Podcast
Questions and Answers
What is the primary function of a protocol in data communication?
What is the primary function of a protocol in data communication?
- To act as a transmission medium
- To govern the rules of data communication (correct)
- To receive the message
- To ensure data delivery in a timely manner
Which of the following data communication characteristics ensures that data is delivered accurately?
Which of the following data communication characteristics ensures that data is delivered accurately?
- Delivery
- Timeliness
- Accuracy (correct)
- Protocol
What type of data flow is used in a computer network?
What type of data flow is used in a computer network?
- Transmission Medium
- Half-Duplex
- Duplex (correct)
- Simplex
What is the role of the sender in data communication?
What is the role of the sender in data communication?
What is the transmission medium in data communication?
What is the transmission medium in data communication?
What is a network?
What is a network?
What is the characteristic of data communication that ensures data is delivered to the correct destination?
What is the characteristic of data communication that ensures data is delivered to the correct destination?
What is an example of a node in a network?
What is an example of a node in a network?
What type of data flow is used in a remote control and TV?
What type of data flow is used in a remote control and TV?
What is a Network Service?
What is a Network Service?
What is the role of the receiver in data communication?
What is the role of the receiver in data communication?
What is Transmission Media?
What is Transmission Media?
What is a Point-to-Point connection?
What is a Point-to-Point connection?
What is a PAN?
What is a PAN?
How are components of a PAN connected together?
How are components of a PAN connected together?
What is LAN?
What is LAN?
What is a LAN?
What is a LAN?
What is a CAN?
What is a CAN?
What is a MAN?
What is a MAN?
What is a WAN?
What is a WAN?
What is a key criteria for a network?
What is a key criteria for a network?
What type of network connects devices in a home?
What type of network connects devices in a home?
What type of network connects different branches in a city?
What type of network connects different branches in a city?
What connects different LANs in a university campus?
What connects different LANs in a university campus?
What are the two networking metrics used to evaluate the performance of a network?
What are the two networking metrics used to evaluate the performance of a network?
What is the primary concern of network security?
What is the primary concern of network security?
What is the term used to describe a single source sending data to a specific group of nodes?
What is the term used to describe a single source sending data to a specific group of nodes?
What are the three key factors that affect network performance?
What are the three key factors that affect network performance?
What is the term used to describe the frequency of failure and recovery time of a network?
What is the term used to describe the frequency of failure and recovery time of a network?
What is the primary goal of protocol hierarchies in network software?
What is the primary goal of protocol hierarchies in network software?
What is the term used to describe a single source sending data to all nodes connected to the same network?
What is the term used to describe a single source sending data to all nodes connected to the same network?
What is the term used to describe the process of delivering data accurately and efficiently?
What is the term used to describe the process of delivering data accurately and efficiently?
Study Notes
Introduction to Data Communication
- Data communication is the exchange of data between two devices via some form of transmission medium
- It involves a sender, receiver, transmission medium, message, and protocol
Components of Data Communication
- Message: data
- Sender: device that sends the message
- Receiver: device that receives the message
- Transmission Medium: physical path between sender and receiver
- Protocol: set of rules governing data communication
Data Communication Characteristics
- Delivery: data must be delivered to the correct destination
- Accuracy: data must be delivered accurately
- Timelines: data must be delivered in a timely manner
Data Flow in Communication
- Simplex: one-way communication (e.g. remote control and TV)
- Half-Duplex: two-way communication, but not simultaneously (e.g. walkie-talkie)
- Duplex: two-way communication, simultaneously (e.g. computer network and mobile network)
Network
- A network is a set of nodes connected together to share resources and transmit information
- Node: computer, printer, scanner, software, PDA, etc.
- Information: text, voice, picture, etc.
Network Services
- Sharing (file, printer, application)
- Internet browsing
- Fax Service
- Telephony
- Conferencing
- Database
- Backup
Network Components
- Transmission media (wired, wireless)
- Network Operating System (NOS)
- Network Interface Card (NIC)
- Network Hardware: hubs, switches, routers, gateways, access point, repeaters
Network Classification
- Upon transmission medium: point-to-point, multipoint
- Upon scale (size): PAN, LAN, CAN, MAN, WAN
PAN (Personal Area Network)
- Short-distance network for individual user
- Components: printer, mobile, computer, wireless printers, PDA, etc.
- Connected via Bluetooth, USB cable, IrDA (infrared), etc.
LAN (Local Area Network)
- Group of nodes connected in a small specific area
- Components: workstations, computers, scanner, printers, servers, etc.
CAN (Campus Area Network)
- Group of interconnection LAN within limited geographical area
- Used in school campus, military base, university campus, etc.
MAN (Metropolitan Area Network)
- Large computer network connecting LAN in different locations (cities)
- Connects different branches in a city
WAN (Wide Area Network)
- Computer network covering large geographical area
- Connects different types of networks together
Network Criteria
- Performance
- Reliability
- Security
Performance
- Depends on number of users, transmission medium, hardware, and software
- Evaluated by throughput and delay
Reliability
- Measured by frequency of failure and recovery time
Security
- Includes protecting data from unauthorized access, damage, and implementing security policies
Network Modes
- Unicast: single source sends to single node
- Multicast: single source sends to specific nodes (group)
- Broadcast: single source sends to all nodes connected to the same network
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Introduction to data communication, including protocols, rules, and transmission medium.
