Networks

Networks

1. TYPES OF NETWORKS

   • LAN
     • LOCAL AREA NETWORK
     • SINGLE GEOGRAPHICAL AREA
   • WAN
     • WIDE AREA NETWORK
     • MULTIPLE GEOGRAPHICAL AREA

2. ADVANTAGES OF A NETWORK

   • CAN SHARE FILES
     • CAN ACCESS ALL THE SAME FILES ON EVERY COMPUTER
   • SHARE RESOURCES
     • SUCH AS PRINTERS AND INTERNET CONNECTION
   • SHARE LOGINS
     • USERNAME AND PASSWORD CAN BE USED ON EVERY COMPUTER

3. DISADVANTAGES OF A NETWORK

   • EXPENSIVE
     • EXTRA HARD WEAR
   • MORE ROOM FOR ERROR
     • IF SOMETHING GOES WRONG IT CAN AFFECT THE WHOLE NETWORK
   • DIFFICULT
     • REQUIRES A TECNICAL

4. NETWORK TOPOLOGY

   • BUS
     • ADVANTAGES
       • CHEAP TO INSTALL
     • DISADVANTAGES
       • COLLISIONS
       • HIGH CHANCE OF CATASTROPHIC FAILUER
       • SLOWS DOWN AS MORE COMPUTERS ADDED
   • STAR
     • DISADVANTAGES
       • EXPENSIVE
       • DEPENDS ON ONE SWITCH
     • ADVANTAGES
       • LOW CHANCE OF FAILUER
       • NO COLLISIONS
   • RING
     • ADVANTAGES
       • CHEAP TO INSTALL
       • NO COLLISIONS
     • DISADVANTAGES
       • HIGH CHANCE OF CATASTROPHIC FAILURE
       • DIFFICULT TO EXPAND

5. NETWORK ADRESSING

   • AN IP ADRESS IS A UNIQUE VALUE ASSIGNED TO EVERY COMPUTER ON A NETWORK, USED TO IDENTIFY IT
   • MESSAGES ON A NETWORK HAVE AN IP ADRESS ATTACED, WHICH IS HOW A COMPUTER KNOWS WHETHER OR NOT TO KEEP THE MESSAGE