Podcast
Questions and Answers
What is a major disadvantage of ring topology?
What is a major disadvantage of ring topology?
- If a node fails, the entire network fails (correct)
- Detecting a problem is complex
- High data transmission speed
- Can be easily expanded
Which statement accurately describes tree topology?
Which statement accurately describes tree topology?
- It is the least expensive topology available.
- It combines elements of star and bus topologies. (correct)
- It has no root node and is flat in structure.
- Every node connects to every other node directly.
What is one of the main advantages of hybrid topology?
What is one of the main advantages of hybrid topology?
- None of the topologies used can support error detection.
- It is flexible and scalable. (correct)
- It is strictly limited in scalability.
- It is easy to design.
Why can point-to-point connections be considered more efficient than multipoint connections?
Why can point-to-point connections be considered more efficient than multipoint connections?
Which of the following is a primary disadvantage of tree topology?
Which of the following is a primary disadvantage of tree topology?
Which characteristic does NOT apply to hybrid topology?
Which characteristic does NOT apply to hybrid topology?
What is a characteristic of multipoint connections?
What is a characteristic of multipoint connections?
What is a common misconception about ring topology?
What is a common misconception about ring topology?
What is the primary purpose of a computer network?
What is the primary purpose of a computer network?
Which factor does NOT contribute to the performance measurement of a network?
Which factor does NOT contribute to the performance measurement of a network?
What does packet loss indicate in a network?
What does packet loss indicate in a network?
Which type of connection provides a dedicated link between two devices?
Which type of connection provides a dedicated link between two devices?
What does the application layer in the TCP/IP model primarily handle?
What does the application layer in the TCP/IP model primarily handle?
What does reliability in a network measure?
What does reliability in a network measure?
Which protocol in the transport layer is known for being reliable and connection-oriented?
Which protocol in the transport layer is known for being reliable and connection-oriented?
What is the primary function of the Internet/Network Layer in the TCP/IP model?
What is the primary function of the Internet/Network Layer in the TCP/IP model?
What is one of the main security issues faced in networks?
What is one of the main security issues faced in networks?
In a distributed processing network, what happens to tasks?
In a distributed processing network, what happens to tasks?
Which of the following statements accurately describes User Datagram Protocol (UDP)?
Which of the following statements accurately describes User Datagram Protocol (UDP)?
What does transit time refer to in network performance?
What does transit time refer to in network performance?
What is the purpose of bit rate control in the physical layer of the network?
What is the purpose of bit rate control in the physical layer of the network?
What functionality does the Stream Control Transmission Protocol (SCTP) provide?
What functionality does the Stream Control Transmission Protocol (SCTP) provide?
Which layer of the TCP/IP model is responsible for process-to-process communication?
Which layer of the TCP/IP model is responsible for process-to-process communication?
Which of the following protocols is NOT typically associated with the application layer in the TCP/IP model?
Which of the following protocols is NOT typically associated with the application layer in the TCP/IP model?
What is one of the main advantages of a Local Area Network (LAN)?
What is one of the main advantages of a Local Area Network (LAN)?
Which network type connects multiple devices in a larger geographical area than a LAN but smaller than a WAN?
Which network type connects multiple devices in a larger geographical area than a LAN but smaller than a WAN?
What is a disadvantage of a Metropolitan Area Network (MAN)?
What is a disadvantage of a Metropolitan Area Network (MAN)?
Which of the following statements about a Wide Area Network (WAN) is true?
Which of the following statements about a Wide Area Network (WAN) is true?
What is a primary function of a Local Area Network (LAN)?
What is a primary function of a Local Area Network (LAN)?
Which of the following is NOT a characteristic of LANs?
Which of the following is NOT a characteristic of LANs?
What defines a Wide Area Network (WAN)?
What defines a Wide Area Network (WAN)?
What potential issue can occur with increased usage in a Metropolitan Area Network (MAN)?
What potential issue can occur with increased usage in a Metropolitan Area Network (MAN)?
What is the primary purpose of encryption in data transmission?
What is the primary purpose of encryption in data transmission?
Which of the following best describes the function of the session layer in networking?
Which of the following best describes the function of the session layer in networking?
