Which connection does the OSI model support in networking?

Q.  Which connection does the OSI model support in networking?
- Published on 23 Sep 15

a. Connection-oriented
b. Connectionless
c. Both a and b
d. None of the above

ANSWER: Both a and b


  • Prajakta Pandit   -Posted on 19 Oct 15

    - OSI model support both connectionless and connection-oriented services in networking.

    Connection-oriented Service :

    - The connection oriented services establish a dedicated connection.

    - The establishment of connection may take place on the physical level or logical level.

    - This type of connection establishment needs some kind of signaling and some form of resources reservation such as, bandwidth.

    - After the connection establishment, the actual data transfer will take place and after the exchange of data the connection is cleared or broken.

    - A connection oriented service is also called as 'reliable' network service.

    - The connection oriented services are reliable because there is a minimization of data loss and retransmission of lost bits is possible.

    - It is guaranteed that data will arrive in the same order.

    - Connection oriented services set up virtual links between end systems through a network.

    - Connectionless Service :

    - The connectionless service does not require a connection to be established in order to exchange data.

    - It used to transfer data at the transport layer (Layer 4) of the OSI model.

    - In connectionless services for exchanging data there is no need to reserve any resources.

    - Connectionless service cannot provide any service guarantee.

    - In connectionless service, the routing infrastructure can face bottleneck problem due to overloading.

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