Questions and Answers
What is defined by a protocol in network communication?
Which characteristic is true about cable internet access compared to DSL?
In the context of internet access networks, what does DSL stand for?
What is the purpose of a Cable Modem Termination System (CMTS)?
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The asymmetric nature of access networks typically means what regarding downstream and upstream channels?
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Which aspect does NOT directly affect a network's architecture?
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Which component functions similarly to a DSL Access Multiplexer (DSLAM) in a cable network?
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What type of network structure includes both servers and clients?
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What is the primary difference between packet switching and circuit switching?
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Which of the following best describes store-and-forward transmission?
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What is a common impact of queuing delays in network communication?
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Which architectural model best explains the layered structure of network protocols?
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In network architecture, what does the term 'core' refer to?
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What is the main characteristic of a reliable connection-oriented service?
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Which of the following protocols is an example of a connectionless transport layer service?
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Which factor is most directly affected by implementing flow control in network communications?
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What is the primary difference between packet switching and circuit switching?
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Which of the following accurately describes the concept of store-and-forward transmission?
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Which scenario is more likely to result in queuing delays?
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How does the architecture of a local area network (LAN) primarily impact data transmission?
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Which type of medium is classified as unguided media?
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What role does the optical network terminator (ONT) play in home networking?
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In what way does packet switching enhance network efficiency?
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Which of the following best describes 'queuing delays' in network communication?
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Study Notes
Optical Network Terminators and LANs
- Each home contains an Optical Network Terminator (ONT), linked by dedicated optical fiber to a neighborhood splitter.
- Local Area Networks (LANs) facilitate connections between end systems and edge routers, prevalent in corporate, university, and home environments.
- Ethernet is the dominant access technology utilized in these LAN settings.
Physical Medium
- Physical media are diverse and can vary for each transmitter-receiver pair within a network.
- Types of physical media include:
- Twisted-pair copper wire
- Coaxial cable
- Multimode fiber-optic cable
- Terrestrial and satellite radio spectrum
- Two categories of physical media:
- Guided Media: Signals travel through solid mediums (fiber-optic cables, twisted-pair wires).
- Unguided Media: Signals propagate through the atmosphere (wireless LAN, digital satellite channels).
Network Core
- The network core consists of packet switches and links that connect end systems across the Internet.
- Data transmission methods include:
- Packet Switching: Allows end systems to exchange messages, performing various functions, from control signals to multimedia data.
- Circuit Switching: Establishes a dedicated communications path before data transfer begins.
- Protocols govern message format, order, and actions taken for data transmission and receipt.
Network Structure
- The network comprises three main components:
- Network Edge: Includes servers, clients, and end systems (hosts).
- Access Network: Can be either wired or wireless.
- Network Core: Features international routers and networks interlinking other networks.
Access Networks
- Broadband residential access often utilizes:
- Digital Subscriber Line (DSL):
- High-speed downstream channel operates between 50 kHz to 1 MHz
- Medium-speed upstream channel operates between 4 kHz to 50 kHz
- Ordinary telephone channel operates from 0 to 4 kHz
- Cable Internet: Utilizes existing cable TV infrastructure to provide internet service alongside television.
- Digital Subscriber Line (DSL):
Cable Internet Access
- Cable internet is connected through the same provider as cable television.
- The Cable Modem Termination System (CMTS) converts analog signals from downstream homes back to digital format.
- Cable modems segment the Hybrid Fiber-Coaxial (HFC) network into distinct downstream and upstream channels, typically with higher downstream rates.
Course Overview
- Key topics include:
- Introduction to Internet services and protocols.
- Understanding packet switching versus circuit switching, including performance metrics like delay, loss, and throughput.
- Exploration of OSI and TCP/IP models, with emphasis on various application layer architectures and protocols.
- Analysis of transport layer services, focusing on reliable versus unreliable connections and protocols such as UDP and TCP.
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Description
Test your understanding of networking concepts including Optical Network Termination (ONT), local area networks (LAN), and Ethernet technology. This quiz covers essential knowledge crucial for both corporate and home networking settings. Prepare to dive into the details of physical media and network connectivity!
