MODULE 6: Virtual Networking & Cloud Storage Fundamentals
This module answers two big questions:
How do virtual machines communicate with each other and the internet?
Where is data stored in cloud environments?
Understanding virtual networking and cloud storage is essential to build, secure, and manage modern cloud systems.
What You Will Learn in This Module
By the end of Module 6, you will be able to:
- Understand how virtual networking works
- Explain virtual networks, subnets, and routing
- Understand how cloud storage is designed
- Differentiate block, file, and object storage
- Understand performance, availability, and cost basics
- Explain real-world cloud networking and storage use cases
Lesson 1: What Is Virtual Networking?
Simple Explanation
Virtual networking allows virtual machines to communicate:
- With each other
- With on-premise networks
- With the internet
All without physical cables.
It is built using software-defined networking (SDN).
Real-World Analogy
Think of:
- Roads → virtual networks
- Lanes → subnets
- Traffic rules → security rules
Lesson 2: Virtual Networks & Subnets
Virtual Network (VNet / VPC)
A virtual network is an isolated network environment in the cloud.
It allows:
- Private IP addressing
- Network isolation
- Controlled access
Subnets
A subnet is a smaller network inside a virtual network.
Used to:
- Separate workloads
- Improve security
- Control traffic flow
Example:
- Web subnet
- Application subnet
- Database subnet
Lesson 3: Internet Access, Gateways & Routing
Internet Gateway
Allows VMs to access:
- The internet
- External services
Without it:
- VM stays private
Routing Tables
Control:
- Where network traffic goes
- Which subnet can talk to which network
Routing ensures traffic goes to the right destination.
Lesson 4: Network Security Basics (Intro Level)
Security Groups / Firewall Rules
- Control inbound and outbound traffic
- Allow or deny specific ports
- Applied at VM or subnet level
Example:
- Allow HTTP (80)
- Allow HTTPS (443)
- Block everything else
Network Segmentation
Separating workloads reduces:
- Attack surface
- Lateral movement
- Accidental exposure
Lesson 5: Cloud Storage Fundamentals
What Is Cloud Storage?
Cloud storage is data storage delivered:
- Over the internet
- On-demand
- With high availability
No physical disks needed by the user.
Lesson 6: Block Storage
What Is Block Storage?
Block storage provides:
- Raw storage volumes
- Attached to virtual machines
Used like:
- A hard drive inside a VM
Common Use Cases
- Operating systems
- Databases
- Enterprise applications
Lesson 7: File Storage
What Is File Storage?
File storage provides:
- Shared folders
- File-level access
Used like:
- Network file share
Common Use Cases
- Shared documents
- Team collaboration
- Application shared data
Lesson 8: Object Storage
What Is Object Storage?
Object storage stores data as:
- Objects (files + metadata)
Used for:
- Massive scale
- High durability
Common Use Cases
- Backups
- Media files
- Logs
- Static website content
Lesson 9: Storage Performance, Availability & Cost
Performance
- Faster storage = higher cost
- Choose based on workload
Availability
- Replication across zones
- Built-in redundancy
Cost
- Pay per GB
- Pay for usage
- Optimize storage type
Lesson 10: Real-World Networking & Storage Design Example
Example setup:
- Public subnet → web servers
- Private subnet → database
- Security rules → controlled access
- Block storage → OS & DB
- Object storage → backups
This is a standard modern cloud architecture.
MODULE 6 SUMMARIES
By completing Module 6, you now understand:
- How virtual networking works
- Virtual networks, subnets, and routing
- Cloud firewall and segmentation basics
- Block, file, and object storage
- Performance, availability, and cost concepts
- How real cloud systems are designed
This module answers the question:
“How do cloud systems connect and store data securely?”