Topic 1 A Review on Computer Networks (1) Flashcards
(43 cards)
What are the disadvantages of a Metropolitan Area Network (MAN)?
Higher setup and maintenance costs, security risks, limited coverage, network congestion
Security risks require strong cybersecurity measures. Limited coverage does not extend beyond a city or metropolitan region.
What is a Wide Area Network (WAN)?
A network that extends over a large geographical area such as states or countries
WANs connect multiple smaller networks like LANs and MANs.
What are the characteristics of a Wide Area Network (WAN)?
- Large geographic coverage
- Uses public and private infrastructure
- Centralized management
- Supports remote access
List examples of Wide Area Networks (WAN).
- The Internet
- Banking networks
- Corporate WANs
- Government networks
What are the advantages of a Wide Area Network (WAN)?
- Large geographic coverage
- Centralized data and resources
- Scalability
- Supports Cloud Computing
- Enhances communication
- Reliable and redundant
- Remote access
What are the disadvantages of a Wide Area Network (WAN)?
- Security issues
- High setup cost
- Troubleshooting problems
- Slower speeds
- Complex management
What is defined as internetworking?
Two or more computer networks (LANs or WANs) connected using devices configured by a local addressing scheme.
What is an extranet?
A communication network based on the internet protocol used for information sharing, restricted to users with login credentials.
What is an intranet?
A private network based on the internet protocol accessible only by an organization’s employees.
What are the advantages of intranets?
- Communication
- Time-saving
- Collaboration
- Platform independency
- Cost effective
What is topology in computer networks?
The way computers and devices are connected, defining the structure of the network.
What are the two types of topology?
- Physical topology
- Logical topology
What defines physical topology?
The layout of devices in the network and how they are physically connected.
What are the advantages of a Metropolitan Area Network (MAN)?
- Covers a wide area efficiently
- High-speed data transfer
- Cost-effective for organizations
- Supports multiple users and businesses
- Improves communication and collaboration
What is a Local Area Network (LAN)?
A group of computers connected to each other in a small area such as a building or office.
What is a Personal Area Network (PAN)?
A network arranged within an individual person, typically within a range of 10 meters.
What are the advantages of Bus topology?
- Low-cost cable
- Moderate data speeds
- Limited failure impact
- Easy to expand
What is Star topology?
An arrangement where every node is connected to a central hub or switch.
What are the disadvantages of Star topology?
Central point of failure if the hub or switch goes down.
What is Ring topology?
A network where each computer and device are connected in a large circle.
What is token passing?
A network access method where a token circulates, allowing nodes to send messages.
What are the disadvantages of Ring topology?
- Failure in any device disrupts the entire network
- Performance degrades with more devices
- Communication delay increases with more nodes
What are the disadvantages of computer networks?
- Security risks
- High setup and maintenance costs
- Network failures affect many users
- Privacy issues
- Spread of viruses/malware
- Requires skilled personnel
- Bandwidth and performance issues
- Risk of data loss
What are the benefits of computer networks?
- File sharing
- Device sharing
- Service sharing
- Improved communication
- Cost efficiency
- Remote access
- Faster data transfer
- Security & backup
- Scalability
- Reliability & redundancy
