Questions and Answers
What is a common characteristic of satellite internet connectivity mentioned in the text?
Requires a satellite dish to communicate with a satellite in space
Why is satellite connectivity described as a non-terrestrial communication method?
It involves communicating with devices that are positioned in low Earth orbit.
What is a significant challenge associated with using satellite internet connectivity?
Minimal latency as packets travel to and from the satellite
Why might someone opt for satellite connectivity over terrestrial networking according to the text?
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What technology is commonly used today to provide ethernet connections between locations in the same city?
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Why are metropolitan area networks (MANs) common for governments?
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What type of network provides block level access to centralized storage facilities?
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Why do Storage Area Networks (SANs) require very high bandwidth?
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What technology is commonly used for wireless networks within a building?
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How can you extend the range of a Wireless Local Area Network (WLAN) beyond a building's limits?
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What is the latency time advertised by Starlink satellite technology?
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Which type of connection operates in higher frequencies such as the two gigahertz range?
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What does rain fade refer to in satellite connections?
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What type of internet connection is known for sending a large amount of information in a short period of time?
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Which technology uses existing telephone lines in your home to provide high-speed network connections?
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What does DSL stand for in the context of network connections?
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Which technology allows you to use video, voice, and data over the same cable used for cable television?
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What is the standard for sending data over cable networks?
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Which type of connections are described as asymmetric because download speeds are often faster than upload speeds?
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Where do cellular networks get the mobile networks used for sending data?
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What is the limitation in terms of distance for DSL connections?
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What is one advantage of using fiber optics for internet connections?
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What technology allows devices to connect to the internet through the phone's 802.11 capabilities?
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In which type of network is communication restricted to devices within a building or group of nearby buildings?
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What is the major difference between a Wireless Internet Service Provider (WISP) and satellite internet service?
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What technology might a wireless ISP use to connect devices over a large area?
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What type of network is commonly used to connect multiple locations of a company within the same city?
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When connecting to devices in another city or country, what type of network are you likely using?
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What type of network allows you to integrate applications like maps and contact lists when connecting your phone to your car's audio system?
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Study Notes
- Internet connectivity can be through various means, including satellite networking and terrestrial methods like fiber, cable broadband, DSL, cellular networks, and wireless ISPs.
- Satellite networking uses a satellite dish to communicate with a low Earth orbit satellite, which can be expensive and have slower speeds compared to terrestrial methods. However, it's useful when other types of internet connectivity are unavailable.
- Latency can be a challenge with satellite connections, with delays of up to 500 milliseconds. Newer satellite technologies like Starlink aim for lower latency.
- Satellite connections operate in higher frequencies and over line of sight, but can be affected by rain and other weather conditions.
- Fiber optic links provide high-speed internet connections, but are more expensive due to the cost of equipment and repairs.
- Cable broadband uses the same cable used for cable television to provide internet, data, voice, and video communication over the same wire using different frequencies.
- DOCSIS is the standard for sending data over cable networks, supporting high speeds and allowing for multiple types of communication over the same wire.
- DSL uses existing telephone lines to provide high-speed internet, with download speeds often faster than upload speeds. However, the connection speed decreases with distance from the central office.
- Cellular networks provide internet connectivity through mobile networks, which can be accessed through tethering or hotspot functionality.
- Wireless ISPs provide internet connectivity through local ground stations, commonly in rural areas or places with limited infrastructure.
- A LAN refers to devices in a building or group of buildings with high bandwidths for communication.
- WANs are used to communicate over long distances, often slower than LANs and provided through various technologies like fiber, MPLS, or satellite links.
- Personal Area Networks (PANs) connect devices over short distances using technologies like Bluetooth, NFC, or infrared.
- Metropolitan Area Networks (MANs) connect sites within the same city, providing faster speeds than WANs but slower than LANs.
- Metro ethernet is a common type of MAN where the service provider provides the link between sites using an ethernet connection.
- MANs are commonly used by governments due to their ability to install conduit and extend fiber connections between sites.
- Storage can be extended from local drives to a centralized form called a storage area network (SAN) or a network-attached storage (NAS) device.
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