Wednesday, 30 May 2012

8th entry

today is the last week of our class, so that's mean that no more post after this :( it is true??
I'am not sure actually hehe....
so today we learn about


*hierarchy of network
  • from a single computer to LAN
  • from LAN to ISP
  • from ISP to WWW
*in order to connect yourself, you need
  • computer
  • web browser
  • internet acces
--however the policy is quite complicated

  • internet standard protocol that provide a common layer over dissimilar network
  • to move packet among 'host' computer through gateways
  • every computer assign unique IP address
  • IP address consist of 32 bits (shows as 4 octets of number from 0-225 represented in decimal form instead of binary)
        1 octet = 8 bits
        4 octet = 32 bits
        1 IP     = 32 bits
  • IP address consist of 2 parts:
  1.  identify the networks
  2. identify the node/host
  • class of address determines which parts belongs to the networks address and which part belongs to node.
  • all node on a given network share the same network prefixes but must have a unique host number
  • binary address start with 0
  • decimal no. are from 2 to 126
  • the first 8 bits (the first octets) identify the networks and the remaining 24 bits indicate the host within the network
  • exp:
  • binary address starts with 10
  • decimal no. are from 128 to 191
  • the no. 127 is reserved for loopback and is used for internal testing for local machine
  • the first 16 bits (first 2 octets) identify the networks and the remaining 16 bits indicate the host
  • exp: 168.212. 226.204
  • binary address starts with 110
  • decimal no. are from 192 to 223
  • the first 24 bits (first 3 octets)  identify the networks
  • binary address starts with 1110
  • decimal no. are from 224 to 239
  • used to support multicasting
  • binary address starts 1111
  • decimal no. are from240 to 254
  • used for experimentation
  • internet service that translate domain names likes into numerical IP address likes
  • it more easy to remember
  • is a company that offer its customer access to the internet
  • connects to its customer using a data transmission technology 
  • may provide Internet e-mail accounts to user which allow them to communicate with one another by sending and receiving electronic messages through their ISPs' server.
  • HTTP stand for Hypertext Transfer Protocol
  • set of rule for transferring files such as text, graphic images, sound, video and other multimedia files on the World Wide Web (WWW)
  •  HTTP is an aplication protocol that runs on top of the TCP/IP suite of protocols (the foundation protocols for the internet)
bye2 that's all for today
see yaa (^-^)

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