Re: ||| VuHelp4U ||| lets discuss cs610 question number 2

but brother ... how FRAME relay uses ATM Technology?

On Tue, Jun 5, 2012 at 4:00 AM, +!~Whats myfault?+!~
<whatsmyfault1@gmail.com> wrote:
> muMmm... it AlSoo SEems goOod ....
>
> On Mon, Jun 4, 2012 at 9:25 PM, MOAAZ SIDDIQ <moaaz.pk@gmail.com> wrote:
>> i have written Frame Relay Technology
>>
>> ATM vs Frame Relay
>>
>> Data link layer of OSI model defines the ways of encapsulating data for
>> transmission between two endpoints and the techniques of transferring the
>> frames. Both Asynchronous Transfer Mode (ATM) and Frame relay are data link
>> layer technologies and they have connection oriented protocols. Each
>> technique has its own application dependent advantages and disadvantages.
>>
>> Asynchronous Transfer Mode (ATM )
>>
>> ATM is a network switching technology that uses a cell based methodology to
>> quantize data. ATM data communication consists of fixed size cells of 53
>> bytes. An ATM cell contains a 5 byte header and 48 bytes of ATM payload.
>> This smaller size, fixed-length cells are good for transmitting voice, image
>> and video data as the delay is minimized.
>>
>> ATM is a connection oriented protocol and therefore a virtual circuit should
>> be established between sending and receiving points. It establishes a fixed
>> route between two points when the data transfer starts.
>>
>> Another important aspect of ATM is its asynchronous operation in time
>> division multiplexing. Therefore cells are transmitted only when data is
>> available to be sent unlike in conventional time division multiplexing where
>> synchronization bytes are transferred if there data is not available to be
>> sent.
>>
>> ATM is designed to be convenient for hardware implementation and therefore
>> processing and switching have become faster. Bit rates on ATM networks can
>> go up to 10 Gbps. ATM is a core protocol used over the SONET/SDH backbone of
>> the ISDN.
>>
>> ATM provides a good quality of service in networks where different types of
>> information such as data, voice, and are supported. With ATM, each of these
>> information types can pass through a single network connection.
>>
>> Frame Relay
>>
>> Frame relay is a packet switching technology for connecting network points
>> in Wide Area Networks (WAN). It is a connection oriented data service and
>> establishes a virtual circuit between two end points. Data transfer is done
>> in packets of data known as frames. These frames are variable in packet size
>> and more efficient due to flexible transfers. Frame Relay was originally
>> introduced for ISDN interfaces though it is currently used over a variety of
>> other network interfaces as well.
>>
>> In frame relay, connections are called as 'Ports'. All the points which need
>> to connect to the frame relay network needs to have a port. Every port has a
>> unique Address. A frame is made of two parts which can be called as 'actual
>> data' and the 'frame relay header'. Frame architecture is same as defined
>> for LAP-D (Link Access Procedures on the D channel) which has a variable
>> length for information field. These frames are sent over Virtual
>> Connections.
>>
>> Frame relay can create multiple redundant connections among various routers,
>> without having multiple physical links. Since frame relay is not specific
>> for media, and provides means to buffer speed variations, it has the
>> possibility to create a good interconnect medium between different types of
>> network points with different speeds.
>>
>>
>> Read more:
>> http://www.differencebetween.com/difference-between-atm-and-vs-frame-relay/#ixzz1wqFTTQi8
>>
>>
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