Comer, Chapter 1

Comer, Chapter 1

1. 5 aspects of networking

   • network applications and network programming
   • data communications
     • study of low-level mechanisms and technologies used to send information across a physical communication medium
     • physical media influence protocol design
   • packet switching and networking technologies
     • instead of forming a dedicated circuit, packet switching allows senders to transmit data over a shared network
     • divides data into blocks and includes information about the intended recipient in each packet
   • internetworking with TCP/IP
     • TCP/IP
       • internet protocol suite
       • goal: interconnect many packet switching technologies into a functioning whole
     • TCP/IP's relevance rests in its ability to subsume new technologies as they emerge
   • additional networking concepts and technologies
     • networks
       • public
         • users subscribe to network via service providers
       • private
         • large enterprise
         • small to medium business
         • consumer
         • small office / home office
     • interoperability
       • ability of two entities to communicate without any misunderstandings
     • TCP/IP stack
       • application
       • transport
       • internet
       • network interface
       • physical
     • OSI Seven Layer Reference Model
       • application
       • presentation
       • session
       • transport
       • network
       • data link
       • physical