Question

sigma technology is a company based in singapore, with branches in 24 countries. it needs multiple cas in different locations to verify and sign digital certificates for the company. they are looking for an option where, even in the absence of a ca, other cas can issue the certificates. additionally, they are also looking for cas who will overlook other cas in different locations. in such a scenario, which pki trust model should they use?

distributed trust model
bridge trust mode
hierarchical trust model
web of trust model

question 22
2 pts
amtel university decides to keep a record of their student data in a backup server. the administrator contacts you to identify the right command interface protocol to be used in this. which command interface protocol should you advise?

ssl
tls
ssh
https

Explanation:

1. For the first question about Sigma Technology: In a hierarchical trust model, there is a top - level CA (root CA) that oversees other CAs (sub - CAs). If a CA is absent, other CAs in the hierarchy can still issue certificates as long as they are authorized by the root CA. This meets Sigma Technology's requirements.
2. For the second question about Amtel University: SSH (Secure Shell) is a network protocol used for secure data communication, remote command execution, and other secure network services between two network - connected devices. It is suitable for an administrator to manage a backup server and transfer student data securely. SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are mainly for securing connections like web traffic, and HTTPS (Hyper - Text Transfer Protocol Secure) is for secure web communication.

Answer:

Question 21: C. Hierarchical trust model
Question 22: C. SSH