What is the main function of the Internetworking Protocol (IP)?
What is the main function of the Internetworking Protocol (IP)?
Which protocol is utilized to discover a device's MAC address from its IP address?
Which protocol is utilized to discover a device's MAC address from its IP address?
Which of the following statements accurately describes TCP in the transport layer?
Which of the following statements accurately describes TCP in the transport layer?
What is the purpose of the Reverse Address Resolution Protocol (RARP)?
What is the purpose of the Reverse Address Resolution Protocol (RARP)?
What role does flow control play in the transport layer?
What role does flow control play in the transport layer?
Which of the following is a characteristic of connectionless service in the transport layer?
Which of the following is a characteristic of connectionless service in the transport layer?
Which of the following best describes the Internet Control Message Protocol (ICMP)?
Which of the following best describes the Internet Control Message Protocol (ICMP)?
What is the role of the Internet Group Message Protocol (IGMP)?
What is the role of the Internet Group Message Protocol (IGMP)?
What is the primary function of the network layer?
What is the primary function of the network layer?
Which function of the transport layer involves dividing messages into smaller segments?
Which function of the transport layer involves dividing messages into smaller segments?
Which model is independent and serves as a generic communication gateway between the network and the end user?
Which model is independent and serves as a generic communication gateway between the network and the end user?
In the context of data compression, what does the process achieve?
In the context of data compression, what does the process achieve?
What was the primary purpose of the TCP/IP model?
What was the primary purpose of the TCP/IP model?
Which of the following layers in the TCP/IP model encompasses both the physical and data link layers of the OSI model?
Which of the following layers in the TCP/IP model encompasses both the physical and data link layers of the OSI model?
Flashcards
Network node
Network node
A device connected to a computer network, such as a computer, printer, or smartphone.
Network performance
Network performance
The ability of a network to deliver data reliably and efficiently.
Transit time
Transit time
The time it takes for a message to travel from one device to another.
Network throughput
Network throughput
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Packet loss
Packet loss
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Network security
Network security
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Point-to-point connection
Point-to-point connection
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Multipoint connection
Multipoint connection
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Local Area Network (LAN)
Local Area Network (LAN)
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Metropolitan Area Network (MAN)
Metropolitan Area Network (MAN)
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Wide Area Network (WAN)
Wide Area Network (WAN)
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LAN Speed
LAN Speed
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LAN Setup
LAN Setup
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LAN Security
LAN Security
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MAN Advantages
MAN Advantages
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WAN Feature
WAN Feature
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Ring Topology
Ring Topology
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Star Topology
Star Topology
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Bus Topology
Bus Topology
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Tree Topology
Tree Topology
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Hybrid Topology
Hybrid Topology
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Bidirectional Data Flow
Bidirectional Data Flow
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Encryption
Encryption
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Data compression
Data compression
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Session layer
Session layer
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Transport layer
Transport layer
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TCP (Transmission Control Protocol)
TCP (Transmission Control Protocol)
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UDP (User Datagram Protocol)
UDP (User Datagram Protocol)
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Network layer
Network layer
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What does the Physical Layer define in a network?
What does the Physical Layer define in a network?
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What is network topology?
What is network topology?
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What is TCP/IP?
What is TCP/IP?
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What is the role of the Application Layer in TCP/IP?
What is the role of the Application Layer in TCP/IP?
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What is the purpose of the Transport Layer in TCP/IP?
What is the purpose of the Transport Layer in TCP/IP?
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What is the role of the Internet Layer in TCP/IP?
What is the role of the Internet Layer in TCP/IP?
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What is the responsibility of the Network Access/Link Layer in TCP/IP?
What is the responsibility of the Network Access/Link Layer in TCP/IP?
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What is the key difference between TCP and UDP?
What is the key difference between TCP and UDP?
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What is the primary function of IP (Internetworking Protocol)?
What is the primary function of IP (Internetworking Protocol)?
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What does ARP (Address Resolution Protocol) do?
What does ARP (Address Resolution Protocol) do?
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What is the purpose of RARP (Reverse Address Resolution Protocol)?
What is the purpose of RARP (Reverse Address Resolution Protocol)?
