1 / 27

Network Guide to Networks, Fourth Edition

Network Guide to Networks, 4e. 2. Objectives. Identify organizations that set standards for networkingDescribe the purpose of the OSI Model and each of its layersExplain specific functions belonging to each OSI Model layer. Network Guide to Networks, 4e. 3. Objectives (continued). Understand how two network nodes communicate through the OSI modelDiscuss the structure and purpose of data packets and framesDescribe the two types of addressing covered by the OSI Model.

naeva
Download Presentation

Network Guide to Networks, Fourth Edition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Network+ Guide to Networks, Fourth Edition Chapter 2 Networking Standards and the OSI Model

    2. Network+ Guide to Networks, 4e 2 Objectives Identify organizations that set standards for networking Describe the purpose of the OSI Model and each of its layers Explain specific functions belonging to each OSI Model layer

    3. Network+ Guide to Networks, 4e 3 Objectives (continued) Understand how two network nodes communicate through the OSI model Discuss the structure and purpose of data packets and frames Describe the two types of addressing covered by the OSI Model

    4. Network+ Guide to Networks, 4e 4 Networking Standards Organizations Standards: documented agreements containing technical specifications or other precise criteria stipulating how particular products or services should be designed or performed Define minimum acceptable performance

    5. Network+ Guide to Networks, 4e 5 ANSI American National Standards Institute (ANSI) Composed of more than a thousand representatives from industry and government Represents United States in setting international standards ANSI’s Web site (www.ansi.org)

    6. Network+ Guide to Networks, 4e 6 TIA Telecommunications Industry Association (TIA): Focuses on standards for information technology (IT), wireless, satellite, fiber optics, and telephone equipment

    7. Network+ Guide to Networks, 4e 7 EIA Electronic Industries Alliance (EIA): Trade organization composed of representatives from electronics manufacturing firms across US Sets standards for its members Helps write ANSI standards Lobbies for legislation favorable to growth of computer and electronics industries

    8. Network+ Guide to Networks, 4e 8 IEEE Institute of Electrical and Electronics Engineers International society composed of engineering professionals Goals are to promote development and education in electrical engineering and computer science Can purchase IEEE documents online from IEEE’s Web site (www.ieee.org)

    9. Network+ Guide to Networks, 4e 9 ISO International Organization for Standardization Collection of organization standards representing 146 countries Goal is to establish international technological standards to facilitate global exchange of information and barrier-free trade (www.iso.org)

    10. Network+ Guide to Networks, 4e 10 ITU International Telecommunication Union Regulates international telecommunications: Radio and TV frequencies Satellite and telephony specifications Networking infrastructure Tariffs applied to global communications Typically, documents pertain more to global telecommunications issues than to industry technical specifications

    11. Network+ Guide to Networks, 4e 11 ISOC Internet Society Professional membership society that helps to establish technical standards for the Internet Oversees groups with specific missions: Internet Architecture Board (IAB): Technical advisory group of researchers and professionals Interested in overseeing Internet’s design and management

    12. Network+ Guide to Networks, 4e 12 ISOC cont. Internet Engineering Task Force (IETF): Sets standards for how systems communicate over the Internet How protocols operate and interact

    13. Network+ Guide to Networks, 4e 13 IANA and ICANN Internet Protocol (IP) addresses: Addresses used to identify computers on the Internet and other TCP/IP-based networks

    14. Network+ Guide to Networks, 4e 14 Internet Assigned Numbers Authority (IANA): Used to keep records of available and reserved IP addresses and determines how addresses were doled out In 1997, coordinated efforts with three Regional Internet Registries (RIRs) Not-for-profit agency that manages distribution of IP addresses to private and public entities

    15. Network+ Guide to Networks, 4e 15 IANA and ICANN (continued) In late 1990s U.S. Department of Commerce (DOC) overhauled IP addressing and domain name management Internet Corporation for Assigned Names and Numbers (ICANN): Ultimately responsible for IP addressing and domain name management IANA still performs system administration

    16. Network+ Guide to Networks, 4e 16 Individuals and businesses lease addresses from Internet Service Provider (ISP) Business providing access to Internet and other services

    17. Network+ Guide to Networks, 4e 17 Understanding OSI All Programmers Seem To Need Data Processing Please Do Not Throw Sausage Pizza Away

    18. Network+ Guide to Networks, 4e 18 The OSI Model Open Systems Interconnection (OSI) Model: divides network communications into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application

    19. Network+ Guide to Networks, 4e 19 The OSI Model

    20. Network+ Guide to Networks, 4e 20 The General OSI Story A user or device initiates a data exchange Application Layer The Application Layer separates data into PDUs (protocol data units) pieces of data

    21. Network+ Guide to Networks, 4e 21 The General OSI Story cont. Application Layer PDU progresses to the Presentation Layer with a header and/or trailer added by the Application Layer Presentation Layer formats or translates the PDU so that various hosts with various applications can understand it

    22. Network+ Guide to Networks, 4e 22 The General OSI Story cont. The Presentation Layer also adds a header and/or trailer and then passes this info to the Session Layer The Session layer works to maintain communications between two nodes on a network. A Session is a connection for ongoing data exchange

    23. Network+ Guide to Networks, 4e 23 The General OSI Story cont. The Session Layer adds it’s own header and/or trailer and passes the info on to the Transport Layer The Transport Layer is in charge of making sure the message is delivered to the correct destination without errors

    24. Network+ Guide to Networks, 4e 24 The General OSI Story cont. The Transport Layer adds header/trailer and passes to Network Layer The Network Layer translates network address to a physical address and decides how to route the data – headers/trailers are added

    25. Network+ Guide to Networks, 4e 25 The General OSI Story cont. The Network Layer passes on to the Data Link Layer which divides the info into frames that can be passed to the Physical layer The “frames” have all required info regarding the sender, receiver, encryption, error checking, control info and actual data

    26. Network+ Guide to Networks, 4e 26 The General OSI Story cont. Network layer adds header/trailer and passes to Physical Layer Physical Layer takes frames from Data Link layer and generates voltage to transmit a signal. The Physical Layer is established by a NIC and cables or transmission media

    27. Network+ Guide to Networks, 4e 27 Communication Between Two Systems

    28. Network+ Guide to Networks, 4e 28 Applying the OSI Model

More Related