Questions and Answers
What is the process of converting between bits and signals that represent them called?
What is the main purpose of internetworking in network communications?
Which type of service in networking is specifically designed to ensure a reliable connection?
Which group primarily oversees interests related to Internet technologies?
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What distinguishes MEO satellites from other types of satellites?
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Which of the following best differentiates between a service and a protocol in networking?
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Which of these characteristics primarily defines wireless local area networks (WLANs)?
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What is a significant advantage of using higher bandwidth in networking?
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What is the purpose of consecutive frames in video compression?
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Identify the ITU sector that does not exist.
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What are the interlinked nodes in a switched network known as?
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How long does it take for a LEO satellite to complete one orbit at 1000 km altitude?
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What is the primary function of network protocols?
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Which multiplexing technique uses frequency bands for different users?
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Which mobile generation employs broadband CDMA technology?
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Which type of network typically utilizes base stations for coverage?
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What distinguishes services from protocols in networking?
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What is a critical aspect of the client-server model?
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Throughput in networking is most accurately defined as:
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Which reference model is dominantly used in Internet architecture?
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To achieve global coverage with satellites at 1500 km altitude, how many satellites are required compared to a LEO system of 66 satellites at 780 km?
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What is a significant drawback of the liberating nature of computer networks?
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In what context are Metropolitan Area Networks (MAN) typically utilized?
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What defines the primary function of the physical layer in networking?
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What is the primary difference between multimode step-index and multimode graded-index fiber?
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What does the abbreviation PSTN stand for?
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Which of the following factors does NOT significantly affect the quality of digital video?
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Which generation of mobile networks first introduced all packet-switched cores?
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In network protocols, what does the term 'peers' refer to?
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Which component of a data communications system represents the information that is communicated?
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What is the primary characteristic of Personal Area Networks (PANs)?
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What does UTP refer to in network cabling?
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Which of the following technologies is NOT typically categorized as broadband access?
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Which type of connector is most commonly used with coaxial cables today?
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Which aspect of network security focuses on policies for recovering from breaches?
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Which organization is responsible for developing Web standards?
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Which type of network typically covers a large geographical area?
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Which of the following is NOT considered a primary function of content provider networks?
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What characteristic is unique to transmission methods that occupy a band of frequencies?
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Study Notes
Networking Concepts
- Services are connectionless, while protocols specify rules for communication.
- Services focus on operations at higher layers; protocols facilitate interactions between peer entities.
- In networking, 'throughput' measures data transfer rate rather than reliability or signal strength.
Satellite Internet Backbone
- MEO (Medium Earth Orbit) and Geostationary satellites are key for satellite-based Internet backbone networks.
- LEO (Low Earth Orbit) satellites require a greater number for complete global coverage due to their lower altitude.
Client-Server Model
- The client-server model exemplifies a resource-sharing method where clients request services from servers.
Internet and Reference Models
- The TCP/IP Reference Model is widely utilized on the Internet.
- The OSI Reference Model is another important framework for network architecture.
Technical Specifications and Measurements
- A LEO satellite system typically comprises 66 satellites at an altitude of 780 km; 24 satellites can provide equivalent coverage at 1500 km.
- Frame rate, resolution, and bit rate are critical for digital video quality, while compression type has a lesser impact.
Network Types and Technologies
- Wireless Local Area Networks (WLANs) differ from cellular networks primarily in their susceptibility to electromagnetic interference.
- Protocols are influential for managing interfaces between layers and ensuring effective data communication.
- Personal Area Networks (PANs) connect devices in close proximity for individual users, contrasting with larger network types.
Network Infrastructure
- UTP stands for Unshielded Twisted Pair, a common type of network cable.
- RJ-45 connectors are frequently used in modern coaxial cable setups.
Security and Recovery
- Network security policies establish recovery protocols following security breaches, promoting resilience against threats.
Content Provider Networks
- Primary functions of content provider networks exclude providing direct internet access to end-users, focusing instead on efficient content delivery and server load balancing.
Multiplexing Techniques
- Frequency Division Multiplexing (FDM) allows multiple users to share the same communication medium by dividing the spectrum into frequency bands.
Video Processing
- In video compression, consecutive frames depict motion and changes rather than static images or audio tracks.
ITU and Standards Development
- W3C is responsible for developing web standards, while different sectors like ITU-R, ITU-T, and ITU-D focus on telecommunications, standardization, and development, respectively.
Mobile Networks
- The shift to all packet-switched cores first occurred in 4G mobile networks, allowing more efficient data transmission.
Satellite Orbital Mechanics
- LEO satellites orbit at approximately 1000 km altitude, with calculations indicating it takes about 135 minutes to complete an orbit at that altitude.
Summary of Key Terms
- PSTN stands for Public Switched Telephone Network, a key technology in telecommunications.
- Different multiplexing techniques serve varying bandwidth and usage requirements within network communications.
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Description
Test your knowledge on networking concepts such as services, protocols, and satellite types used in Internet backbone networks. This quiz covers fundamental terms and models, including the client-server architecture, offering a comprehensive review of key topics in networking.
