9.2.2 Types of networks

• What is a network defined as?

  Computers connected by channels
• Networks enable the sharing of resources and data between connected devices.
• Networks can range from small home setups to large organizational networks and the global internet
• What do network topologies describe?

  Device arrangement in a network
• In a star topology, each device is connected to a central hub
• A star topology is fault tolerant because the failure of one device does not affect the entire network.
• What is the main cable in a bus topology called?

  Bus
• A bus topology is easy to set up but has a single point of failure
• How are devices connected in a ring topology?

  Circular fashion
• A ring topology provides efficient data flow but is difficult to scale.
• In a mesh topology, every device is connected to every other device
• What is a key advantage of a mesh topology?

  High redundancy
• Match the network type with its geographical scope:

  Personal Area Network (PAN) ↔️ Small area around an individual

  Local Area Network (LAN) ↔️ Limited area such as a home

  Metropolitan Area Network (MAN) ↔️ Spans a city

  Wide Area Network (WAN) ↔️ Covers countries or continents
• What type of connection is commonly used in a PAN?

  Wireless
• A LAN typically uses Ethernet or Wi-Fi
• A MAN provides internet services to a city or metropolitan area.
• What is the geographical scope of a WAN?

  Countries or continents
• What is the purpose of network topologies?

  Describe device arrangement
• In a star topology, devices are connected to a central hub
• A bus topology is easy to troubleshoot.

  False
• Arrange the following network topologies from least to most redundant:

  1️⃣ Bus Topology

  2️⃣ Ring Topology

  3️⃣ Star Topology

  4️⃣ Mesh Topology
• The main cable in a bus topology is called the bus
• What is a key advantage of a ring topology?

  Efficient data flow
• Match the network type with its geographical scope:

  PAN ↔️ Small area around an individual

  LAN ↔️ Limited area such as a home

  MAN ↔️ City or metropolitan area

  WAN ↔️ Large geographical areas
• A LAN connects devices within a limited area such as a school or office.
• What type of network is commonly used for city-wide Wi-Fi?

  MAN
• Malicious software that disrupts network operations is called malware
• Phishing involves deceiving users to reveal sensitive information.
• Arrange the following authentication methods from least to most secure:

  1️⃣ Passwords

  2️⃣ Biometric Authentication

  3️⃣ Multi-Factor Authentication
• Match the access control model with its description:

  MAC ↔️ Centralized control, highly secure

  DAC ↔️ User-based control, flexible

  RBAC ↔️ Role-based control, efficient
• A router forwards data packets between networks
• What device directs data packets within a network?

  Switch
• Network operating systems manage network operations and resources
• A network enables the sharing of resources and data between devices.
• What is a key advantage of a star topology in terms of fault tolerance?

  Central fault isolation
• In a bus topology, all devices are connected to a single main cable
• Which topology has devices connected in a circular fashion?

  Ring
• A mesh topology offers high redundancy at the cost of complex setup and high costs.
• Network topologies describe the arrangement of devices in a network.
• What is the central device in a star topology?

  Hub or switch