Podcast
Questions and Answers
What is a computer network?
What is a computer network?
What is a major application of computer networks?
What is a major application of computer networks?
What is a benefit of computer networks?
What is a benefit of computer networks?
What is a disadvantage of computer networks?
What is a disadvantage of computer networks?
Signup and view all the answers
What is a key criterion for a computer network?
What is a key criterion for a computer network?
Signup and view all the answers
What is a factor that affects the performance of a computer network?
What is a factor that affects the performance of a computer network?
Signup and view all the answers
What is the primary concern of security in a computer network?
What is the primary concern of security in a computer network?
Signup and view all the answers
What is another factor that affects the performance of a computer network?
What is another factor that affects the performance of a computer network?
Signup and view all the answers
What is usually measured to determine the reliability of a network?
What is usually measured to determine the reliability of a network?
Signup and view all the answers
What is a link in the context of computer networks?
What is a link in the context of computer networks?
Signup and view all the answers
What is a characteristic of a point-to-point connection?
What is a characteristic of a point-to-point connection?
Signup and view all the answers
What is the term used to describe the way devices are connected in a network?
What is the term used to describe the way devices are connected in a network?
Signup and view all the answers
What type of network topology has a dedicated point-to-point link between every two devices?
What type of network topology has a dedicated point-to-point link between every two devices?
Signup and view all the answers
What is the central device in a star topology?
What is the central device in a star topology?
Signup and view all the answers
What is a common feature of multipoint connections?
What is a common feature of multipoint connections?
Signup and view all the answers
What is the term used to describe a device in a network?
What is the term used to describe a device in a network?
Signup and view all the answers
What is the primary purpose of installing a Wide Area Network (WAN)?
What is the primary purpose of installing a Wide Area Network (WAN)?
Signup and view all the answers
What is a characteristic of a Personal Area Network (PAN)?
What is a characteristic of a Personal Area Network (PAN)?
Signup and view all the answers
What is a characteristic of a Campus Area Network (CAN)?
What is a characteristic of a Campus Area Network (CAN)?
Signup and view all the answers
What type of technology does a Metropolitan Area Network (MAN) use?
What type of technology does a Metropolitan Area Network (MAN) use?
Signup and view all the answers
What is the typical use of a Wide Area Network (WAN)?
What is the typical use of a Wide Area Network (WAN)?
Signup and view all the answers
What is the advantage of using the phone network for a Wide Area Network (WAN)?
What is the advantage of using the phone network for a Wide Area Network (WAN)?
Signup and view all the answers
What is a characteristic of a Wide Area Network (WAN)?
What is a characteristic of a Wide Area Network (WAN)?
Signup and view all the answers
What is a characteristic of different types of topologies?
What is a characteristic of different types of topologies?
Signup and view all the answers
What is the type of topology where all devices are connected to a single cable?
What is the type of topology where all devices are connected to a single cable?
Signup and view all the answers
What is the characteristic of a unidirectional ring in a ring topology?
What is the characteristic of a unidirectional ring in a ring topology?
Signup and view all the answers
What is the main advantage of a unidirectional ring in a ring topology?
What is the main advantage of a unidirectional ring in a ring topology?
Signup and view all the answers
What is the type of network that operates over a small physical area such as an office or a group of buildings?
What is the type of network that operates over a small physical area such as an office or a group of buildings?
Signup and view all the answers
What is the main advantage of a LAN?
What is the main advantage of a LAN?
Signup and view all the answers
How are machines connected in a LAN?
How are machines connected in a LAN?
Signup and view all the answers
What is the main characteristic of a bus topology?
What is the main characteristic of a bus topology?
Signup and view all the answers
What is the classification of networks based on their geography?
What is the classification of networks based on their geography?
Signup and view all the answers
How does a user typically run malware on their device?
How does a user typically run malware on their device?
Signup and view all the answers
What is the primary function of a worm?
What is the primary function of a worm?
