Traffic Analysis on TCP/IP

Traffic Analysis on TCP/IP

1. Computer Network

   • (2, ... N-1) Computers Communications with Sharing Messages
     • Network Server
       • Services Provider
         • Sendmail
         • Postfix
     • Client Server
       • Consume Serivces
         • Mozilla Thunderbird
         • Outlook
   • Protocol Family
     • TCP/IP
       • Objective
         • Provide a Communication between hosts without problems
           • If the traffic has a break in one router, the TCP/IP Protocol search a new route for information deliver
     • NetBIOS
       • Objective
         • Quickly connect simple network
           • Any people without any knowledge of networks could build a simple network with small host numbers
           • Problems
             • Using the protocol in large scale
               • Because that as create for using in small networks
   • Data Transmission
     • Flow Type
       • Simplex
         • One side only send and other side only receive
       • Half Duplex
         • The communication sides could send and receive but not a simultaneously
       • Full Duplex
         • The communication sides could send and receive simultaneously
     • Diffusion Type
       • Unicast
         • One host can be send only a other unique host
       • Multicast
         • The host can be send to multiples hosts (group of hosts)
       • Broadcast
         • The host send to all hosts of network
       • Anycast
         • Your send method is equivalent a unicast, but the signal Anycast is sended to group of hosts and only ONE host is receive and response this request (the host wich is closer).
   • Classification
     • Coverage Area
       • Local Area Network (LAN)
         • Organizations, house network, etc. The network connect maximum area of 5~10 kilometers. 
       • Metropolitan Area Network (MAN)
         • Coverage maximum of 50 ~ 100 kilometers. Could be used as a city network, but don't only this, because MAN could connect city prefectures
       • Wide Are Network (WAN)
         • Network without coverage. This have a large scale.
     • Connectivity
       • Intranet
         • Schools, Enterprises netowork. This network could distributed at others countries, but only accessed by the internal hosts.
       • Extranet
         • Have a Intranet idea, but you internal informations could be access by external users, but this hosts are selected (i.e especific hosts)
       • internet
         • Has a connections of Intranet, Extranet or External users.
       • Internet
         • Word Wide Web
   • Organizations
     • Internet Engineering Task Force (IETF)
       • Community that studies the evolution of network architecture
         • Rules to best way to use Internet
         • Analysis any factors of RFCs
         • ...
     • Internet Assigned Numbers Authority (IANA)
       • Responsable of multiple assumpts of Internet
         • Coordinate Root DNS
         • Coordinate Distribution of IPv4/IPv6
         • Coordinate association of services network and port numbers
         • Coordinate timezones database
     • Instutute of Eletrical and Eletronics Engineers (IEEE)
       • Largest professional study group aiming to advance technology
         • Define hardware patterns and yours protocols
         • ...