Update README.md

structure

Author: AlexanderHodicke

cloud-infrastructure/networking/gateways/README.md

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 # Networking Gateways
 
-Internet Gateway (IGW) is an optional gateway you can add to your VCN to enable direct connectivity to the internet
+Internet Gateway (IGW) is an optional gateway you can add to your VCN to enable direct connectivity to the internet.
 
-NAT Gateway(NAT) gives to your VCN  instances in a private subnet access to the internet
+NAT Gateway(NAT) gives your VCN  instances in a private subnet access to the internet.
 
-Dynamic Routing Gateway (DRG)  to connect to customer on-prem DC or other OCI regions
-DRG instances support following attachment types:
-    VCNs
-    Remote Peering Connections
-    Site-to-Site VPN IPSec tunnels
-    Oracle Cloud Infrastructure FastConnect Virtual Circuits
+Dynamic Routing Gateway (DRG)  to connect to customer on-prem DC or other OCI regions.
+
+DRG instances support the following attachment types:
 
- Service Gateway (SGW)  lets resources in your VCN privately access specific Oracle services, without exposing the data to an internet gateway or NAT
- 
-# Useful Links (Optional)
+ - VCNs
+ - Remote Peering Connections
+ - Site-to-Site VPN IPSec tunnels
+ - Oracle Cloud Infrastructure FastConnect Virtual Circuits
+    
+ Service Gateway (SGW)  lets resources in your VCN privately access specific Oracle services, without exposing the data to an internet gateway or NAT.
 
+ Reviewed: 06.02.2024
+ 
+# Useful Links
 
 - [DRG Video Tutorial](https://www.youtube.com/watch?v=ZXOYkkkQCEI)
 - [IGW Video Tutorial](https://www.youtube.com/watch?v=MtFNdZz20M4)
 - [NAT Video Tutorial](https://www.youtube.com/watch?v=dWEApK7DmdY)
 - [SGW Video Tutorial](https://www.youtube.com/watch?v=ivAxfoMYXlo)
 - [Introducing global connectivity and enhanced cloud networking with the dynamic routing gateway](https://blogs.oracle.com/cloud-infrastructure/post/introducing-global-connectivity-and-enhanced-cloud-networking-with-the-dynamic-routing-gateway)
 - [DRGv1 to DRGv2 ](https://www.ateam-oracle.com/post/migration-from-legacy-drg-to-enhanced-drg)
-- [DRG routing examples](https://www.ateam-oracle.com/post/basic-routing-scenarios-for-the-enhanced-drg
-)
+- [DRG routing examples](https://www.ateam-oracle.com/post/basic-routing-scenarios-for-the-enhanced-drg)
 - [NAT GW Usage](https://blogs.oracle.com/ateam/post/oci-network-firewall---nat-gateway-use-case)
 - [SG Usage](https://blogs.oracle.com/cloud-infrastructure/post/access-oracle-services-privately-with-a-service-gateway)
-
-
 
 # License