go through the hypervisor and are thus more secure. Since containers remain in the host OS, they are more susceptible to security flaws in the OS.

Portability means that VMs can run old applications better
VMs are standalone and portable—they can be copied and cloned between hosts. To run old applications, you need only to have a guest OS that supports the application. In the case of containers, there is no chance of an older application running if it isn’t supported by the host OS.

Better resource allocation means better ability to run resource-intensive applications
VMs can run resource-intensive applications better since the host allocates them with their own resources. Containers share limited resources—the more containers there are in a host, the smaller the resources allotted to the container.

Versatility means the ability to allocate persistent storage
VMs can be set to store persistent data if required. Containers are ephemeral in nature. You need complex storage solutions for a container to handle persistent storage.
Term
Advantages of Cloud Computing
Definition
1: Saves Money
2. Scalable
4. Swift Deployment
5. Employees can work from any place at any time
6. Superior collaboration
Thanks to the cloud technology company staff stationed in different places can collaborate conveniently while maintaining high levels of security.
7. Superior backup
Term
What is vMotion?
Definition
VMware vSphere vMotion is a zero downtime live migration of workloads from one server to another. This capability is possible across vSwitches, Clusters, and even Clouds (depending of the vSphere edition that you have). During the workload migration, the application is still running and users continue to have access to the systems they need.
Term
what is a virtual Switch (vSwitch)?
Definition
A virtual switch (vSwitch) is a software application that allows communication between virtual machines. A vSwitch does more than just forward data packets, it intelligently directs the communication on a network by checking data packets before moving them to a destination.
Term
What is DRS (Distributed Resource Scheduler)in VMware?
Definition
VMware DRS refers to Distributed Resource Scheduler. It is the utility that would allocate the computing resources depending upon the specific workloads. The VMware DRS is an option that forms part of the virtualization suite which is usually referred to as VMware Infrastructure.
Some of the features that VMware DRS offers you include

It provides you with a dedicated infrastructural requirement in tune with the industry demands.
Server maintenance is entirely free of any downtime
With continuous monitoring, the energy efficiency is continually optimized for better performance.
The hardware parameters are controlled from a centralized resource.
The user hardware is optimized depending upon the changes in the conditions.
It ensures that the cooling efficiency is improved.Some of the features that VMware DRS offers you include

It provides you with a dedicated infrastructural requirement in tune with the industry demands.
Server maintenance is entirely free of any downtime
With continuous monitoring, the energy efficiency is continually optimized for better performance.
The hardware parameters are controlled from a centralized resource.
The user hardware is optimized depending upon the changes in the conditions.
It ensures that the cooling efficiency is improved.
Term
What is Enhanced vMotion Compatibility (EVC)?
Definition
EVC is a cluster level setting that supports virtual machine mobility within a cluster. When a virtual machine is moved to another cluster, either on-prem or in a hybrid cloud environment, it loses its EVC configuration depending on the destination environment.
Term
What is a Storage Area Network (SAN)?
Definition
A Storage Area Network (SAN) is a high-speed network of several interconnected devices operating as a data storage unit. SAN connects directly to a server, computer or host through fiber channel technology and creates a separate network dedicated to data transfers.
Term
What is Network Attached Storage (NAS)?
Definition
Network attached storage (NAS) is a device used exclusively as a single centralized storage location for multiple devices on a network. An NAS device connects directly to a switch or a router on an existing network, usually via ethernet, and contains multiple drives arranged in a RAID configuration for redundancy. Once connected, NAS allows data to be accessed as a shared folder by other computers and devices on the network.
Term
What is a full back up?
Definition
copies the entire data set
Term
what is an INCREMENTAL backup?
Definition
full backup + changes since the previous backup
Term
what is a DIFFERENTIAL backup?
Definition
full backup + changes since the full backup
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