Signup and view all the answers
How do trojan horses typically disguise themselves?
How do trojan horses typically disguise themselves?
Signup and view all the answers
What is the primary goal of phishing attacks?
What is the primary goal of phishing attacks?
Signup and view all the answers
How do worms often enter a device?
How do worms often enter a device?
Signup and view all the answers
What is a characteristic of trojan horses?
What is a characteristic of trojan horses?
Signup and view all the answers
What is a common tactic used in phishing attacks?
What is a common tactic used in phishing attacks?
Signup and view all the answers
What is a key difference between a worm and a trojan horse?
What is a key difference between a worm and a trojan horse?
Signup and view all the answers
Study Notes
Computer Networks
- A computer network is a combination of hardware and software that sends data between computers.
- It can be defined as two or more computers connected to share and exchange data.
- Hardware includes physical components that carry data or signals, while software provides instructions for network services.
Applications of Computer Networks
- Sharing resources like printers and expensive software
- Communicating between computers
- Exchanging data and information among users
- Sharing information over geographically wide areas
Benefits of Computer Networks
- Increased speed
- Reduced cost
- Improved security
- Centralized software management
- Electronic mail
- Flexible access
Disadvantages of Computer Networks
- High installation cost
- Requires time for administration
- Server failure
- Cable faults
Performance, Security, and Reliability of Computer Networks
- Performance is measured by transit time and response time
- Performance can be affected by the number of users, transmission medium, and other factors
- Security deals with preventing unauthorized access, updates, or data damage
- Reliability is measured by frequency of failure, recovery time, and network robustness
Types of Computer Networks
- Point-to-point connection: dedicated link between two devices
- Multipoint connection: shared link between multiple devices
Network Topology
- Refers to the way devices are connected
- Types of topologies: mesh, star, bus, and ring
Mesh Topology
- Each device has a dedicated point-to-point link to all other devices
- Direct connection between every two devices
Star Topology
- Each device has a dedicated point-to-point link to a central controller
- No direct link between devices
Bus Topology
- One long cable (bus) connects all devices
- Multipoint connection
- Devices connected to bus using drop lines and connectors
Ring Topology
- Each device connected to two other devices on either side
- Data transmitted in one direction along the ring
- Reduces chances of collisions and increases speed of data transmission
Classification of Networks by Geography
- PAN (Personal Area Network): organized around an individual
- LAN (Local Area Network): designed for small physical areas
- MAN (Metropolitan Area Network): in between LAN and WAN technology
- WAN (Wide Area Network): spans large distances
Local Area Network (LAN)
- Designed for small physical areas like offices or groups of buildings
- Easy to design and troubleshoot
- Exchange of information and sharing of resources becomes easy
Wide Area Network (WAN)
- Used when computers are at widely separated locations
- Communication between users established using leased telephone lines, satellite links, and similar channels
- Cheaper and more efficient to use phone network for links
Personal Area Network (PAN)
- Organized around an individual
- Consists of mobile computer, cell phone, or personal digital assistant
- Enables communication among devices and connects to digital networks and the internet
Campus Area Network (CAN)
- Interconnection of LANs with limited geographical area
- Network equipment almost entirely owned by campus owner
Metropolitan Area Network (MAN)
- In between LAN and WAN technology
- Covers entire cities
Malware
- Definition: software designed to harm or exploit a computer system
- Types: worms, trojan horses, phishing
Worms
- Can enter a device without explicit user interaction
- Self-replicate and infect other computers while remaining active on infected systems
Trojan Horses
- Disguise themselves as legitimate applications and software
- Compromise user security upon execution
- Often appear as utilities, games, or antivirus programs
Phishing
- Fraudulent practice of sending emails to induce individuals to reveal personal information
- Often involves pretending to be a trusted entity and creating a sense of urgency
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the fundamentals of computer networks, malware, and current trends in computing. It includes topics such as the definition of a network, hardware and software components, and data exchange.
