Index

COMPUTER NETWORKING

  1. INTRO
    1. TCP/IP Five Layer Model
    2. NETWORKING DEVICES
    3. PHYSICAL LAYER
    4. DATALINK LAYER
  2. NETWORK LAYER
    1. IP
    2. SUBNET
    3. ROUTING
  3. TRANSPORT & APPLICATION LAYER
    1. TRANSPORT LAYER
    2. CONTROL FLAGS
    3. APPLICATION LAYER
    4. ALL TOGETHER
  4. NETWORK SERVICES
    1. DNS - NAMES RESOLUTION
    2. DHCP
    3. NAT
    4. VPN
  5. CONNECTING TO INTERNET
    1. BROADBAND
    2. WAN
    3. WIRELESS NETWORKING
  6. TROUBLESHOOTING
  7. MORE ABOUT
    1. DNS
    2. IPv6
    3. CLOUD

IP

IP addresses : 32 bit long numbers
IP addresses belong to the network

Dynamic Host Configuration protocol : resolves ip dynamically
Dynamic IP address : clients
Static IP address : Network devices / servers

IP datagram : A highly structuredseries of firlds that are strictly defined.
images/4-1.png

https://www.informit.com/articles/article.aspx?p=29578&seqNum=5

images/4-2.png


Address Class System : A way of defining how the global IP address space is split up.
1. Class A : First octet for network id ,rest for host id
2. Class B : First two octet for network id ,rest for host id
3. Class C : First three octet for network id ,rest for host id

images/4-3.png

CIDR : Classless inter-domain routing ...newly coming up

Address Resolution Protocol: A protocol used to discover the hardware address of a node with a certain IP address.
ARP table --→ A list of IP addresses and MAC addresses associated with devices