During your study of T215B, you have been introduced to a set of concepts, protocols and threats to network security. Based on this information as well as the internet and other resources (e.g., books and AOU e-library), write a short report explaining th

During your study of T215B, you have been introduced to a set of concepts, protocols and threats to network security. Based on this information as well as the internet and other resources (e.g., books and AOU e-library), write a short report explaining the following factors:
 Overview of the IPsec protocol.(6 marks)
 Comparison between Caesar cipher using diagraph coding and Vigenère Cipher in terms of their operation and level of security (6 marks).
 Description of Message Digest Algorithm 5 (MD5). (6 marks)
 Explanation for the two different approaches for doing Block encryption with stating their features and drawbacks for each approach.