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What is the Internet? <ul><li>A network of network, joining many government university and private computers together and ...
Contd… <ul><li>Computers on internet have a unique address  - IP address  </li></ul><ul><li>Network of networks connected ...
Contd… <ul><li>The internet is a global network of computers and computer network communicating under one set of guideline...
How internet works? <ul><li>Protocols  –  standardized rules that define how  computers communicate and exchange  data </l...
Contd… <ul><li>URL  –  uniform naming scheme that   specifies unique address of   internet resources </li></ul><ul><li>Cli...
Contd… <ul><li>TCP/IP </li></ul><ul><ul><ul><li>The internet is a packet switching network that uses TCP/IP as its core pr...
Internet protocols <ul><li>HTTP  – for accessing and transmitting World Wide  Web documents </li></ul><ul><li>FTP  –  for ...
IP address <ul><li>IP address is a unique address assigned to each computer connected to the internet </li></ul><ul><li>It...
 
Contd… <ul><li>The first two numbers set designate the network </li></ul><ul><li>Third number set identifies local network...
IP VERSION <ul><li>There are two versions of IP:- </li></ul><ul><li>IPV4   e.g.  172.16.254.1 </li></ul><ul><li>IPV6  e.g....
TYPES OF ADDRESS <ul><li>Static Address </li></ul><ul><li>Dynamic Address </li></ul>
contd…. <ul><li>Static Address </li></ul><ul><li>manually input by network administrator. </li></ul><ul><li>manageable for...
Contd… <ul><li>Dynamic Address </li></ul><ul><li>assigned on LANs and broadband networks by DHCP servers. </li></ul><ul><l...
Various forms of IP Addresses  <ul><li>Decimal system with base 10. </li></ul><ul><li>Domain name system-By it own name. <...
Domain names <ul><li>Domain names are the alias or English language equivalent of computers IP addresses. </li></ul><ul><l...
Contd… <ul><li>  Domain names have two parts: </li></ul><ul><ul><ul><ul><li>First part names the host computer </li></ul><...
Top Level Domains <ul><ul><li>.com -  commercial/company site </li></ul></ul><ul><ul><li>edu/ac - educational/academic </l...
Additional Top level Domains <ul><li>.aero - restricted use by the air transportations  industry </li></ul><ul><li>.biz  -...
DNS Tree
Working of  D N S
 
References <ul><li>http://docs.google.com/viewer?a=v&q=cache:FnTcI0XJmEEJ:ncsi-net.ncsi.iisc.ernet.in/gsdl/collect/drtbrar...
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Internet

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about classes ,ip address &domain names

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Transcript of "Internet"

