Azure Classroom notes 17/Oct/2023

Networking for Cloud Computing

Concepts required

  • IPv4 ip addressing
  • subnetting
  • Routing
  • NAT
  • Gateways
  • DNS
  • Virtual Private Networks (VPN)
  • WAN (Wide Area Networks)

Networking Basics

  • A device/system connects to the network with the help of network interface.
  • Network interface gets an ip address which is allocated by DHCP (Dynamic Host Configuration Protocol)
  • In our home networks, the DHCP server is inside your router
  • DHCP maintains list of available ipaddresses and the whole range of network
  • Range of network is ipaddress range
  • open the command prompt or powershell
ifconfig (mac)

* The details include
* IP Address
* Subnet Mast
* Default Gateway

Ip Address

  • Ip Address = Network Id/Address + Device/Host Id/Address
  • subnet mask helps in seperating network id and hosgt id
  • ip v4 is an ip address which is 32 bit and represented in 4 octets
  • Each position is 8 bits which is called as octet
  • Refer Here for 2 power table
  • range of total ip v4 addresses to
  • Subnet mask is used to findout network id and host id
     1   2  3 4

octects with 255 => 1.2.3

network id: 192.168
host id: 10


network id: 10.10
host id: 0.17


nid: 101
host: 245.1.7
  • Two devices can communicate directly if the network id’s match
  • For connecting to device which is not part of your network then how ?

    • Router is a device in networking which can forward packet from one network to other network
  • When we try to connect to external devices router will have rules defined to forward packets.

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