ur browser is a application which uese aplication layer protocol which is HTTP But to formulate packet it needs to find out port and mac address and ip-address to which it wanst to sentd this request so that it can pass these information to lower layer protocol like TCP and IP so, now it sends a DNS query to find out the host name then it gets the IP address. as it is http requets application knows that host will be listening at port 80 all web-servers listens at 80 this layer only now it will send data to session layer which will create a new session. and all further communication to this server willl hapspen through this session. presentation data wont do much other than rerraning the data data comes to Transport layer for sendnig the packet it needs to know the destination port and destination mac-address. it have information of port which is 80. but n o idea abt mac-address. so it willl form a Arp query. as it know ip address it will broadcast this packet as nobody on your netwrok will have this mac-address. and touter will know that this is in some other network. so router in your network will respone with his mac-address. now tranport layer will form segment using these information (TCP protocol ) and will send it to network layer netwrok layer will find out the data size and will break the data into multiple datagrams if data that needs to be sent is large as maximum ethernet size allowed is 1546 bytes it will have squence number for packets so that destination can arrange the data in correct order as it already have infromation about , it has to do nothing much other than forming datagrma now datagram is ready. it will forward this frame to link layer link-layer will use either 802.1q (most probably) or FDDI or tokeRing it depends on your link communication if it is optical link it will use some other protocol if it is wireless 8802.11q i guess anyways it will send this packet to link layer which wil send the packet your router will get the packet router has rounit gtabel from which it will found out which link to forward liek this it will finally will reach to router to which detination host is attached
On Sat, Jul 3, 2010 at 9:58 AM, Thirupathi reddy Thumma < thirupathi.thu...@gmail.com> wrote: > hai friends sharad was generated an intrested question,iam also intrested > to know this,plz any one can analyze xplan us, > thank u > THIRUPATHI REDDY > M.Sc-MATHEMATICS,M.Tech(CSE) > ASST PROF IN MATHEM ATICS > AURORA,S ENG COLLEGE,HYD > > > On Sat, Jul 3, 2010 at 8:54 AM, sharad kumar <sharad20073...@gmail.com>wrote: > >> explain in detail what happens in all d 7 layers of osi model when u type >> www.google.com in ur browser >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algoge...@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algoge...@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
