Nms chapter 01
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This document provides an overview of network fundamentals and components. It defines a network as a system that links computers together to share data and resources. Networks have evolved from early local area networks within a single building to modern wide area networks that span the globe. Networks allow sharing of information, hardware, security, and backup files between connected computers. Key components of networks include network interface cards, networking media like cables, and network devices that control traffic flow.
Nms chapter 01
- 1. Chapter 1 Network Fundamentals Networking Fundamentals and Media Services (NMS)
- 2. Network A system in which a number of computers are linked together to share data and peripherals Resources Hard disks, printers, internet connection, etc
- 3. Evolution of Networks Local Area Metropolitan Wide Area Connect 2 Sneakernet Network Area Network Network computers (LAN) (MAN) (WAN) • Hand carry thumb • Computers • Computers • Computers drive / disk interconnected interconnected interconnected within a building within several around the world buildings
- 4. Why network? Share information or data Share hardware or software Sharing information or data Increase security • Documents • Videos & audio files Backup files • Calendar schedule • Social media Share internet connection Play multiplayer games
- 5. Network security Logging out if you will be away from your workstation for more than 15 minutes Using unusual passwords (containing letters, number and special characters) and changing them regularly Using deceptive filenames for sensitive data Conducting audit trial to track network activities
- 6. Intranet vs Internet Intranet Network to make information available to employees on the company’s internal network Internet World-wide network of computers accessible to anyone who knows their Internet Protocol (IP) address - the IP address is a unique set of numbers (such as 209.33.27.100) that defines the computer's location.
- 7. Backup A file server is a computer responsible for the storage and management of data in a central location.
- 8. Components of LAN Computers Hosts Peripherals (Shared Resources) Network Interface Card (NIC) Networking media –> how the hosts communicate Network traffic control or Network Communication devices
- 10. Network Interface Card (NIC) A printed circuit board (PCB) that fits into the expansion slot or integrated into the mother board Also called network adapter Adapt the host device to the network medium Unique Media Access Control (MAC) address
- 11. Networking Media Coaxial cable Fiber Optic cable Free space Copper cable
- 12. Networking Media Coaxial cable
- 13. Networking Media Fiber Optical cable
- 14. Networking Media Copper cable Pairs with different twist rates to reduce crosstalk RJ45 (Registered Jack )
- 15. Network traffic control or Network Communication devices Repeater – amplifies the electrical signals and resends the data, single port “in” and single port “out” Hub – may be 4, 8, 12, 16 or 24 ports Passive: just split the signal for multiple hosts Active: multi-port repeater, extend a cable length Bridge – filter traffic between two LAN segment using MAC address Switch – multi-port bridge Difference between Hub and Switch? Router – direct traffic from one network to another (path selection and switching of packets) using IP address
- 16. Symbols Another network or the whole internet
- 17. Q&A
- 18. Work in groups of 1-3 students Create a mindmap of this topic Prize for the best mindmap Exercise 1 - mindmap Chapter 1