IT Service Management System

Running head: ITSM AND SDLC
ITSM and SDLC
Name of the Student
Name of the University
Author Note:

1
ITSM AND SDLC
Table of Contents
Question 1........................................................................................................................................2
Question 2........................................................................................................................................4
References........................................................................................................................................8

2
ITSM AND SDLC
Question 1
OSI Protocol Stack and TCP/ IP
The OSI protocol stack involves presentation and session layers apart from the
application layer. However, the applications of TCP/ IP like FTP and Telnet do not comprise of
any separate layer. The TCP/IP application layer is the combination of three layers, which are
session, presentation and application. It is not required to separate these layers as TCP/ IP
applications do not possess any sort of clear differentiating points within protocols, interfaces
and services (Edwards & Bramante, 2015). Moreover, a layer of the model is both
connectionless and oriented with connection. As a result, it is not needed to distinguish session
and presentation layers separately.
The main advantages of incorporation of the OSI approach into TCP/IP are as follows:
i) It would become a generic model and would also act as the basic guidance tool for
proper development of any networking model.
ii) It would support both connectionless and connection oriented services as a result,
different layers are not required.
The main disadvantages of incorporation of the approach of OSI into TCP/IP are as
follows:
i) There would be an issue with the launching time, since OSI is basically a theoretical
model and does not always have considerations for the availability of proper technology (Alani,
2014).
ii) Moreover, the expense would be higher as the model would become highly complex.