Question

1. What is end-system? List example of end-systems 2. Define network edge and network core 3. Explain Packet-switching 4. List five tasks that a computer network layer can perform Is it possible that one (or more) of these tasks could be performed by two (or more) layers? 5. This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking. Consider two hosts, A and B, connected by a single link of rate R bps. Suppose that the two hosts are separated by m meters, and supposse the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to Host B a. Express the propagation delay, d, in terms of m and s b. Determine the transmission time of the packet, dtrans, in terms of L and R c. Ignoring processing and queuing delays, obtain an expression for the end-to-end delay d. Suppose, s-2.5*10^8 m/s, and L-120bits, and R=56kbps Find the distance m so that dprop equals dtrans

Answer 1

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Q1.
Answer)
Generally, in computer networking, the end systems are the computers which are connected to the network of the computers, and the end systems are typically referred so as they are sitting at the edge of the network. The end-user has access to the end systems and thus interacts with the end system. The end system provides much information or in many cases certain services.
For example, the end systems can be the Internet hosts which are connected to the Internet and are hosting Internet applications such as the web browser or email program. Thus the end systems on the network connections are actually the systems which are connected at the endpoint of the network.