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
ipconfig
ifconfig (mac)
* The details include
* IP Address
* Subnet Mast
* Default Gateway
Ip Address
- Ip Address = Network Id/Address + Device/Host Id/Address
192.168.0.198
- 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
X.X.X.X - Each position is 8 bits which is called as octet
- Refer Here for 2 power table
- range of total ip v4 addresses
0.0.0.0 to 255.255.255.255
- Subnet mask is used to findout network id and host id
1 2 3 4
ip: 192.168.0.10
sm: 255.255.255.0
octects with 255 => 1.2.3
network id: 192.168
host id: 10
ip: 10.10.0.17
sm: 255.255.0.0
network id: 10.10
host id: 0.17
ip: 101.245.1.7
sm: 255.0.0.0
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.
