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.
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Infrastructure and Connectivity
- At which layer of the OSI model does the Internet Protocol Security protocol function?
- 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?
- What is the recommended range of humidity level according to the ASHRAE?
- In order for network monitoring to work properly, you need a PC and a network card running in what mode?
- How many bits are used for addressing with IPv4 and IPv6, respectively?
- What protocol, running on top of TCP/IP, is often used for name registration and resolution with Windows-based clients?
- Which service(s), by default, use TCP and UDP port 22? (Choose all that apply.)
- Which of the following are multiport devices that improve network efficiency?
- Which of the following can be implemented as a software or hardware solution and is usually associated with a device—a router, a firewall, NAT, and so on—and used to shift a load from one device to another?
- Which of the following services use only TCP ports and not UDP? (Choose all that apply.)
- Which ports are, by default, reserved for use by FTP? (Choose all that apply.)
- IPv6, in addition to having more bits allocated for each host address, also has mandatory requirements built in for which security protocol?
- You're the administrator for Mercury Technical. A check of protocols in use on your server brings up one that you weren't aware was in use; you suspect that someone in HR is using it to send messages to multiple recipients. Which of the following protocols is used for group messages or multicast messaging?
- Which protocol is primarily used for network maintenance and destination information?
- You're explaining protocols to a junior administrator shortly before you leave for vacation. The topic of Internet mail applications comes up, and you explain how communications are done now as well as how you expect them to be done in the future. Which of the following protocols is becoming the newest standard for Internet mail applications?
- A socket is a combination of which components?
- You've been given notice that you'll soon be transferred to another site. Before you leave, you're to audit the network and document everything in use and the reason why it's in use. The next administrator will use this documentation to keep the network running. Which of the following protocols isn't a tunneling protocol but is probably used at your site by tunneling protocols for network security?
- Which protocol is unsuitable for WAN VPN connections?
- Most of the sales force have been told that they should no longer report to the office on a daily basis. From now on, they're to spend the majority of their time on the road calling on customers. Each member of the sales force has been issued a laptop computer and told to connect to the network nightly through a dial-up connection. Which of the following protocols is widely used today as a transport protocol for Internet dial-up connections?
- Which device is used to connect voice, data, pagers, networks, and almost any other conceivable application into a single telecommunications system?
- As more and more clients have been added to your network, the efficiency of the network has decreased significantly. You're preparing a budget for next year, and you specifically want to address this problem. Which of the following devices acts primarily as a tool to improve network efficiency?
- Which device stores information about destinations in a network?
- Upper management has decreed that a firewall must be put in place immediately, before your site suffers an attack similar to one that struck a sister company. Responding to this order, your boss instructs you to implement a packet filter by the end of the week. A packet filter performs which function?
- Which of the following devices is the most capable of providing infrastructure security?