Podcast
Questions and Answers
What are commonly referred to as end devices within a computer network?
What are commonly referred to as end devices within a computer network?
Which term is synonymous with host devices in networking?
Which term is synonymous with host devices in networking?
In a typical computer network, which of the following is an example of a host device?
In a typical computer network, which of the following is an example of a host device?
What are host devices primarily used for in a network?
What are host devices primarily used for in a network?
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Which of the following is least likely to be considered a host device in networking?
Which of the following is least likely to be considered a host device in networking?
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What is the first step in the process of transmitting optical signals?
What is the first step in the process of transmitting optical signals?
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What type of cable is used to connect the converted signals to a router?
What type of cable is used to connect the converted signals to a router?
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What factor influences the choice of connection for optical signals?
What factor influences the choice of connection for optical signals?
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Which of the following is NOT mentioned as a factor affecting connection choices?
Which of the following is NOT mentioned as a factor affecting connection choices?
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What happens after optical signals are converted to electrical signals?
What happens after optical signals are converted to electrical signals?
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What is the primary purpose of HTTP?
What is the primary purpose of HTTP?
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What does HTTPS provide in addition to the features of HTTP?
What does HTTPS provide in addition to the features of HTTP?
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Which protocols are associated with HTTPS for security?
Which protocols are associated with HTTPS for security?
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Which of the following is NOT a function of HTTP?
Which of the following is NOT a function of HTTP?
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Why is HTTPS preferred over HTTP for sensitive data exchanges?
Why is HTTPS preferred over HTTP for sensitive data exchanges?
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What is one advantage of fiber-optic cable over copper cable?
What is one advantage of fiber-optic cable over copper cable?
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Which of the following statements is true about fiber-optic cables?
Which of the following statements is true about fiber-optic cables?
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Compared to cables made of metals, fiber-optic cables have:
Compared to cables made of metals, fiber-optic cables have:
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What characteristic of fiber-optic cables allows them to transport signals effectively over long distances?
What characteristic of fiber-optic cables allows them to transport signals effectively over long distances?
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Why might someone choose fiber-optic cable over metal cable for a network installation?
Why might someone choose fiber-optic cable over metal cable for a network installation?
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What is the primary function of a hub in a network?
What is the primary function of a hub in a network?
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How does a hub affect the reach of a network?
How does a hub affect the reach of a network?
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What happens to the data received by a hub?
What happens to the data received by a hub?
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Which statement accurately describes a hub's operation?
Which statement accurately describes a hub's operation?
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Which of the following best differentiates a hub from a switch?
Which of the following best differentiates a hub from a switch?
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What does TCP transport primarily resemble?
What does TCP transport primarily resemble?
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Which of the following is NOT a characteristic of TCP?
Which of the following is NOT a characteristic of TCP?
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What is a key feature of TCP that helps track data?
What is a key feature of TCP that helps track data?
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In what way is TCP transport different from UDP?
In what way is TCP transport different from UDP?
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Which statement best describes the nature of TCP delivery?
Which statement best describes the nature of TCP delivery?
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Study Notes
Network Types and Concepts
- Networks are systems formed by links that connect devices and users.
- Host devices (end devices) are at the edge of a network, e.g., desktop computers, laptops, tablets, smartphones, printers, cameras, and IP phones.
- Intermediary devices facilitate data flow between host devices, e.g., switches, routers, wireless routers, and modems.
- Switches connect multiple devices within a network.
- Routers forward traffic between networks.
- Wireless routers enable connection for multiple wireless devices and may include switches for wired hosts.
- Access points extend the reach of a wireless network by connecting to a wireless router.
- Modems connect homes or small offices to the internet.
- Network media carries communication across a network. Examples include LAN media, WAN media, wireless media, network cloud, and internet.
- A personal area network (PAN) connects devices within the range of an individual.
- A local area network (LAN) extends within a small geographical area.
- A virtual LAN (VLAN) segments ports on a single switch.
- A wireless LAN (WLAN) connects devices wirelessly in a small area.
- A wireless mesh network (WMN) extends the reach of a WLAN. WMNs use multiple access points.
- A metropolitan area Network (MAN) spans a large campus or a city.
- A wide area network (WAN) connects networks in geographically distinct locations.
- Virtual private networks (VPNs) securely connect to another network.
Network Topologies
- PAN—Connects devices within the range of an individual
- LAN—Connects devices within a small area
- VLAN—Segment ports on a single switch.
- WLAN—Wireless network of devices in a small geographic area
- WMN—Wireless network for extending a WLAN by using multiple access points
- MAN—Network that spans across a large area, such as a city
- WAN—Network that encompasses multiple networks in large geographic regions and is often used by corporations
Internet Connection Types
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Analog Telephone: Uses analog modems on standard voice telephone lines for internet access.
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Integrated Services Digital Network (ISDN): Uses multiple channels for different services and is a type of broadband.
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Broadband: Uses multiple frequencies to send multiple signals simultaneously, allowing for multiple services. Examples include cable, DSL, ISDN, satellite, and cellular.
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Cable: uses coaxial cable lines to carry cable television.
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DSL: Uses existing telephone lines to provide internet access.
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Fiber: Uses light to transmit data over fiber optic cables. Offers high bandwidth for faster speeds.
Network Protocols and Standards
- TCP/IP Model layers prepare data for network transmission.
- TCP and UDP are important protocols, with TCP ensuring data arrival and UDP being faster but less reliable.
- Application layer protocols use TCP or UDP port numbers to manage application conversations.
- Well-known port numbers assigned to specific applications, such as 80 (HTTP) and 443 (HTTPS).
- Wireless protocols, like 802.11ax (Wi-Fi 6), Bluetooth, NFC, and RFID, support short-range communication and connectivity.
- Zigbee and Z-Wave are smart home standards for creating wireless mesh networks.
- Cellular generations (1G-6G) have evolved to improve data speeds.
Network Devices
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Network Interface Card (NIC): Provides the physical connection to the network for the PC.
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Repeaters: Regenerate weak signals, extending the distance a signal travels.
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Bridges: Divide LANs into segments, filtering network traffic.
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Hubs: Send data to all connected ports.
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Switches: Microsegment a LAN, only sending data to the intended device.
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Wireless Access Points (AP): Provide network access to wireless devices.
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Routers: Connect different networks, managing traffic between segments, and functioning as gateways to outside networks.
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Firewalls: Protect data and equipment from unauthorized access.
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Intrusion Detection Systems (IDS): Monitor Network traffic; passively detect possible attacks
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Intrusion Prevention Systems (IPS): Actively monitor Network traffic, blocking malicious traffic as it is detected.
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Unified Threat Management Systems (UTMs): Provides several security services in one appliance.
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Endpoint Management Server: Monitors end devices, restricting access if needed.
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DNS (Domain Name System): translates domain names to IP addresses.
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DHCP (Dynamic Host Configuration Protocol): Automatically assigns IP addresses to devices on a network.
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Print Servers: Allow users to print to a single printer.
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File Servers: Used by servers for users to access files on the network.
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Web Servers: Provide access to web pages.
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Mail Servers: Handle email messages.
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Proxy Servers: Act as intermediaries between client computers and servers.
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Syslog Servers: Manage logging messages from networking devices.
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Load Balancers: Distributes network traffic across multiple servers to prevent overload.
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Cloud-based Network Controllers: Centralize management of network devices.
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Patch Panel: Collects incoming cable runs.
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Description
Test your knowledge of various network types and their components. This quiz covers host devices, intermediary devices, and network media essential for connecting devices. Gain a deeper understanding of how networks function and the roles different devices play.
