Network

Network

1. Disadvantages

   • The cost: Network are expensive to set up.
   • Increase risk: Problems such as viruses can affect every computer on the network.
   • Network disruption: This occurs when malicious actors manipulate routes and deny access to certain parts of the network in order to slow down operations or disrupt communication between users on different parts of the network.
   • Scammers: As more and more people join the network, scammers often occur in this situation making people not want to join and get scammed.

2. Advantages

   • Storage capacity: Since you would share and reseave imformation and data, people would use the network to store information and save pieces of work.
   • Messaging others: We would now use the network to message and email other people to communicate around the world
   • Flexibility: Computer networks are flexible for several reasons. They provide users with the opportunity to explore anything they need to know
   • Security: Computer network provide security through authorization. Authorization is done via user id and password. So, it ensures that when we log in, we are only able to enter.

3. Type of network

   • Internet
   • LAN
   • Star network
   • Wide area network
   • Mobile network
   • WAN

4. Topologies

   • Bus topology: The network consists of a single cable that runs through the network. alll devices attach to the single cable
     • Advantages: Cheap to install ( only one wire needed)
     • Disadvantages: High chance of catastrophic flaiure. High chance of collisions. More computers mean the same cable that corrupt more collisions.
   • Ring topology: Computers are connected to each other in a ring. Communication only goes in one direction. Each computer receives a message, and if it is not the intend recipient, passes it on to the next computer.
     • Advantages: Cheap to install. No collisions only one computer is transmitting on each cable.
     • Disadvantages: High chance of catastrophic faliure. Difficult to add new computer.
   • Star topology: All computers are connected to a central switch. The switch directs the traffic to the appropiate computer.
     • Advantages: Fast, low chance of collisions. Easy to add new computer. Low chance of catastrophic faliure.
     • Disadvantages: Expensive. Faliure of the switch will take down the network.

5. IP Address

   • Computers on a network also need an address to identify them. When a computer is added to a network it is assigned an IP Address( Internet Protocol Address). The IP Address is unique value assigned to each computer on a network. Each IP Address on a network must be unique.