Networking (On-Premise)

• Organization (LearningThoughts) with Single Site
• Organization (Learning Thoughts) with multiple sites
• In both of these organization owns the network

Networking with Amazon Cloud added

• When we add cloud then we create virtual infrastructure with virtual networks

Different Applications in Organization (Learning Thoughts)

• LT has the following kinds of applications
  • Applications accessed over internet by customers (https://commerce.lt.com)
  • Applications acceses over intranet by employees (https://internal.payroll.lt.com)
• LT wants to run internet apps on cloud, how would i design it?
• LT wants to run intranet apps on cloud, how would i design it?
• How would LT use the networking benifits of AWS?
• Lets take one ecommerce application developed by LT which has to run on cloud (as of now it is on premise)
• Now you are asked to create a network design to run LT commerce application on AWS Cloud

Solution for designing the network on AWS

• Topics to be clear with for internet applications
  • IP Address
  • Subnets
  • Virtual Network
  • AWS Infrastructure (Region & AZ)
  • Public and Private networks
  • Basic Networking
    • TCP/OSI
    • Routing
    • NAT
    • DHCP
    • DNS
• Topics to be clear with for intranet applications
  • VPN’s (Virtual Private Network)
  • Hybrid Cloud
• Topics for leveraging advantages
  • Load balancing

Our approach

1. Lets start from basic networking
2. Lets understand home internet connection
   • Basic connection:
   • What happens when wifi router is down (Will there be network)?
     • Network will not exist
   • What happens when modem is down?
     • yes we would have network but it will not connect to internet
   • Is your home network public or private?
     • Home networks are private
   • Then how is private network connecting to google or any other site on internet?
     • Your requests to google.com are forwarded to ISP (Internet Service Provider)