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How session layer in OSI model is responsible for Synchronisation and recovery?

Posted By :Abhisek Panda     Posted Date :January 30, 2010    Points :10   Category :Networking 
Session layer creates certain check points while transmitting volumes of data in a sequence. When there is a problem in the transmission in the middle of any bulk of data, transmission will take place from the check point where it was left. This function of Session layer is called Synchronisation and recovery.

You can also find related Interview Question to How session layer in OSI model is responsible for Synchronisation and recovery?  below: 

Synchronisation and Recovery in OSI model happens in which layer?

  
Synchronisation and Recovery in OSI model happens in Session layer. Session layer is also responsible for Token Management. (More...)

Which layer of OSI reference model is responsible for 'Encryption & Decryption' and 'Compression & Decompression'?

  
Presentation layer of OSI model is responsible for 'Encryption & Decryption' and 'Compression & Decompression' for data security. (More...)

What are the things we have to follow when switching from the SIMPLE recovery model to the FULL or BULK-LOGGED recovery model ?

  
1. Once we complete the switching to the FULL or BULK-LOGGED recovery model, we have to take a full or differential database backup to start the log chain.

2. Then only it takes effect after the first data backup.

3. Schedule regular log backups and update your restore plan accordingly to maintain high-availability/Disaster recovery
(More...)

What are the things we have to follow when swithing from FULL or BULK-LOGGED to SIMPLE recovery model ?

  
1. Before switching from FULL or BULK-LOGGED recovery model, We have to take LOG Backup immediately before switching to SIMPLE.

2. It will help us to recover Point-In-Time(If any)

3. Finally, we can switch to SIMPLE recovery model. (More...)

What are the major data structures used in RDBMS, Network data model & Hierarchical data model.

  
RDBMS - Array (i.e. Array of structures)
Network data model - Graph
Hierarchical data model - Trees (More...)

What is Data Model?

  
A collection of conceptual tools for describing data, data relationships data semantics and constraints. (More...)

What is E-R model?

  
This data model is based on real world that consists of basic objects called entities and of relationship among these objects. Entities are described in a database by a set of attributes. (More...)

What is Object Oriented model?

  
This model is based on collection of objects. An object contains values stored in instance variables with in the object. An object also contains bodies of code that operate on the object. These bodies of code are called methods. Objects that contain same types of values and the same methods are grouped together into classes. (More...)

Differences between application and session.

  
The session object maintains state on a per client basis whereas the application object is on a per application basis and is consistent across all client requests. (More...)

Session state vs View state

  
In some cases, using view state is not feasible. The alternative for view state is session state. Session state is employed under the following situations:
. Large amounts of data - View state tends to increase the size of both the HTML page sent to the browser and the size of form posted back. Hence session state is used.
. Secure data - Though the view state data is encoded and may be encrypted, it is better and secure if no sensitive data is sent to the client. Thus, session state is a more secure option.
. Problems in serializing of objects into view state - View state is efficient for a small set of data. Other types like DataSet are slower and can generate a very large view state (More...)

what is different between session and application

  
session is a object that store information between http request for a paticular user.
->But application object are global for each user (More...)

How to remove a Session variable?

  
using HttpSessionState.Remove(); (More...)

How do you explicitly kill a user session?

  
To kill Session you have to use Session.Abandon() with this method we can explicitly kill a user session. (More...)

Is the session Timeout attribute a sliding timeout value?

  
The session Timeout is a sliding expiration time, meaning whever your page access session state, the expiration time will be moved forward. Please note that as long as a page has NOT disabled session state, it will access the session automatically when requested.


Regards
Santosh
http://santoshdotnetarena.blogspot.com/ (More...)

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