Task 2: (40 Marks) Each student needs to do a literature review of virtualization of network services and congestion control algorithm used in computer networks. In this regards, student needs to write a summary in report form. The summary report should not be more than 400 words, and complete the following tasks as part of summary report. Task 2.1: Types of network service virtualization with suitable diagram and its benefits. (20 Marks) Task 2.2: Compare and contrast between the congestion controls algorithms used in computer networks. (20 Marks)