Question

Protocols (8 points) Aliens have tampered with your computer! They garbled some of the software responsible for your internet communica tions. You know that only one of the layers of the protocol stack has been affected. Which layer would you suspect in each of the following scenarios? a. You can view the source of HTML pages, but they don't display properly. b. You cannot seem to connect to any other computer at all. c. You can ping a computer across the country, but when you try to transfer a whole file it gets scrambled up. d. You can only connect to the hosts that are on your local area network, and no others.

Answer 1

a.) Presentation Layer

The reason is that the presentation layer is responsible for displaying or presenting the data in one format to the another in a particular period.

b.) Session Layer

The reason is that the session layer is known for setting up the co-ordinates and terminating connections. IT handles all of the protocols like TCP,UDP,etc. which will be responsible for providing services to most of the applications.

c.) Transport Layer

The reason is that the transport layer is known for managing the packetization of the data and then the delivery of the packets, which will include the checking for the errors in the data as it arrives.It works with many services like TCP,UDP,etc.

d.) Data Link Layer

The reason is that this layer is known for linking across the physical networks which will help in putting the packets into the network frames. The layer will consists of the Logical Link Layer & Media Access Control Layer. Hence, it will handle all the connections with LAN.

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