Umesh kumar gangwar 1
- 1. PRESENTED BY Created by: Umesh kumar emkkjnhhm
- 2. Introduction Features Parts of Computer Types of Computer
- 3. C-compact& complete. O-operational. M-main operated. P-portable. U-usable. T-time. E-easy. R-reliable.
- 4. The computer comes from the word compute which means to calculate .Hence people usually consider a computer to be a calculating device that can perform arithmetic operation at high speed.
- 5. Speed:- Computer can perform billion (109) arithmetic operation in one second. Accuracy:-Gives right and accurate information. Versatility:- Perform various task. Diligence:-Free from tiredness. No Feeling No IQ
- 6. Mouse Keyboard Printer Scanner Monitor CPU
- 7. Mini computer Super computer Micro computer Mainframe computer
- 8. ALU Accumulator General register Control Unit Memory Auxiliary Memory Input Output Figer 1. Digital computer CPU
- 9. Register Cache Main memory Disk cache Magnetic disk 1-2ns 3-50ns 30-90ns 5-20ms Optical disk Magnetic tape Figer 2. Memory Hierarchy Offline Most costly System Less costly
- 10. Internet:- Network of networks. Internet is based upon the need to share information between two or more computers. This is done by interconnecting or networking the computers. The computers may be connected through various media as optical fibers, telephone lines and satellite systems. The internet is a decentralized global network of various networks.
- 11. 1.LAN (Local Area Network) 2.MAN (Metropolitan Area Network) 3.WAN (Wide Area Network)
- 12. APPLICATION LAYER APPLICATION LAYER SESSION LAYER TRANSPORT LAYER NETWORK LAYER DATALINK LAYER PHYSICAL LAYER PRESENTATION LAYER SESSION LAYER TRANSPORT LAYER NETWORK LAYER DATALINK LAYER PHYSICAL LAYER PRESENTATION LAYER
- 13. Request Request Internet Internet Response Response Client Server
- 14. Mail refers to the sending and receiving of documents in electronic form from one computer to another computer .Every recipient or user must have an Email address .This mail address is used to send and receive the mail . The email is delivered to the inbox of the user.
- 15. Senders ISP Senders computer Receivers ISP Mail server of receivers ISP Receivers computer Internet Telephone lines
- 16. If the buying and selling of product’s and other related activities of business are conducted with the help of internet then known as Ecommerce . Other names of ecommerce are:- 1. Electronic trading 2. Electronic business 3. Electronic Marketing
- 17. 1. B to B (Business to business) 2. B to C (Business to customer) 3. B to G (Business to Government) *B to B:- business alliance between different companies for their mutual benefit. • B to C:- Shopping on internet. • B to G:- Governments departmental website.
- 18. From credit cards and debit cards. Authorization Bank Credit cards processor Bill Customer Company Result of verification Verification Credit cards
- 19. Fire wall are the hardware or software that are placed on the gateway. Fire wall is used to protect the network from the outer side world against any unauthorized access to the network. The most common way to doing to this is by placing a computer at the gateway , which verifies the authenticity of the user fire wall is also known as secure internet gateway.
- 20. Fire wall Outer world