TLE REV

• Data Communication is the exchanging of facts and information
• Components of Data Communication:

  1. Sender
  2. Receiver
  3. Message
  4. Transmission medium
  5. Protocol
• What is the two types of transmission medium?

  • Wire Channels
  • Wireless Channel
• 
  

  Protocol is the set of rules or the security of the message
• Three types of Data Flow?

  • Simplex
  • Half-duplex
  • Full-duplex
• Simplex is a one-way communication and data flow
• An example of Simplex (Data Flow)?

  Mic and speaker
• Half-duplex, where both the sender and the receiver but not at the same time
• Example of Half-duplex (Data Flow)?


  Gmail or Walkie Talkie
• Full-duplex is where both the sender and receiver 
• Example of Full-duplex (Data Flow)?

  Video Call
• Message is the information you need in order for the sender and receiver to communicate
• Three types of wired channel?

  • Coaxial cable
  • Twisted Pair
  • Fiber Optics
• Two types of Twisted Pair?

  1. UTP - Unshielded twisted pair (average)
  2. STP - Shielded twisted pair (standard)
• For the Coaxial cable, it is a direct contact to the plug
• Computer Network is how your computer communicates with each other
• What is PAN?

  Personal Area Network
• What is LAN?

  Local Area Network
• What is WLAN?

  Wireless Local Area Network
• What is CAN?

  Campus Area Network?
• What is MAN?

  Metropolitan Area Network?
• This computer network is best for personal use only

  Personal Area Network
• This computer network is a combination of wired and wireless in a small area

  Local Area Network
• This computer network is exclusive for schools or campuses only

  Campus Area Network
• This computer network is the biggest and it can occupy a city

  Metropolitan Area Network
• Topology defines the plan or arrangement of the network
• This is used to connect devices to the internet

  Ethernet Cable, also known as LAN cable
• What are the Three types of Ports?

  • USB port
  • Power Supply or Cable
  • LAN / Ethernet port
• Star Topology a type of network topology in which all the devices or nodes are physically connected to a central node such as a router, switch, or hub
• Ring Topology is a network arrangement in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node
• Bus Topology is a network topology in which nodes are directly connected to a common half-duplex link 
• Mesh Topology is a local area network topology in which the infrastructure nodes connect directly, dynamically and non-hierarchically to as many other nodes as possible 
• Hierarchical Topology interconnects multiple groups that are located on the separate layers to form a larger network. 
• Fiber Optics is the most fastest cable and also the most expensive
• Wireless Local Area Network is a computer network that links two or more devices using wireless communication to form a local area network 
• Three examples of Wireless Channel?

  • Wifi
  • Internet
  • Bluetooth