Comrad

• World Wide Web 


  The leading information retrieval service of the internet
• BASIC PRINCIPLES IN COMPUTER RADIOLOGY


  • COMMUNICATION
  • USING
  • THE
  • INTERNET
  • NETWORK FUNDAMENTALS
• Computer Networks


  A group of two or more computers linked together
• Basic Network Components

  • Server
  • Client
  • Media
  • Network Adopter
  • Resources
  • User
  • Protocols

  
• BASIC TYPES OF COMPUTER NETWORKS


  • Local Area Network (LAN)
  • Wide Area Network (WAN)
• Local Area Network (LAN)


  Connects network devices over a relatively short distance
• Wide Area Network (WAN)


  Provides long distance transmission of data, voice, image, and video information over large geographical areas
• 2 Types of Computer Network Architecture

  • Peer to Peer (P2P)
  • Client – Server Architecture

  
• Peer to Peer (P2P)


  Each party has the same capabilities and any party can initiate communication
• Client – Server Architecture


  Computers in this model are either classified as server or clients
• Node


  Each client or server in the network may also be referred to as node
• Types of Computer Topology

  • Point to Point
  • Mesh Topology
  • Star Topology
  • Bus Topology
  • Ring Topology
  • Tree Topology
  • Hybrid Topology

  
• Network Bandwidth


  The amount of data can be transmitted between 2 points in the network in a set period of time
• Network Bandwidth


  Commonly expressed in bits per second
• Internet


  A global system of interconnected computer networks that use the standard internet protocol suite (TCP/IP) to serve several billion users worldwide
• Basic Application of Internet

  • Communication
  • Job Searches
  • Finding books and study material
  • Health and medicine
  • Travel
  • Entertainment
  • Shopping
  • Stock market updates
  • Research
• TCP/IP Applications


  The highest-level protocols within the TCP/IP protocol stack are Application Protocols. They communicate with applications on other internet hosts and are the user-visible interface to the TCP/IP protocol suite
• TCP/IP Applications


  • telnet
  • file transfer protocol (FTP)
  • simple mail transfer protocol (SMTP)