Assignment On Department Of Computing And Information Technology

Enterprise Communications – Practical Activity
Department of
Computing and Information Technology
EnterpriseWeb Authoring
Semester 2, 2019
Version 1.0: 6/10/2022
ICT50415 Diploma of Information Technology Networking
Competencies
 ICANWK501: Plan, implement and test enterprise communication solutions
 ICTTEN512: Design and implement an enterprise voice over internet protocol and a
unified communications network
 ICTNWK505: Design, build and test a network server
 Submit your assessment items by the specified dates
 Present material according to IT Dept. standards
specified.
 Practical activities are to be noted down in the student
journals specifically for this subject. Marks will be
allotted according to the practical and the write up.
Introductory Activity – Assessed as a Prac in-class activity
As completed. Refer to subject outline.
Tools & Windows Based Computer(s) with Virtualisation Environment
Grade A satisfactory assessment.
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Enterprise Communications – Practical Activity
Practical (VoIP Knowledge) Exercise 7
Aim
The aims of this exercise are to examine the various Protocols and Codecs that are used
in VOIP Applications. In addition, we will:
o Investigate exactly what VoIP is
o Define the terms “Protocols” and “Codecs”
o Identify the protocols and codecs commonly in use in VoIP systems
o Identify the hardware that is commonly implemented in VoIP systems
Note that this is a research and documentation activity. As such this is classified as an
“Exercise” rather than a Practical Exercise.
The written results to this exercise will need to be completed in a Word Document that is
emailed to your assessor after the exercise is set.
This exercise will be completed within a VMware Workstation 12.x Environment.
You must maintain an error log sheet and mention how you troubleshot the issues.
Activity 1
In this activity you will research exactly what “VoIP” is, and why VoIP is replacing
traditional analogue PSTN systems.
1. Read the following articles:
a. http://www.voip-info.org/wiki/view/What+is+VOIP
b. http://www.voip-sip.org/what-is-voip/
c. http://voip.about.com/od/voipbasics/u/VoIPBasicsUP.htm
2. Answer and fully explain your answers to the following questions:
1. Describe the key features of network Operating System?
2. Based on the articles above, how would you explain what is VoIP?
3. Why is VoIP preferred over POTS? Why has VoIP become so popular?
4. What are some of the advantages of VoIP over POTS?
5. What are some of the disadvantages of VoIP over POTS?
6. What is the “PSTN”? How does it work?
7. How is a PSTN different to a VoIP system?
8. What is a trunk? Explain.
9. Why are traditional Analogue PSTN trunks limiting?
10. What is a PBX?
11. What sort of resources do you need to implement a VoIP system?
12. Why do we need to use compression with VoIP systems?
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Enterprise Communications – Practical Activity
13. What is a “Codec”? List the most common “codecs” in use with VoIP systems,
detailing some of the features of each.
14. List and briefly explain the 5 most common protocols in use for VoIP systems
15. Investigate factors affecting bandwidth and calculate bandwidth usage for above
mentioned codecs, including considerations of overhead, connection quality and
connection speeds
Note that this course will primarily deal with the H.323/SIP and H.248/MGCP
Protocols
Activity 2
In this activity we will examine the H.323/SIP and H.248/MGCP Protocols in a little more
detail.
 Read the following article:
 http://www.packetizer.com/ipmc/papers/understanding_voip/voip_protocols.html
 Answer and fully explain your answers to the following questions:
 What is a “real time protocol” and how do they differ from operation with regards
to “normal” protocols?
 Referring to RFC’s 3550 and 3551 (available as links in the first article) explain
the differences and functions of the RTP and RTCP.
 Detail how the SIP protocol works.
 What are some of the limitations of the SIP protocol?
 What are the differences between SIP and MCGP?
 What form of Protocol does “Skype” use?
 Document your results in your Journal and email these to your teacher.
Activity 3
In this activity we will research and analyse the terms “Protocols” and “Codecs” as they
relate to VoIP systems. In particular, we will identify and describe some of the key
features of the main protocols and codecs employed in VoIP communication systems.
 Answer the following questions, providing web references (where appropriate) with
each answer:
 List (and briefly detail) the major protocols utilised under VoIP systems.
 How do Codecs differ from Protocols?
 List the major codecs in use in VoIP systems. List the major features of each
codec.
 Detail the advantages and disadvantages of each codec.
Activity 4
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