Computer Science

1. Describe the OSI reference
model with diagram
OSI (Open Systems Interconnection) is a reference model for how applications
communicate over a network. A reference model is a conceptual framework for
understanding relationships. ... The TCP/IP protocol suite, which defines the
internet, does not map cleanly to the OSI model.
OSI
(
‫انٹرکنیکشن‬ ‫سسٹم‬ ‫اوپن‬
)
‫ج‬ ‫بتایا‬ ‫یہ‬ ‫میں‬ ‫جس‬ ‫ہے‬ ‫ماڈل‬ ‫ریفرنس‬ ‫ایک‬
‫ہے‬ ‫اتا‬
‫ح‬ ‫ایک‬ ‫ہیں۔‬ ‫کرتے‬ ‫چیت‬ ‫بات‬ ‫پر‬ ‫ورک‬ ‫نیٹ‬ ‫کسی‬ ‫کیشنز‬ ‫ایپلی‬ ‫طرح‬ ‫کس‬ ‫کہ‬
‫ماڈل‬ ‫والہ‬
‫ہے۔‬ ‫ورک‬ ‫فریم‬ ‫تصوراتی‬ ‫ایک‬ ‫لئے‬ ‫کے‬ ‫سمجھنے‬ ‫کو‬ ‫تعلقات‬
...
TCP / IP
، ‫ہے‬ ‫کرتا‬ ‫وضاحت‬ ‫کی‬ ‫انٹرنیٹ‬ ‫جو‬ ، ‫سوٹ‬ ‫پروٹوکول‬
OSI
‫نقشہ‬ ‫صاف‬ ‫کا‬ ‫ماڈل‬
‫ہے۔‬ ‫بناتا‬ ‫نہیں‬

2. OSI: Open System Interconnection
Reference Model
Found: 1976
ISO: International Standard Organization
Lunch: 1986
TCP/IP: Transmission Control Protocol/Internet
Protocol, which is a set of networking protocols
that allows two or more computers to
communicate.
Implement Model

4. What is Computer Network
A computer network is a group of computers that use a set
of common communication protocols over digital
interconnections for the purpose of sharing resources
located on or provided by the network nodes.

5. Types of Computer Network
There are mainly three types of computer networks based on their
size:
1) Personal Area Network (PAN)
2) Local Area Network (LAN)
3) Metropolitan Area Network (MAN)
4) Wide area network (WAN)

6. Local Area Network (LAN)

7. Lan Components
1) Work station
2) File Server
3) Gateway
4) Network Interfacing Unit (NIU)
5) Hub
6) Communication channels / Lan Cable

8. Advantages of Lan
) High Reliability
2) Adding work station is easy.
3) Sharing of peripheral devices like printers is easy
Application of Lan
1) File Transfer and File Access
2) Personal Computing
3) Document Distribution

9. Metropolitan Area Network (MAN)

10. Wide area network (WAN)

11. Sir. Muhammad Sajid
Present by: