Oracle Cloud Networking Common Terms and Usage

Oracle Cloud offers a range of networking services and features to help users build, manage, and secure their cloud infrastructure. Here are some key networking terms and their usage in Oracle Cloud:

Virtual Cloud Network (VCN): A VCN is a fundamental building block of Oracle Cloud networking. It is a logically isolated network within Oracle Cloud Infrastructure (OCI) that you can customize and manage. You can use VCNs to organize your cloud resources, control traffic, and define network connectivity.

Subnet: Subnets are subdivisions within a VCN. They help segregate resources within the VCN. You can create different subnets for different purposes, such as public-facing, private, or DMZ (Demilitarized Zone) subnets.

Security Lists: Security Lists act as virtual firewalls for your instances within a subnet. You can define rules in a security list to control inbound and outbound traffic to and from instances.

Route Tables: Route tables determine how traffic is routed within a VCN. You can create custom route tables to specify the paths that network traffic takes.

Internet Gateway (IGW): An Internet Gateway is a regional resource that allows traffic between your VCN and the public internet. It enables instances in a public subnet to access the internet and receive incoming internet traffic.

NAT Gateway: Network Address Translation (NAT) Gateway allows instances in a private subnet to initiate outbound internet connections while preventing incoming connections from the internet. This enhances security for private resources.

Dynamic Routing Gateway (DRG): A DRG is a virtual router that provides a connection between your VCN and your on-premises network or other VCNs in different regions. It's used for creating site-to-site VPNs or FastConnect connections.

FastConnect: Oracle Cloud FastConnect is a dedicated network connection service that allows you to establish a private, high-bandwidth connection between your on-premises data center and Oracle Cloud infrastructure.

VPN (Virtual Private Network): Oracle Cloud supports site-to-site VPNs, allowing secure communication between your on-premises network and your VCN over the public internet.

Load Balancer: Oracle Cloud offers a load balancing service that distributes incoming traffic across multiple instances to ensure high availability and scalability of applications.

DNS (Domain Name System): Oracle Cloud provides a DNS service for managing domain names and resolving them to IP addresses. You can create and manage DNS zones and records.

Security Rules: Security rules are used to define what traffic is allowed or denied in your network. You can use these rules in security lists, route tables, and other networking components to control traffic flow.

Private IP: Each Oracle Cloud instance is assigned one or more private IP addresses. These are used for internal communication within the VCN.

Public IP: Public IPs are used for instances in public subnets to communicate with the public internet. You can associate public IPs with specific instances.

Network Security Groups: Network Security Groups (NSGs) allow you to define security rules at the subnet level, providing an additional layer of security for your resources.

Peering: VCN peering allows you to connect two VCNs within the same region, enabling communication between resources in different VCNs as if they were in the same network.

These are some of the fundamental networking terms and their usage in Oracle Cloud. Oracle Cloud's networking services provide the flexibility and control needed to build secure and scalable cloud infrastructure.