Consider an example scenario where you want to send some merchandise to your fri
ID: 3874127 • Letter: C
Question
Consider an example scenario where you want to send some merchandise to your friend living in another city (the kind of friend and the kind of merchandise doesn't matter). You need to answer the following questions:
Example: For instance, we can have local post offices, regional post offices and some global delivery services. Their contracts are based on the amount of merchandise they send and receive.
d) Where the layers would be implemented (end-system, packet switches or both)? Discuss how the intermediate systems would process the parcels from source to destination? Again, make reasonable assumptions.
e) At the application layer, what are the things we can do to our merchandise? Should we use some protocol? Would this protocol be only implemented at the sender side?
f) In reference to the transport layer, we have TCP and UDP on the internet. Relate the basic services provided by them to our example. Which protocol should we use?
g) Explain and relate the concepts of IP addresses, MAC addresses, Sockets, Port numbers and Processes with our example scenario.
h) You need to explain and relate the application architectures, Client Server and the Peer-to-Peer for the merchandise delivery. Make reasonable assumptions where needed.
Explanation / Answer
d) The transport layer is responsible for end to end data transportation.The transport layer
is a conceptual division of the methods in the layered architecture of the protocols insisde
the network stack in IPS(Internet Protocol Suite) and the OSI(Open Systems Interconnection).
The implementation of TCP/IP model is the foundation of the Internet and OSI model for networking.
e) application interects with software appliction that implements a computing component.
It includes identification, determining resources, synchroizing communication.
f) For a data transmission we must use the TCP protocol because it maintain the three way handshaking
and make record of the data which are send or not. In UPD the ACK of the data sent is not come to the
sender so we can not know is the data is sent or not.
g) The concept of the IP addresses is use to give the user a personal address to make unique identification.
The MAC address is a unique number which is stored in the board of the computer it's a unique number of all the user.
The mac is also used as the address for communication.
h) A peer-to-peer network is been created when there are two or more PCs which are connected and are sharing resources without
going through a seperate server computers. A P2P network can consists of an ad-hoc connection which will be established with
the help of the Universal Serial Bus(USB) to carry on the transfer of the files.
P2P network is a network on a highly grander scale in which use of only special protocols and the applications are setting up
direct relationships among users over the Internet.
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