  1. 2. What is the Internet? <ul><li>A network of network, joining many government university and private computers together and providing an infrastructure for the use of E-mail, file archives, hypertext documents and other computational resources. </li></ul>
  2. 3. Contd… <ul><li>Computers on internet have a unique address - IP address </li></ul><ul><li>Network of networks connected using a common communication protocol (TCP/IP) </li></ul>
  3. 4. Contd… <ul><li>The internet is a global network of computers and computer network communicating under one set of guidelines, formally called Transmission Control Protocol/ Internet Protocol (TCP/IP) </li></ul>
  4. 5. How internet works? <ul><li>Protocols – standardized rules that define how computers communicate and exchange data </li></ul><ul><li>IP address – unique number used to identify computers on internet </li></ul><ul><li>Domain name – structured naming system to locate computers on the internet </li></ul>
  5. 6. Contd… <ul><li>URL – uniform naming scheme that specifies unique address of internet resources </li></ul><ul><li>Client and Server – computing architecture used by most internet services </li></ul>
  6. 7. Contd… <ul><li>TCP/IP </li></ul><ul><ul><ul><li>The internet is a packet switching network that uses TCP/IP as its core protocol </li></ul></ul></ul><ul><ul><ul><li>TCP/IP is a suite of protocols that govern network addresses and the organization and packaging of the information to be sent over the internet </li></ul></ul></ul><ul><ul><ul><ul><ul><li>TCP-flow control $ recovery of packets </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>IP – addressing and forwarding of individual packets </li></ul></ul></ul></ul></ul>
  7. 8. Internet protocols <ul><li>HTTP – for accessing and transmitting World Wide Web documents </li></ul><ul><li>FTP – for transferring files from one computer to another </li></ul><ul><li>Gopher Protocol – for accessing documents via Gopher menu </li></ul><ul><li>Telnet Protocol – allows users to login to a remote computer </li></ul><ul><li>SMTP (Simple Mail Transfer Protocol) for sending and managing electronic mails(e-mail) </li></ul>
  8. 9. IP address <ul><li>IP address is a unique address assigned to each computer connected to the internet </li></ul><ul><li>It is used by TCP/IP to route packets of information from sender to a location on the internet </li></ul><ul><li>IP address consist of four sets of numbers ranging from 0 to 255 </li></ul><ul><li>E.g. -249.7.13.53 </li></ul>
  9. 11. Contd… <ul><li>The first two numbers set designate the network </li></ul><ul><li>Third number set identifies local network </li></ul><ul><li>Fourth number set identifies the particular machine </li></ul>
  10. 12. IP VERSION <ul><li>There are two versions of IP:- </li></ul><ul><li>IPV4 e.g. 172.16.254.1 </li></ul><ul><li>IPV6 e.g. 2001:db8:0:1234:0:567:8:1 </li></ul>
  11. 13. TYPES OF ADDRESS <ul><li>Static Address </li></ul><ul><li>Dynamic Address </li></ul>
  12. 14. contd…. <ul><li>Static Address </li></ul><ul><li>manually input by network administrator. </li></ul><ul><li>manageable for small networks . </li></ul><ul><li>requires careful check to avoid duplication. </li></ul>
  13. 15. Contd… <ul><li>Dynamic Address </li></ul><ul><li>assigned on LANs and broadband networks by DHCP servers. </li></ul><ul><li>derived automatically from the range of addresses. </li></ul>
  14. 16. Various forms of IP Addresses <ul><li>Decimal system with base 10. </li></ul><ul><li>Domain name system-By it own name. </li></ul><ul><li>DWORD format - Decimal number system. </li></ul><ul><li>Octal system - Base 8. </li></ul><ul><li>Hexadecimal - Base 16. </li></ul><ul><li>A cross breed – Combination of above two. </li></ul>
  15. 17. Domain names <ul><li>Domain names are the alias or English language equivalent of computers IP addresses. </li></ul><ul><li>DNS allows the use of easier to remember domain names instead of IP addresses to locate computers on the internet </li></ul><ul><li>Domain Name resolvers scattered across the internet translate domain names into IP addresses </li></ul>
  16. 18. Contd… <ul><li> Domain names have two parts: </li></ul><ul><ul><ul><ul><li>First part names the host computer </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Second part identifies the top level domain </li></ul></ul></ul></ul><ul><ul><ul><li>Top level domains – identify the type of host </li></ul></ul></ul><ul><ul><ul><ul><li>Country Code Top Level Domains </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Generic Top Level Domain </li></ul></ul></ul></ul><ul><ul><ul><li>Domain names are used in URLs and email addresses </li></ul></ul></ul>
  17. 19. Top Level Domains <ul><ul><li>.com - commercial/company site </li></ul></ul><ul><ul><li>edu/ac - educational/academic </li></ul></ul><ul><ul><li>.gov - government site </li></ul></ul><ul><ul><li>.org - non profit organizations </li></ul></ul><ul><ul><li>.mil - military sites </li></ul></ul><ul><ul><li>.int - international organizations </li></ul></ul><ul><ul><li>.net - network providers </li></ul></ul>
  18. 20. Additional Top level Domains <ul><li>.aero - restricted use by the air transportations industry </li></ul><ul><li>.biz - general use by businesses </li></ul><ul><li>.coop - restricted use by cooperatives </li></ul><ul><li>.info - general use by both commercial and non commercial sites </li></ul><ul><li>.museum - restricted use by museums </li></ul><ul><li>.name - general use by individuals </li></ul><ul><li>.pro - restricted use by certified professionals </li></ul>
  19. 21. DNS Tree
  20. 22. Working of D N S
  21. 24. References <ul><li>http://docs.google.com/viewer?a=v&q=cache:FnTcI0XJmEEJ:ncsi-net.ncsi.iisc.ernet.in/gsdl/collect/drtbrara/index/assoc/HASH013c.dir/doc.pdf+how+internet+works+powerpoint+slides&hl=en&gl=in&pid=bl&srcid=ADGEESi6fDmD9nO_XELgDSjgiNFF3Duykwg-JBhmAfs0o3D0BR44y0Mp9lK56t49PQnasU2or-zdJ7DMP6Bh0ybYsjFDqdnhd4unAZ_nh9t5aQ5eLxSs9eFltpRyFFNYRbl1grJcMU0r&sig=AHIEtbSqRDv8P6M54mJUR1TOoTi_jhGnfw </li></ul><ul><li>http://docs.google.com/viewer?a=v&q=cache:9hD-3eQQs0UJ:www.computing.dcu.ie/~cgreene/ca106/notes/HowtheInternet.ppt+how+internet+works+powerpoint+slides&hl=en&gl=in&pid=bl&srcid=ADGEESi-9kJU4MrHQBXjDbsoW8L97ttwny5rNKVCwSjib91RS9I-yP0gMxGkelwQoE1hmtK9NoQMYSpnEQyKrf2TYzNe-sngCscU3gwQj37s1OaLYJQ2GkYFMDRpcAhm25BlWdgbB_tn&sig=AHIEtbScRWmHddKr60VvtR8vW0cMvVW_UQ </li></ul><ul><li>http://docs.google.com/viewer?a=v&q=cache:9xCE8oicMvUJ:www.doc.ic.ac.uk/~rcheung/teaching/1720/ppt/lecture02.ppt+how+internet+works+powerpoint+slides&hl=en&gl=in&pid=bl&srcid=ADGEESjB45G4E1OBmN894EB4Slc8hSF1oRl4y62hNQn-Sv8_35BJLLSvoalC6CjfGlB_Nlm7WyelgDpB49mixBOzJEY-zgcs4M4dNZOHuym3n3fDqbz9uiTTmQOo2wdgfV0_Phop-mMq&sig=AHIEtbTxpgdFbDf8S2NKXzuwPdcT6JcMQw </li></ul><ul><li>http://docs.google.com/viewer?a=v&q=cache:YPV-0ClI1p8J:www.ietf.org/proceedings/64/slides/protut-0/protut-0.ppt+how+dns+works+in+internet-ppt&hl=en&gl=in&pid=bl&srcid=ADGEESjucPpujwzUYPzw5T802Gd8hLeHC1B5NwNdf9ITHvYQijH62vItw9fEOwLuTYzmUdCcDkpfCSx72WXy4qD31-BJs0_eY9OpO3ZhxMARh3z5_dCpMMcbReTa6fiLb6KKbkBer4hk&sig=AHIEtbS-VeUoAoIYmRAHnVINugpQIiPPuQ </li></ul>
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