Network Technicalities

Network Technicalities

1. Protocols

   • A set of rules that cover data communications
   • Transmission Control Protocol/Internet Protocol has become the de facto standard for data transmission over the internet
   • Hosts are computer systems that are accessed remotely and hold data such as web servers
     • TCP is concerned with the connections of hosts, not the nature of data
   • Packets are collections of data forming part of a message (constructed according to rules laid down by the protocol)
     • Contains standard fields like: protocol, checksum, total length, address, time to live, packet number, data
     • IP is concerned with construction of packets
     • Packet switching is when packets from a particular message take different routes according to availability and traffic conditions (forwarded from one router to the next) and assembled at the receiving end
       • Improves reliability if one route is down or congested, another can be found

2. Adressing

   • IP
   • MAC

3. Network security

4. The internet

5. Internet File Standards

   • ompression