Justification for ensuring no Connections to the External Network
In the current world, the open nature of internet accessibility makes it critical for organizations to pay attention to the safety of their systems and networks. Many businesses are conducting their business functions in the open public networks. According to (Malic 2003), the new trend has left many businesses vulnerable to illegal monitoring, cyber crimes and other internet-related crimes. In this case, it is essential to take precautions to prevent unauthorized data accessibility and compromising. For this reason, network administrators should ensure that all loopholes that increase vulnerability to hacking are identified and removed accordingly. One way of doing this is to dispatch host networks from all external or public networks, p.513. In addition, (Malic 2003) warns that network access by disgruntled employees and hackers can cause destruction of data that may lead to poor productivity and exposes the company to unprecedented competition.
Ciphertext vs. Plaintext
It is unethical to read the content of a postcard. In this case, plaintext is equated to unsealed postcard. According to Pfleeger, Pfleeger (2012), plaintext is a data that a sender transmits to a receiver with attached operations reference (synonym) and therefore, the information is stored unencrypted. Though plaintext is electronically vulnerable in storage and usage, Pfleeger, Pfleeger (2012) declare that physical security ought to be engaged to pervert data theft, damage or unauthorized access. Accessing the information on the plaintext will automatically enable unauthorized persons to access the cipher text and hence it is unethical to read the postcard. In this case, the assumption is that the postcard explains the letter in the envelop.
Reference
Malik, S. (2003). Network security principles and practices: CCIE professional development. Indianapolis, Ind.: Cisco ;.
Pfleeger, C., & Pfleeger, S. (2012). Analyzing computer security: A threat/vulnerability/countermeasure approach. Upper Saddle River, NJ: Prentice Hall.