Network topologies, protocols and layers

• What is a node in a network?

  A device connected to a network
• How are nodes connected in a network?

  By wire or wirelessly
• What does the term topology refer to in networking?

  The arrangement of nodes in a network
• What are the common types of network topologies?

  • Bus topology: All nodes on a linear link
  • Star topology: Each node connected to a central switch
• What is a bus topology?

  Nodes connected along a linear link
• How does a star topology function?

  Each node connects to a central switch
• What is the purpose of encryption in networks?

  To send messages securely
• What is the significance of network layering?

  It organizes network protocols and functions
• What is the main function of a central switch in a star topology?

  To connect all nodes in the network
• Why is it important to understand different network topologies?

  To choose the best layout for specific needs
• How do bus and star topologies differ in their structure?

  Bus uses a linear link; star uses a central switch
• If a network has multiple devices connected directly to a central switch, what topology is it using?

  Star topology
• In a bus topology, what happens if the backbone fails?

  The entire network goes down
• What is the role of addressing in network protocols?

  To identify devices on the network
• What is the primary focus of network security?

  To protect data and resources on the network
• Why is it essential to have protocols in a network?

  They ensure proper communication between devices
• How does network security relate to encryption?

  Encryption is a method to enhance network security
• What is a star topology in networking?

  A network where each node connects to a central switch
• How do nodes connect in a star topology?

  All nodes connect indirectly through switches
• What is a node in a network?

  Any device connected to a network
• What role does a switch play in a star topology?

  It acts as a central point for communications
• What is a server in networking?

  A computer that holds data for sharing
• What happens if the switch in a star topology fails?

  The whole network fails as no communication occurs
• What are the advantages of using a star topology?

  • Each node is separately connected
  • Failure of one node does not affect others
  • New nodes can be added easily
  • Higher performance due to direct communication
• What are the disadvantages of using a star topology?

  • Whole network fails if the switch fails
  • Requires plenty of cable, which can be expensive
• Where are star topologies commonly found?

  In large organizations and home networks
• What is the function of a wireless access point (WAP)?

  It connects computers to a network using Wi-Fi
• What is the purpose of encryption in networking?

  To ensure messages are sent securely
• What is transmission media in networking?

  How data is carried physically from point A to B
• What does a router do in a network?

  It connects computers and network devices
• What is the significance of high performance in star topologies?

  It allows efficient communication between nodes
• What is a bus network?

  A type of network topology not covered here
• What are the key components of a star network?

  • Nodes: Devices connected to the network
  • Switch: Central device for communication
  • Server: Holds data for sharing
  • Transmission media: Physical connection method
• What is a bus topology in networking?

  A network layout with nodes on a linear link
• What connects all nodes in a bus topology?

  The backbone cable
• How is data transmitted in a bus topology?

  Data is sent up and down the backbone
• What is a node in a network?

  Any device connected to a network
• What is the definition of data in computing?

  Units of information
• What are the advantages of using a bus topology?

  Easy to connect nodes and less cabling
• What is a disadvantage of bus topology?

  The whole network fails if the backbone breaks