Summary and Quiz
Let’s summarize the chapter by reviewing the important concepts.
In this chapter, we studied the important concepts related to networking and networking in AWS. We refreshed networking concepts, studied how VPC works, and what are its functionalities and components. We explored Internet Gateway, route table, NAT Gateway, and connectivity options.
We studied the difference between the security groups and network access control lists (NACLs) and saw how they work by exploiting a use case.
Key takeaways
Below are the important concepts and key takeaways from this chapter.
Fundamentals of networking
Internet Protocol (IP): This defines a set of rules to address and route traffic on the internet.
IPv4 and IPv6: IPv4 is a 32-bit address represented in four octets, while IPv6 uses a 128-bit address represented in hexadecimal notation, providing a much larger address space.
Classful IPv4 addressing: IPv4 addresses are divided into network and host parts, with Class A, B, and C addresses defining different network and host bits combinations.
Limitations of classful addressing: Classful addressing has limitations such as inefficient IP allocation and limited network design flexibility.
Subnet mask: A subnet mask is a binary representation indicating the network and host portions of an IP address, used by routers to determine network boundaries.
Classless Inter-Domain Routing (CIDR): CIDR addresses the limitations of classful addressing by allowing variable-length subnet masks (VLSM) and more flexible IP allocations.
CIDR notation: This includes the IP block followed by a slash and the number of selected network part bits, allowing for efficient network allocation and routing.
Subnetting: This enables dividing large network address spaces into smaller subnetworks, improving network routing efficiency.
Virtual Private Cloud
VPCs are the foundation of AWS infrastructure, providing isolated, secure, and customizable cloud spaces. Understanding VPCs is crucial for creating safe, expandable, and tailored cloud environments.
Key components of VPC: Subnets, route tables, Internet Gateways, and Elastic IP addresses are the key ...