Ns lecture2: Introduction to LAN Technology
Download as PPTX, PDF0 likes135 views
The document introduces LAN technology and networking standards, highlighting the OSI model which categorizes network communications into seven layers. It discusses various LAN technologies including Ethernet, Token Ring, ATM, FDDI, and Wireless, explaining their mechanisms and functionalities. The document also mentions organizations overseeing networking standards such as ANSI, IEEE, and ISO.
Ns lecture2: Introduction to LAN Technology
- 1. ECEG-4192 Computer Networks and Security Mr. Haftom Aregawi Introduction to LAN Technology
- 2. Introduction • Networking Standards and the OSI Model: • Networking Standards: • Standards are documented agreements containing technical specifications or other precise criteria that stipulate how a particular product or service should be designed or performed. Haftom Aregawi 2
- 3. Introduction… • Networking Standards and the OSI Model… • Networking Standard Organizations: • Few organizations which are responsible for a single aspect of network standards: • ANSI (American National Standards Institute) • EIA (Electronic Industries Alliance) and TIA (Telecommunications Industry Association) • IEEE (Institute of Electrical and Electronics Engineers) • ISO (International Organization for Standardization) • ITU (International Telecommunication Union) • ISOC (Internet Society)… Haftom Aregawi 3
- 4. Introduction… • Networking Standards and the OSI Model: • OSI Model: • The model commonly used to describe network communications is called the OSI (Open Systems Interconnection) Model O S I Open System Interconnection Haftom Aregawi 4
- 5. Introduction… • Networking Standards and the OSI Model… • OSI Model… • Is a theoretical representation of what happens between two nodes communicating on a network. • Divides network communications into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Haftom Aregawi 5
- 6. Networking Standards and the OSI Model… • OSI Model… Flow of data through the OSI Model
- 7. Networking Standards and the OSI Model… • OSI Model… Haftom Aregawi 7
- 8. Networking Standards and the OSI Model… • OSI Model… Data transformation through the OSI Model 8
- 9. Introduction to LAN Technology • The LAN technology will assist the devices on the network communicate with each other. • Types of LAN technology: i. Ethernet ii. Token Ring iii. Asynchronous Transfer Mode(ATM) iv. Fiber Distributed Data Interface(FDDI) v. Wireless Haftom Aregawi 9
- 10. Introduction to LAN Technology… • Types of LAN Technologies… • Ethernet: • It is a networking technology originally developed at Xerox in the early 1970s and improved by Digital Equipment Corporation, Intel, and Xerox. • It is a bus topology LAN technology with a collision-based mechanism for dealing with contention. Haftom Aregawi 10
- 11. Introduction to LAN Technology… • Types of LAN Technologies… • Ethernet: • Half-duplex Ethernet networks use an algorithm called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). • Note: Carrier Sense Multiple Access means the node before transmits a data, it checks or listens to the medium. • Example: Haftom Aregawi 11 Client 1 Client 2 Collision Occur Sends at the same time
- 12. Introduction to LAN Technology… • Types of LAN Technologies… • Token Ring: • It is a networking technology developed by IBM in the 1980s. It relies upon direct links between nodes and a ring topology. • It is a ring topology LAN technology with a token-passing mechanism for eliminating a contention. Haftom Aregawi 12
- 13. Introduction to LAN Technology… • Types of LAN Technologies… • ATM: • It is a high-speed, broadband transmission data communication technology based on packet switching, which is used by telecoms, long distance carriers, and campus-wide backbone networks to carry integrated data, voice, and video information. • FDDI: • A high-speed network technology, conforming to the Open Systems Interconnection (OSI) reference model for networking and the American National Standards Institute (ANSI) standard X3T9, which runs at 100 Mbps over fiber-optic cabling; often used for network backbones in a local area network (LAN) or metropolitan area network (MAN). Haftom Aregawi 13
- 14. Introduction to LAN Technology… • Types of LAN Technologies… • Wireless LAN(WLAN)): • It is a network that allows a devices to connect and communicate wirelessly. Haftom Aregawi 14
- 15. Introduction to LAN Technology… • Types of LAN Technologies… • Wireless: • Carrier Sense Multiple Access with Collision Avoidance(CSMA/CA) Haftom Aregawi 15
- 16. Introduction to LAN Technology… • LAN Technologies Standard: Haftom Aregawi 16
- 17. Introduction to LAN Technology… Haftom Aregawi 17
- 18. Introduction to LAN Technology… • Types of LAN Technologies… • LAN Technology Properties: • CSMA/CD • CSMA/CA • Broadcast • Collision • Bonding • Speed • Distance Haftom Aregawi 18
- 19. Introduction to LAN Technology…
- 20. Introduction to LAN Technology… Haftom Aregawi 20