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OSI Layers on the N+

Discussion in 'Network+' started by Luddym, Mar 22, 2006.

  1. Luddym

    Luddym Megabyte Poster

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    Reading my Sybex book on OSI tonight, it says that . . . .
    'Layers session, presentation, application' will not be on the Network+ Exam.

    I've just looked at the Objectives and there it says . . . 'Identify the seven layers of the OSI model, and their functions.'

    Has anyone who took the exam, remember if they had any questions on these 3 layers?

    I know it's asking a lot though, so no worries guys if the answer is a big 'i duuno.' :)
     
    Certifications: VCP,A+, N+, MCSA, MCSE
    WIP: Christmas Drunkard
  2. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    Yes - all 7 layers appeared in my exam. (IIRC I was asked what sort of things happened in the Presentation layer).

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  3. Luddym

    Luddym Megabyte Poster

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    :D Cheers for that.
     
    Certifications: VCP,A+, N+, MCSA, MCSE
    WIP: Christmas Drunkard
  4. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

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    Shame on Sybex for saying that. :blink
     
    Certifications: A+ and Network+
  5. twizzle

    twizzle Gigabyte Poster

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    Ok ludd hopes this helps ya... I've made a table to help me with the OSI.

    7- Application DEVICE-Gateways PROTOCOLS- NCP, SMB, NCP
    DESCRIPTION- Where redirector services are run, and application protocols such as POP3 SMTP and FTP work.

    6-Presentation DEVICE-Gateways PROTOCOLS- NCP DESCRIPTION- Responsible for data encryption, compression and formatting

    5-Session DEVICE- Gateways PROTOCOLS-NETBIOS, SAP,
    DESCRIPTION- Manages the data sessions between network devices.

    4-Transport DEVICE-Gateways PROTOCOLS-TCP, UDP, NETBEUI, SPX
    DESCRIPTION- Controls the reliable transmission and transfer of data packets. Manages the data flow and performs fragmentation / defragmentation.

    3-Network DEVICE-Router, Brouters, pROTOCOLS-IP, IPX, DHCP, ARP, RIP, OSPF, ICMP, RARP. NLSP
    DESCRIPTION- Responsible for the routing and addressing of traffic. Uses logical IP addressing (IP address) and frame (datagram) sequencing

    2-Data Link DEVICES-Switches, Bridges, WAP,Brouters VLAN, MAC, LLC,
    DESCRIPTION- Responsible for CRC checking and generation, sets rules for addressing network devices, performs flow control and frame synchronisation. MAC addresses are layer 2.

    1-Physical DEVICES-Hubs, Repeaters, Media converters, NICs, WAP PROTOCOLS-Ethernet, Token Ring, DESCRIPTION-The layer responsible for the electrical, physical and media specifications of the network. It covers the hardware involved.

    Well was sposed to be a table but couldnt cut and paste its layout right......

    I know on the practice tests i've used there have been some (only a few) questions on layers 6 & 7 as well as the usual ones on 1 to 4.
     
    Certifications: Comptia A+, N+, MS 70-271, 70-272
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  6. Luddym

    Luddym Megabyte Poster

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    That's great Twizz. Thanks for that, looks like it will definately help. :)
     
    Certifications: VCP,A+, N+, MCSA, MCSE
    WIP: Christmas Drunkard

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