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~~~~~ 2nd Lecture - Networking ~~~~


k2s

Entha mandiki kavali  

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[quote author=!!!! FeRRo !!!! link=topic=232200.msg2880138#msg2880138 date=1314830582]
OSI layers very easy to remember

from botton to top



Away
Pizza
Sausage
Throw
Not
Do
Please
[/quote]

i always suggest not to use short -cuts to remember something to remember

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[quote author=k2s link=topic=232200.msg2880139#msg2880139 date=1314830641]
i always suggest not to use short -cuts to remember something to remember
[/quote]

@gr33d  but for some people its easy baa  S%Hi  ...including my self

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[quote author=k2s link=topic=232200.msg2880149#msg2880149 date=1314830789]
emaina ardam ayinda ??
[/quote]yes
idi vini vini chala sarlu alavatu aipoyindhi


bridging ante ento chepu  cry@fl

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Lets talk briefly abt 7 layers

Layer 7 : The application layer interacts with software applications (such as Netscape or Outlook Express) that implement a communicating component. Such application programs are outside of the scope of the OSI model, but they translate an enduser's typing into a Layer 7 request. Application layer functions typically include the following:

Identifying communication partners - The application layer identifies and determines the availability of communication partners for an application with data to transmit.

Determining resource availability - The application layer must determine whether sufficient network resources for the requested communication are available.

Synchronizing communication - Communication between applications requires cooperation that is managed by the application layer.

Example: The Application layer is responsible for identifying that there is a web server answering on port 80 in order for HTTP communication to happen.

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[quote author=ROBO link=topic=232200.msg2880154#msg2880154 date=1314830862]
yes
idi vini vini chala sarlu alavatu aipoyindhi


bridging ante ento chepu  cry@fl
[/quote]

1st morning lechi brush cheyyakunda, lunch chesthava ?

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The presentation layer provides a variety of encoding and encryption functions that are applied to the application layer data. These functions ensure that information sent from the application layer of one system will be readable by the application layer of another system. Some examples of presentation layer encoding and encryption schemes follow:

Conversion of character representation formats - Conversion schemes are used to exchange information with systems using different text and data representations (such as EBCDIC and ASCII).
Common data representation formats -the use of standard image, sound, and video formats (like JPEG, MPEG, and RealAudio) allow the interchange of application data between different types of computer systems.
Common data compression schemes - The use of standard data compression schemes (like WinZip or GZip) allows data that is compressed at the source device to be properly decompressed at the destination.
Common data encryption schemes - The use of standard data encryption schemes allows data encrypted at the source device to be properly unencrypted at the destination.

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The session layer establishes, manages, and terminates communication sessions between presentation layer entities. Communication sessions consist of service requests and service responses that occur between applications located in different network devices. These requests and responses are coordinated by protocols implemented at the session layer.

For example, SQL is a Session layer application that manages multiple queries to the SQL database. It's what allows multiple people to log in to, say, the Intranet at the same time.

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[quote author=k2s link=topic=232200.msg2880164#msg2880164 date=1314830998]
1st morning lechi brush cheyyakunda, lunch chesthava ?
[/quote] sFun_duh repu naku deni meda clala pani undhi  cry@fl

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[quote author=ROBO link=topic=232200.msg2880174#msg2880174 date=1314831078]
sFun_duh repu naku deni meda clala pani undhi  cry@fl
[/quote]cheptha.... brief ga 7 layers gurinchi telika potey.... bridges, switches, etc ee layer lo pani chesthayoo ardam kavu

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[quote author=k2s link=topic=232200.msg2880179#msg2880179 date=1314831189]
cheptha.... brief ga 7 layers gurinchi telika potey.... bridges, switches, etc ee layer lo pani chesthayoo ardam kavu
[/quote]kk  #4H#

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