Podcast
Questions and Answers
What is the approximate diameter of a campus network?
What is the approximate diameter of a campus network?
- 1 ~ 10 meters
- 1 ~ 10 kilometers (correct)
- 10m - 200m
- 1 ~ 5 meters
Which of the following is NOT considered a component of the Internet's 'edge'?
Which of the following is NOT considered a component of the Internet's 'edge'?
- end systems
- network apps
- hosts
- routers (correct)
Which type of network connection is typically used for devices connecting directly to each other via Wi-Fi without an access point?
Which type of network connection is typically used for devices connecting directly to each other via Wi-Fi without an access point?
- Wired LAN
- Bluetooth
- Cellular network
- Ad-hoc Wi-Fi (correct)
What is the primary function of packet switches in the Internet?
What is the primary function of packet switches in the Internet?
Which of the following is an example of a device that is typically connected to a PAN?
Which of the following is an example of a device that is typically connected to a PAN?
What is the difference between an intranet and an extranet?
What is the difference between an intranet and an extranet?
What is the primary function of a content provider network in the Internet?
What is the primary function of a content provider network in the Internet?
Which of the following is NOT considered a type of network extent?
Which of the following is NOT considered a type of network extent?
What is the approximate diameter of a local area network (LAN)?
What is the approximate diameter of a local area network (LAN)?
What is the meaning of 'bandwidth' in the context of communication links?
What is the meaning of 'bandwidth' in the context of communication links?
Which of the following best describes the concept of 'Data Communication' as discussed in the text?
Which of the following best describes the concept of 'Data Communication' as discussed in the text?
Based on the text, what is the key difference between 'Analog' and 'Digital' data?
Based on the text, what is the key difference between 'Analog' and 'Digital' data?
Which of the following is NOT a component of a data communication system, as described in the text?
Which of the following is NOT a component of a data communication system, as described in the text?
What is the significance of the 'Protocol' component in a data communication system?
What is the significance of the 'Protocol' component in a data communication system?
Which of the following is an example of 'Analog data' as discussed in the text?
Which of the following is an example of 'Analog data' as discussed in the text?
Based on the text, which of the following is a key advantage of using digital data in communication?
Based on the text, which of the following is a key advantage of using digital data in communication?
Which of the following examples is NOT mentioned in the text as a type of data that can be communicated?
Which of the following examples is NOT mentioned in the text as a type of data that can be communicated?
What does the text suggest is the primary focus of data communication in today's world?
What does the text suggest is the primary focus of data communication in today's world?
Which statement is true regarding the bus topology?
Which statement is true regarding the bus topology?
What is a key characteristic of a ring topology?
What is a key characteristic of a ring topology?
In a star topology, what is the role of the hub?
In a star topology, what is the role of the hub?
Which statement accurately describes tree topology?
Which statement accurately describes tree topology?
What distinguishes full-mesh connectivity from other topologies?
What distinguishes full-mesh connectivity from other topologies?
Which of the following best describes multicast data flow?
Which of the following best describes multicast data flow?
Which statement about circuit switching is NOT true?
Which statement about circuit switching is NOT true?
What is a disadvantage of using a full-mesh topology?
What is a disadvantage of using a full-mesh topology?
In circuit switching, which phase occurs directly after the connection establishment?
In circuit switching, which phase occurs directly after the connection establishment?
What happens when the arrival rate of packets exceeds the output link capacity?
What happens when the arrival rate of packets exceeds the output link capacity?
How is 'throughput' defined in a data communication context?
How is 'throughput' defined in a data communication context?
What is a potential consequence of packets arriving at a full buffer?
What is a potential consequence of packets arriving at a full buffer?
What type of delay occurs when packets are queued in a buffer?
What type of delay occurs when packets are queued in a buffer?
In a network data transmission, what can happen if the queue preceding a link reaches its maximum capacity?
In a network data transmission, what can happen if the queue preceding a link reaches its maximum capacity?
What characterizes the 'instantaneous throughput' in data communication?
What characterizes the 'instantaneous throughput' in data communication?
Which statement about packet loss is accurate?
Which statement about packet loss is accurate?
Which factor primarily determines the length of time packets spend in a queue?
Which factor primarily determines the length of time packets spend in a queue?
What is one characteristic of a metropolitan area network (MAN)?
What is one characteristic of a metropolitan area network (MAN)?
Which network topology involves all stations connecting to a common linear medium?
Which network topology involves all stations connecting to a common linear medium?
Which statement correctly describes the point-to-point connection?
Which statement correctly describes the point-to-point connection?
What is a common feature of a wide area network (WAN)?
What is a common feature of a wide area network (WAN)?
What distinguishes tree topology from other topologies?
What distinguishes tree topology from other topologies?
Which topology allows for multiple paths between devices for data transmission?
Which topology allows for multiple paths between devices for data transmission?
Study Notes
What is Data Communication?
- Data communication is the process of exchanging or sharing information or messages between communicating entities, which can be human-to-human or non-human (devices or systems).
- Data communication involves representing information or messages as "data", which can be analog or digital.
- Analog data is continuously varying in time and amplitude, while digital data is represented using 1s and 0s.
Components of Data Communication Systems
- The five components of a data communication system are:
- Message: the information (data) to be communicated.
- Sender: the device that sends the data message.
- Receiver: the device that receives the data message.
- Transmission medium: the channel through which the data message is sent.
- Protocol(s): the set of rules governing data communication.
Message
- The message can be of various types, including text, numbers, image, video, and audio.
- Each type of message has its own representation, such as text being represented using ASCII codes.
Sender
- The sender is the device that sends the data message, which can be a computer, gaming devices, or internet phones.
Networks
- A network is a collection of interconnected devices, routers, and links, managed by an organization.
- Networks can be classified based on their extent, including:
- Personal Area Network (PAN)
- Local Area Network (LAN)
- Campus Network
- Metropolitan Area Network (MAN)
- Wide Area Network (WAN)
- Intranet/Extranet/Internet
Network Topologies
- Network topologies include:
- Point-to-point: a dedicated link between two devices.
- Bus: all stations attach directly to a linear transmission medium.
- Ring: each device has a dedicated point-to-point connection with only the two devices on either side.
- Star (hub and spoke): each device has a dedicated point-to-point link only to a central controller.
- Tree: multiple levels of star-type networks.
- Mesh: devices have dedicated point-to-point links to one or many other devices.
Data Flow in Networks
- Data flow can be classified into three types:
- Unicast: from the sender to one destination node.
- Broadcast: from the sender to all destinations (nodes) in the network.
- Multicast: from the sender to selected destinations.
Circuit Switching
- Circuit switching uses a dedicated path between two stations.
- It has three phases: connection establishment, data transfer, and disconnection.
- It can be inefficient, as channel capacity is dedicated for the duration of the connection, even if no data is being sent.
Packet Switching
- Packet switching does not allocate end-end resources, and packets queue in router buffers, waiting for their turn for transmission.
- Packet loss occurs when memory to hold queued packets fills up, and packets are dropped.
Performance Metrics
- Packet loss: the percentage of packets that are lost during transmission.
- Delay: the time taken for a packet to travel from the sender to the receiver.
- Throughput: the rate at which bits are being sent from the sender to the receiver.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the basics of data communication, including types of data, components of a data communication system, message types, and network topologies. It also touches on circuit switching, packet switching, and network performance.
