Open System Interconnection or OSI model Networking

Question: Discuss about the Open System Interconnection or OSI Model in Networking? Answer: OSI model: The Open System Interconnection or OSI model refers to a networking structure for the use of protocols in seven layers (Bora et al. 2014). In OSI model, the control over the data passes from one layer to another in the case of transmitting and receiving data over a network from physical to application and vice versa respectively. Figure 1.1: Seven Layers of OSI Model (Source: Bora et al. 2014) Communication Types: Metropolitan Area Network (MAN), Local Area Network (LAN), Wide Area Network (WAN), Inter-Network and Wireless Network are the differ types of communication that can occur in a network. Figure 1.2: Communication Types (Source: Bora et al. 2014) Peer-to-Peer and Client Server: Peer-to-Peer Client Server Cost No need for any dedicated server reduces the cost. The requirement of dedicated server makes it more expensive. Performance In a case of large clients causes some problems. Can handle up to 10 clients (Jin et al. 2013). The server is in the network to handle all the complicated computations and to share so large amount of clients is not an issue. Security Less secure. More secure due to server authentication needed. Advantage Easy to install. More reliable. Disadvantage Limited expandability. Maintain is costly. Analogy of Peer-to-Peer: Think of Walkie Talkies, a person can talk with everyone who is in between the range and there is no superior device to authenticate the calls. References: Bora, G., Bora, S., Singh, S. and Arsalan, S.M., 2014. OSI reference model: An overview.International Journal of Computer Trends and Technology (IJCTT),7(4), pp.214-218. Jin, Y., Yi, Y., Kesidis, G., Kocak, F. and Shin, J., 2013, April. Hybrid client-server and peer-to-peer caching systems with selfish peers. InINFOCOM, 2013 Proceedings IEEE(pp. 1744-1752). IEEE.