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What kind of messages does ICMP (Internet Control Message Protocol) send?
What kind of messages does ICMP (Internet Control Message Protocol) send?
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What is the function of IGMP (Internet Group Message Protocol)?
What is the function of IGMP (Internet Group Message Protocol)?
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What does the Network Access/Link Layer do in the TCP/IP model?
What does the Network Access/Link Layer do in the TCP/IP model?
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Which organization developed the TCP/IP model?
Which organization developed the TCP/IP model?
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What is the purpose of the OSI model?
What is the purpose of the OSI model?
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Study Notes
Data Communication
- Data communication is the transfer of data from a source to one or more receivers through a communication medium, following a set of rules (protocol).
- Key components of a data communication system are message, sender/transmitter, receiver, transmission medium, and protocol.
Data Representation Forms
- Information transmitted can be text, numbers, images, audio, or video.
- Text is represented as bit patterns (sequences of 0s and 1s).
- Different sets of bit patterns code various symbols, like ASCII, or Unicode, used to represent text.
- Numbers are represented directly in binary to simplify mathematical operations.
- Images are composed of a matrix of pixels (picture elements), where each pixel is a small dot.
- Image resolution affects representation quality and storage size.
- Audio refers to recorded or broadcast sound or music. This information is often converted to digital or analogue signals.
- Video encompasses recordings of pictures or movies; these may be continuous entities (e.g., a TV camera) or a combination of images for motion representation.
Data Flow Methods
- Data flow (transmission mode) defines the direction of information flow between devices.
- Three transmission modes are Simplex, Half-duplex, and full duplex.
- Simplex is unidirectional (one-way communication).
- Half-duplex is bidirectional, but not simultaneous in either direction.
- Full-duplex is bidirectional and allows simultaneous transmission and reception in both directions.
Computer Network
- A computer network connects multiple computing devices using a transmission medium (e.g., wires, cables, radio waves).
- Each device is a node.
- Networks are crucial for information exchange.
- Network performance factors include response time, transit time, and delay.
Network Criteria/Attributes
- Performance metrics include response time (time between inquiry and response), transit time (time for a message to travel between devices), and delay (time taken for a packet to traverse from source to destination).
- Reliability considers the frequency of failures, recovery time, and the network's ability to remain functional.
- Security encompasses protecting data from unauthorized access or damage.
- Throughput measures the amount of successful packet delivery within a set time period.
- Packet loss occurs when one or more packets fail to reach their intended destination.
Network Topologies
- Topology defines how network components are interconnected.
- Common topologies include Mesh, Star, Bus, Ring, Tree, and hybrid
- Mesh: every node is connected to every other node.
- Star: all nodes connect to a central hub.
- Bus: nodes are connected along a single cable.
- Ring: nodes form a closed loop.
- Tree: hierarchical structure combining elements of bus and star topologies.
- Hybrid: combines elements of other topologies.
Network Types
- Local Area Network (LAN) is a group of connected devices within a limited area (e.g., home, office, school). LANs support file and hardware resource sharing. The transmission speed of a LAN is higher than other network types.
- Metropolitan Area Network (MAN) spans a broader area such as a city or a group of towns to connect multiple LANs. A MAN is typically used to provide fast data transmission between different locations in a city or a similar geographical area.
- Wide Area Network (WAN) extends over a large geographical area (country, continent or the entire world). Internet and other global networks are examples of WANs. WANs are usually less efficient than LANs, and the transmission speed is lower.
OSI/ISO Reference Model
- The OSI model is a conceptual framework for how applications communicate over a network. It is a layered architecture that specifies how different protocols in each layer interact with each other. It is not actually used in the industry.
- The TCP/IP model is a more practical, less generalised, conceptual model that describes data transmission over Internet in terms of four layers: Application, Transport, Internet, and Network Access.
Protocols Examples
- TCP/IP: used for communication over the Internet.
- UDP: used to send data faster but not securely
- HTTP, HTTPS, FTP, Telnet, SSH, SMTP, SNMP are application-level protocols.
- ARP and RARP are used in the network layer to convert between IP and physical addresses.
- ICMP, IGMP provide error messages and support for multicasting, respectively.
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