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    Topic:SLIP&PPP Submitted To:-Submitted By

    Uploaded by

    Girish Sahare
    1. The document discusses the Serial Line IP Protocol (SLIP) and Point-to-Point Protocol (PPP) for connecting a workstation to the internet over a dial-up modem connection. 2. PPP was developed to improve upon issues with SLIP such as lack of error detection, only supporting IP, inability to dynamically assign addresses, and lack of authentication. 3. PPP uses a multi-layered protocol stack including the Link Control Protocol (LCP) for link establishment and maintenance, authentication protocols, and Network Control Protocols (NCP) to carry network layer data.

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    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd

    Topic:SLIP&PPP Submitted To:-Submitted By

    Uploaded by

    Girish Sahare
    29 views13 pages
    1. The document discusses the Serial Line IP Protocol (SLIP) and Point-to-Point Protocol (PPP) for connecting a workstation to the internet over a dial-up modem connection. 2. PPP was developed to improve upon issues with SLIP such as lack of error detection, only supporting IP, inability to dynamically assign addresses, and lack of authentication. 3. PPP uses a multi-layered protocol stack including the Link Control Protocol (LCP) for link establishment and maintenance, authentication protocols, and Network Control Protocols (NCP) to carry network layer data.

    Original Description:

    protocols

    Original Title

    SLIP&PPP

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    1. The document discusses the Serial Line IP Protocol (SLIP) and Point-to-Point Protocol (PPP) for connecting a workstation to the internet over a dial-up modem connection. 2. PPP was developed to improve upon issues with SLIP such as lack of error detection, only supporting IP, inability to dynamically assign addresses, and lack of authentication. 3. PPP uses a multi-layered protocol stack including the Link Control Protocol (LCP) for link establishment and maintenance, authentication protocols, and Network Control Protocols (NCP) to carry network layer data.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    29 views13 pages

    Topic:SLIP&PPP Submitted To:-Submitted By

    Uploaded by

    Girish Sahare
    1. The document discusses the Serial Line IP Protocol (SLIP) and Point-to-Point Protocol (PPP) for connecting a workstation to the internet over a dial-up modem connection. 2. PPP was developed to improve upon issues with SLIP such as lack of error detection, only supporting IP, inability to dynamically assign addresses, and lack of authentication. 3. PPP uses a multi-layered protocol stack including the Link Control Protocol (LCP) for link establishment and maintenance, authentication protocols, and Network Control Protocols (NCP) to carry network layer data.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    You are on page 1of 13

    Topic:SLIP&PPP

    Submitted to:Mr.Navdeep Bhandari

    Submitted by:Charu
    Harpreet
    Ankita
    Geetika

    SERIAL LINE IP PROTOCOL:Connect a workstation to the internet over a dialup line using a modem. The workstation sends
    raw IP packets over the line with a flag byte at
    the end for framing
    PROBLEM WITH SLIP PROTOCOL
    1

    .Error detection.
    2 .It supports only IP.

    3.It is not

    possible to dynamically assign the


    address during the set up.
    4.Slip does not provide any Authentication.
    So neither party knows whom it is talking to
    5.It is not approved internet standard.

    POINT TO POINT PROTOCOL


    This protocol is used by millions of internet users to
    connect their home computers to the server of an
    internet service provider. Most of these users have
    traditional modem.

    SERVICES PROVIDED BY PPP:-

    The PPP protocol can operate over a full duplex point to point
    transmission link as well as over asynchronous links, the PPP
    was an improvement over the SLIP.

    TRANSITION STATES:1.DEAD:-It means that the link is not being used .


    2.ESTBLISHING:-When one of the end machine
    starts the communication, the connection goes into the
    establishing state.
    3.AUTHENATICATING:-The user sends the
    authenticate request packet & includes the user name
    & password.
    4.NETWORKING:-The exchange of user control and
    data packets can started.
    5.TERMINATING:-The users sends the terminate the
    link. With the reception of the terminate.

    PPP STACK
    PPP is a data link protocol. But it uses stack of other protocols in order to
    establish the link, to authenticate
    the users and to carry the network layer data.
    1.Link Control Protocol (LCP).
    2.Authenticating Protocols .
    3.Network Control Protocols (NCP).

    FLAG

    ADDRESS CONTROL

    PROTOCOL PACKET FROM FCS FLAG


    ONE OF THE
    PROTOCAL
    STACK

    FRAME FORMAY OF PPP


    FLAG:-The PPP frame always begins & Ends with the standard HDLC
    Flag
    ADDRESS:-Since PPP is used for a point to point connection , it uses
    the broadcast address of HDLC to avoid a data link address in the protocol.
    CONTROL:-This field uses the format of the u-frame in

    HDLC. The value is 00000011 to show that the frame does not
    contain any sequence numbers and that thereis no flow or
    error control.
    PROTOCAL:-It defines what is being carried in the data field .
    DATA FIELD:-It carries the user data or other information.

    FCFS:-The field is simply a2 or 4 byte. The


    PPPprotocolprovides many useful capabilities with
    the help of a LCP and the network control protocol.

    LINK CONTROL PROTOCOL(LCP)


    One of the protocol in the protocol stack is (LCP). The
    responsibility of LCP are as under:
    (i) To Establish Links.
    (ii) To maintain the establish links.
    (iii) To configure the links.
    (iv) Termination of the links.
    Its also provide negotiation mechanisms. It may be noted that
    both the users should agree on the various options before
    establishing a link.

    FLAG

    ADDRESS CONTROL

    CODE

    PROTOCOL

    ID

    DATA

    LENGTH

    FCS

    FLAG

    INFO FOR
    LCP
    PACKETS

    LCP PACKET
    The LCP packets are carried in the data field of PPP frame.
    The value in the protocol field indicates that the data field is
    carrying the LCP packets.

    THE VARIOUS FIELDS IN LCP:1.CODE:-It is one byte length field.

    2.ID:-It is one byte length field which holds a value used to


    match a request with the reply.
    3.LENGTH:-It is a two byte long field which defines the
    length of entire LCP packets.
    4.INFORMATION:-It consists extra information needed for
    some LCP packets.

    CATEGORIZATION OF LCP PACKETS


    CONFIGURATION PACKETS
    LINK TERMINATION PACKETS
    LINK MONITORING AND DEBUGING PACKETS

    AUTHENTICATION PROTOCOLS
    Validate the identify of a user who needs to access
    the set of resources. These are two protocols
    created by PPP for authentication purpose
    namely:
    1. PAP
    2. CHAP
    These protocols are used during authentication
    state and during this state, no user data are
    exchanged.

    NETWORK CONTROL PROTOCOL(NCP)


    The next step after link establishment
    &authentication is getting connected to the
    network layer.PPPuses another protocol called
    Network Control.

    THE
    END

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