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0x07. Networking basics #0

Resources

Tasks 📃

  • 0. OSI model

    • 0-OSI_model: Text file answering the following questions:
    • What is the OSI model?
      1. Set of specifications that network hardware manufacturers must respect
      2. The OSI model is a conceptual model that characterizes the communication functions of a telecommunication system without regard to their underlying internal structure and technology.
      3. The OSI model is a model that characterizes the communication functions of a telecommunication system with a strong regard for their underlying internal structure and technology.
    • How is the OSI model organized?
      1. Alphabetically
      2. From the lowest to the highest level
      3. Randomly

  • 1. Types of network

    • 1-types_of_network: Text file answering the following questions:
    • What type of network a computer in local is connected to?
      1. Internet
      2. WAN
      3. LAN
    • What type of network could connect an office in one building to another office in a building a few streets away?
      1. Internet
      2. WAN
      3. LAN
    • What network do you use when you browse www.google.com from your smartphone (not connected to the Wifi)?
      1. Internet
      2. WAN
      3. LAN

  • 2. MAC and IP address

    • 2-MAC_and_IP_address: Text file answering the following questions:
    • What is a MAC address?
      1. The name of a network interface
      2. The unique identifier of a network interface
      3. A network interface
    • What is an IP address?
      1. Is to devices connected to a network what postal address is to houses
      2. The unique identifier of a network interface
      3. Is a number that network devices use to connect to networks

  • 3. UDP and TCP

    • 3-UDP_and_TCP: Text file answering the following questions:
    • Which statement is correct for the TCP box:
      1. It is a protocol that is transferring data in a slow way but surely
      2. It is a protocol that is transferring data in a fast way and might loss data along in the process
    • Which statement is correct for the UDP box:
      1. It is a protocol that is transferring data in a slow way but surely
      2. It is a protocol that is transferring data in a fast way and might loss data along in the process
    • Which statement is correct for the TCP worker:
      1. Have you received boxes x, y, z?
      2. May I increase the rate at which I am sending you boxes?

  • 4. TCP and UDP ports

    • 4-TCP_and_UDP_ports: Bash script that displays listening ports.
    • That only shows listening sockets.
    • That shows the PID and name of the program to which each socket belongs.

  • 5. Is the host on the network

    • 5-is_the_host_on_the_network: Bash script that pings an IP address received as an argument 5 times.
    • Usage: 5-is_the_host_on_the_network {IP_ADDRESS}.