Networks Flashcards
(9 cards)
what is a network?
A network consists of multiple devices that communicate with one another. A communication medium connects these devices. It can be small as two computers or as large as billions of devices.
Why do we use networks?
-fast and effective communication
-sharing of hardware and software
-sharing of files
-Flexible access
How do you know that you are connected to a network?
-presence of networks (drives such as P:, G: and T:
-Access to shared hardware devices (printers, scanners not directly attached to the computer)
-appearance of other computing/network devices
-Indicator on taskbar showing network activity in the notification area
What is PAN?
personal area network
refers to a network built for a single person or around an individual , (Bluetooth keyboards smartwatches)
HAN
Home area network
very small network that covers a single home environment.
Any device that is connected to this network will be able to share resources (the internet , smart appliances, printers, smart meters)
LAN
Local area network
is a small network of computers covering a small area such as an office building or school
WAN
Wide area network
spread over a wide geographical area such as a city, country or even continents
LAN (Local Area Network)
Advantages and Disadvantages
ADVANTAGES
Resource Sharing:
Users can share printers, files, and internet connections easily.
Speed:
LANs offer high data transfer speeds, usually faster than other networks like WAN.
Low Cost:
Setting up and maintaining a LAN is cheaper compared to larger networks.
Easy Communication:
People in the network can chat or send messages instantly.
Centralized Data:
Data can be stored in one place (like a server), making backup and management easier.
Security:
Since it’s a private network, it’s easier to control who can access the data.
DISADVANTAGES
Limited Range:
LAN only works over a small area like a building, office, or school.
Maintenance:
Requires technical staff to manage and fix network problems.
Initial Setup Cost:
The cost of networking devices (routers, switches, cables) can be high at first.
Security Risk:
If not properly secured, users inside the network can access or misuse shared data.
Network Failure:
If the central server or main cable fails, the whole network might stop working.
WLAN (Wireless Local Area Network)
ADVANTAGES
Wireless Communication:
No need for cables; devices connect using Wi-Fi.
Mobility:
Users can move freely within the coverage area (e.g., home, office, school) and stay connected.
Easy Installation:
Faster and easier to set up compared to wired networks since there are no cables to run.
Scalability:
Easy to add new devices (phones, laptops, tablets) without extra wiring.
Cost-Effective (in some cases):
Saves money on wiring and physical infrastructure.
DISADVANTAGES
Slower Speed:
Generally slower than wired LANs due to wireless signal limitations and interference.
Limited Range:
Wi-Fi signals can weaken with distance or be blocked by walls and obstacles.
Security Risks:
More vulnerable to hacking and unauthorized access if not properly secured.
Interference:
Signals can be affected by other electronic devices like microwaves or Bluetooth.
Network Reliability:
Connections can drop or become unstable due to interference or weak signals.
