When troubleshooting SSL, which two layers of the OSI model are of most value?

When troubleshooting SSL, which two layers of the OSI model are of most value?

a. Application layer and presentation layer
b. Presentation layer and session layer
c. Application layer and transport layer
d. Physical layer and data link layer



Answer: C

SSL connections occur between the application and transport layers. Answer A is incorrect because SSL operates at a deeper level. Answer B is incorrect because the Secure Sockets Layer transport effectively fills the same role as these OSI model layers. Answer D is incorrect because the data has been abstracted beyond the level at which SSL operates.

At which layer of the OSI model does the Internet Protocol Security protocol function?

At which layer of the OSI model does the Internet Protocol Security protocol function?

a. Network layer
b. Presentation layer
c. Session layer
d. Application layer



Answer: A

IPsec validation and encryption function at the network layer of the OSI model. Answers B, C, and D are incorrect because IPsec functions at a lower level of the OSI model.

You want to implement a technology solution for a small organization that can function as a single point of policy control and management for access to Internet content. Which of the following should you choose?

You want to implement a technology solution for a small organization that can function as a single point of policy control and management for access to Internet content. Which of the following should you choose?

a. Proxy gateway
b. Circuit-level gateway
c. Application-level gateway
d. Web security gateway



Answer: D

Web security gateways offer a single point of policy control and management for web-based content access. Answer A is too generic to be a proper answer. Answer B is incorrect because a circuit-level gateway's decisions are based on source and destination addresses. Answer C is incorrect because an application-level gateway understands services and protocols.

What is the recommended range of humidity level according to the ASHRAE?

What is the recommended range of humidity level according to the ASHRAE?

a. 10% to 20%
b. 30% to 40%
c. 40% to 55%
d. 55% to 65%



Answer: C

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) recommends optimal humidity levels in the 40% to 55% range, making answers A, B, and D incorrect. Very low levels of humidity can promote the buildup of electrostatic charges that can harm sensitive electronic components. Very high levels of humidity can promote condensation on chilled surfaces and introduce liquid into operating equipment.