Explanation
you may optionally specify one or more security lists for the subnet to use (up to five). If you don't specify any, the subnet uses the cloud network's default security list. You canchange which security list the subnet uses at any time.
https://docs.cloud.oracle.com/iaas/Content/Network/Tasks/managingVCNs.htm

Explanation
You can permanently terminate (delete) instances that you no longer need.By default, the instance's boot volume is deleted when you terminate the instance, however you can preserve the boot volumeassociated with the instance, so that you can attach it to a different instance as a data volume, or use it to launch a new instance.
You can use a boot volume backup to create an instance or you can attach it to another instance as a data volume. Howeverbefore you can use a boot volume backup, you need to restore it to a boot volume.

Explanation
You can copy objects to other buckets in the same region and to buckets in other regions.
You must have the required access to both the source and destination buckets when performing an objectcopy.
You must also have permissions to manage objects in the source and destination buckets.
Because Object Storage is a regional service, you must authorize the Object Storage service for each region carrying out copy operations on your behalf. For example, you might authorize the Object Storage service in region US East (Ashburn) to manage objects on your behalf. Once you authorize the Object Storage service, you can copy an object stored in a US East (Ashburn) bucket to a bucket in another region.
You can use overwrite rules to control the copying of objects based on their entity tag (ETag) values.
Specify an existing target bucket for the copy request. The copy operation does not automatically create buckets.

Explanation
Oracle Cloud Infrastructure File Storage service provides a durable, scalable, secure,enterprise-grade network file system. You can connect to a File Storage service file system from any bare metal, virtual machine, or container instance in your Virtual Cloud Network (VCN). You can also access a file system from outside the VCN using OracleCloud Infrastructure FastConnect and Internet Protocol security (IPSec) virtual private network (VPN).
EXPORT
Exports control how NFS clients access file systems when they connect to a mount target. File systems are exported (made available) through mounttargets. Each mount target maintains an export set which contains one or many exports. A file system must have at least one export in one mount target in order for instances to mount the file system. The information used by an export includes the file system OCID, mount target OCID, export set OCID, export path, and client export options. For more information, see Managing Mount Targets.
EXPORT SET
Collection of one or more exports that control what filesystems the mount target exports using NFSv3 protocol and how those file systems are found using the NFS mount protocol. Each mount target has an export set. Each file system associated with the mount target has at least one export in the export set.
EXPORT PATH
A path that is specified when an export is created. It uniquely identifies the file system within the mount target, letting you associate up to 100 file systems to a single mount target. This path is unrelated to any path within the file system itself, or the client mount point path.
EXPORT OPTIONS
NFS export options are a set of parameters within the export that specify the level of access granted to NFS clients when they connect to a mount target. An NFS export options entry within an export defines access for a single IP address or CIDR block range. For more information, see Working with NFS Export Options.