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NEW QUESTION: 1
KGraphix, a small, privately owned publishing company, plans to upgrade its printing process by purchasing either a high-speed color laser printer or a webpress (a high speed color printing machine).
Incremental cash flow information for each piece of equipment is as follows:
Assuming that the company's weighted average cost of capital (WACC) is 13 percent, which of the following statements is most correct? KGraphix should purchase the:
A. color laser printer because it has the highest equivalent annual annuity.
B. webpress because it has the longest life and the highest net present value (NPV).
C. webpress because its net present value (NPV) of $9,939 is greater than the color laser printer's NPV of
$7,223.
D. color laser printer because its Internal rate of return (IRR) is higher than that of the webpress.
Answer: A
Explanation:
Explanation/Reference:
Explanation:
Here, we have two projects with unequal lives, so we have to adjust the cash flow. We can either adjust the cash flows of the shorter-term project to match the life of the longer-term project (adjusted NPV), or we can use the equivalent annual annuity (EAA) approach. The answer given is most correct because the project with the highest EAA will have the highest adjusted NPV, and the color laser printer has the highest EAA (and adjusted NPV). (See table below.) The statement, "KGraphix should purchase the webpress because its NPV of $9,939 is greater than the color laser printer's NPV of $7,223," calculates NPV only using the given lives (or unadjusted NPV).
Unadjusted NPV is not the best criterion to use for deciding between mutually exclusive projects with unequal lives. Although the color laser printer has an IRR higher than that of the webpress, IRR is also not the best criterion to use for mutually exclusive projects with unequal lives Quantitatively: (all amounts are in $ unless indicated otherwise):

Notes:1Repeats color laser project beginning in year 3; year 3 cash flow equals the net initial investment cost of $40,000 and $20,000 inflow from the last year of the "first" printer.
Following are examples of how to use financial calculator to solve this problem. (Note, the example is for the unadjusted NPV, IRR, and EAA of the color laser printer. Use a similar methodology to determine the NPV, IRR, and EVA for the other cash flows streams.


Note:1Negative sign is for calculator functionality, not to signify a negative amount

NEW QUESTION: 2
A distributed denial of service attack can BEST be described as:
A. Users attempting to input random or invalid data into fields within a web browser application.
B. Multiple computers attacking a single target in an organized attempt to deplete its resources.
C. Multiple attackers attempting to gain elevated privileges on a target system.
D. Invalid characters being entered into a field in a database application.
Answer: B
Explanation:
A Distributed Denial of Service (DDoS) attack is an attack from several different computers targeting a single computer. One common method of attack involves saturating the target machine with external communications requests, so much so that it cannot respond to legitimate traffic, or responds so slowly as to be rendered essentially unavailable. Such attacks usually lead to a server overload.
A distributed denial-of-service (DDoS) attack occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. Such an attack is often the result of multiple compromised systems (for example a botnet) flooding the targeted system with traffic. When a server is overloaded with connections, new connections can no longer be accepted. The major advantages to an attacker of using a distributed denial-of-service attack are that multiple machines can generate more attack traffic than one machine, multiple attack machines are harder to turn off than one attack machine, and that the behavior of each attack machine can be stealthier, making it harder to track and shut down. These attacker advantages cause challenges for defense mechanisms. For example, merely purchasing more incoming bandwidth than the current volume of the attack might not help, because the attacker might be able to simply add more attack machines. This after all will end up completely crashing a website for periods of time. Malware can carry DDoS attack mechanisms; one of the better-known examples of this was MyDoom. Its DoS mechanism was triggered on a specific date and time. This type of DDoS involved hardcoding the target IP address prior to release of the malware and no further interaction was necessary to launch the attack.

NEW QUESTION: 3
How do you enable a default connection between Database as a Service (DBaaS) instances?
A. by creating nothing for communication between the DBaaS instances because all instances are interconnected by default
B. by creating network groups and adding the instances that you want to communicate to that group
C. by creating dedicated communication keys and setting them to be used only for your DBaaS instance to- instance communication
D. by installing and configuring the NETMGR utility for your DBaaS environment, and then using it to set up the required communication channels
Answer: C
Explanation:
Before your DBaaS database was created, you or a coworker generated a private and public SSH key pair, perhaps using PuTTY Key Generator.
The public key was specified when your database instance was created; a copy of that public key was stored in the VM hosting your database.
When you define in PuTTY an SSH connection to the VM hosting your database, you will specify a copy of the private key stored on your local PC. When you initiate a PuTIY connection, the VM compares the private key to the matching public key stored in the VM. The VM permits the connection when the private and public key match as a valid key pair.
References:
http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/obe_dbaas_connecting_to_an_i nstance/obe_dbaas_connecting_to_an_instance.html

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