Question 4 Q.4.1 Using an example, briefly discuss why digital signatures are implemented in communications. (Marks: 30) (4) Q.4.2 In the context of the Internet and security, provide an example where integrity is breached. (5) Q.4.3 Briefly explain how a web browser contributes to the operation of the web and give an example of a web browser. (5) Q.4.4 Using examples, differentiate between phishing and spam security threats: (6) Q.4.5 Consider the web page snippet provided below and answer the questions that follow. My Module INFU112 C:\Users\User\Desktop\INFU.html Q.4.5.1 Give the file name of the above web page. Q.4.5.2 Give the title of the above web page. Q.4.5.3 Write the HTML code to produce the web page as seen in the diagram (2) (2) (6) above. END OF PAPER