The document outlines various types of computer networks, emphasizing their importance for communication and collaboration among users. It details different network types such as Local Area Networks (LAN), Wide Area Networks (WAN), and Hybrid networks, along with their functionalities like data sharing, peripheral management, and backup. The document also highlights modern communication methods enabled by networks, including email and voice over IP.

1. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Affiliated Institution of G.G.S.IP.U, Delhi
BCA
Computer Networks
BCA210
Network Basics
Keywords: Network, Internetworking

2. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Network Definition
• Set of technologies that connects
computers
• Allows communication and collaboration
between users
2

3. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
3
• Simultaneous access to data
– Data files are shared
• Access can be limited
– Shared files stored on a server
– Software can be shared
• Site licenses
• Network versions
• Application servers

4. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
• Shared peripheral device
– Printers and faxes are common shares
– Reduces the cost per user
– Devices can be connected to the network
– Print servers control network printing
• Manage the print queue
4

5. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
5
Sharing Data

6. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
6
• Personal communication
– Email
• Instantaneous communication
– Conferencing
• Tele conferencing
• Videoconferencing
• Audio-conferencing
• Data-conferencing
– Voice over IP
• Phone communication over network wires
The Uses of Network

7. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Voice over IP

8. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
The Uses of a Network
• Easier data backup
– Backup copies data to removable media
– Server data backed up in one step

9. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
• Local Area Network (LAN)
– Contains printers, servers and computers
– Systems are close to each other
– Contained in one office or building
– Organizations often have several LANS
Common Network Types

10. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
• Wide Area Networks (WAN)
– Two or more LANs connected
– Over a large geographic area
– Typically use public or leased lines
• Phone lines
• Satellite
– The Internet is a WAN
Common Network Types

11. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Campus Area Networks (CAN)
– A LAN in one large geographic area
– Resources related to the same organization
– Each department shares the LAN

12. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Metropolitan Area Network (MAN)
– Large network that connects different
organizations
– Shares regional resources
– A network provider sells time

13. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Home Area Network (HAN)
– Small scale network
– Connects computers and entertainment
appliances
– Found mainly in the home

14. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Personal Area Network (PAN)
– Very small scale network
– Range is less than 2 meters
– Cell phones, PDAs, MP3 players