Azure Classroom notes 20/Oct/2023

Networking

Scenario: I need 8 subnets of 30,000 devices each i.e. total 2,40,000 devices

• Network

2^n -2 ~= 240000
n = 18
N = 32 -18 = 14
10.0.0.0/14

• subnet

2^n - 2 ~= 30000
n = 15
N = 32 -15 = 17

• Subnetting

network sm: 11111111.11111100.00000000.00000000
subnet  sm: 11111111.11111111.10000000.00000000
--------------------------------------------------
                  10.000000yy.y00000000.
                  10.00000000.000000000. => 10.0.0.0/17
                  10.00000000.100000000. => 10.0.128.0/17
                  10.00000001.000000000. => 10.1.0.0/17
                  10.00000001.100000000. => 10.1.128.0/17
                  10.00000010.000000000. => 10.2.0.0/17
                  10.00000010.100000000. => 10.2.128.0/17
                  10.00000011.000000000. => 10.3.0.0/17
                  10.00000011.100000000. => 10.3.128.0/17

NAT

• Network Address Translation is required to provide internet access to private networks
  

DNS

• Domain Name System: The major responsibility of DNS Servers are to maintain records of Domains
• DNS Servers maintains records
  • Name to IP
  • Name to Name
• DNS Record Types: Refer Here
  
• Exercise: How can we acheive