CompTIA Network+ Simulation 4

After recent changes to the pictured network, several users are unable to access the servers. Only PC1, PC2, PC3, and PC4 are configurable. You can only change the adapter configurations to each PC.

Correct Answer:

On PC3, change the subnet mask to 255.255.255.0. When it is set to 255.255.255.128, then the PC with a .129 address will not be on the same subnet as the default gateway which is .1
On PC4, change the default gateway to 10.0.2.1. It has been incorrectly set as 10.1.2.1.

On this simulation, you will be asked to test connectivity after fixing the issues. You MUST ping the other three computers on EACH computer (i.e. from PC1, ping PC2, PC3, PC4, and from PC2, ping PC1, PC3 and PC4, etc)

CompTIA Network+ Simulation 3

After recent changes to the pictured network, several users are unable to access the servers. Only PC1, PC2, PC3, and PC4 are clickable and will give you access to the command prompt and the adapter configuration tabs.

Instructions: Verify the settings by using the command prompt, after making any system changes. Next, restore connectivity by making the appropriate changes to the infrastructure. When you have completed these steps, select the Done button to submit.




Correct Answer:

The default gateway must be on the same network as the nodes that use it. Therefore, the subnet on PC3 and the default gateway on PC4 must be modified.

References:
Dulaney, Emmett and Mike Harwood, CompTIA Network+ Authorized Exam Cram, Fourth Edition, Pearson, Indianapolis, 2012, p 101. http://www.subnetonline.com/pages/subnet-calculators/ip-subnet-calculator.php

CompTIA Network+ Simulation 2

Corporate headquarters provided your office a portion of their class B subnet to use at a new office location. Allocate the minimum number of addresses (using CIDR notation) needed to accommodate each department.

Range Give: 172.30.232.0/24
Sales: 57 devices
HR: 23 devices
IT: 12 devices
Finance: 32 devices
Marketing: 9 devices

After accommodating each department, identify the unused portion of the subnet by responding to the question on the graphic. All drop downs must be filled. Instructions: When the simulation is complete, please select the Done button to submit.

All Networks have the range from /0 to/32

Correct Answer:


Explanation:
An IPv4 address consists of 32 bits. The first x number of bits in the address is the network address and the remaining bits are used for the host addresses. The subnet mask defines how many bits form the network address and from that, we can calculate how many bits are used for the host addresses.

The formula to calculate the number of hosts in a subnet is 2n – 2. The “n” in the host’s formula represents the number of bits used for host addressing. If we apply the formula (22 – 2), we can determine that the following subnets should be configured:

Sales network – /26 – This will provide up to 62 usable IP addresses (64-2 for subnet and broadcast IP) HR network – /27 – This will provide for up to 30 usable IP’s (32-2)
IT – /28 – This will provide for up to 14 usable IP’s (16-2)
Finance – /26 – Note that a /27 is 32 IP addresses but 2 of those are reserved for the network and broadcast IP’s and can’t be used for hosts. Marketing – /28
If we add up how many IP blocks are used that is 64+32+16+64+16=192. A /24 contains 256 IP addresses, so 256-192=64.
So the last unused box should be a /26, which equates to 64 addresses

CompTIA Network+ Simulation 1

You have been tasked with testing a CAT5e cable. A summary of the test results can be found on the screen. Step 1: Select the tool that was used to create the cable test results.
Step 2: Interpret the test results and select the option that explains the results. After you are done with your analysis, click the ‘Submit Cable Test Analysis’ button.

Correct Answer:

CompTIA A+ Core 2 Question J-99

Peter, a technician, is tasked with installing Windows Vista on a new PC that came with Windows XP. He would like to preserve the data on the machine in case it is needed later. Which of the following installation methods would be MOST effective for him to use?

A. Image creation
B. Unattended installation
C. Clean install
D. In-place upgrade

Correct Answer: D

CompTIA A+ Core 2 Question J-98

An administrator has taken steps to secure a SOHO wired network, but as a result the users report that they can no longer access the Internet but can still see other computers on the network. Which of the following would have caused this issue?

A. Port 80 has been disabled
B. Port 3389 has been enabled
C. MAC filtering has been enabled
D. LDAP has been disabled

Correct Answer: A

Explanation:
http://en.wikipedia.org/wiki/TCP_port

CompTIA A+ Core 2 Question J-97

Phishing is:

A. An infection that causes a web browser to go to a different site than the one intended from a search result page.
B. A technique used to obtain financial information from a user mimicking a legitimate website.
C. An infection that causes a computer to behave erratically by playing music and launching browser windows.
D. A technique used to obtain financial information from a user by compiling information from social networks and their friends.

CompTIA A+ Core 2 Question J-96

After installing a new printer the organization determines that there are problems printing images and very large files. Which of the following will MOST likely resolve the issue?

A. Update the drivers using WHQL drivers
B. Install additional memory to each computer
C. Install additional memory to the printer
D. Apply the latest OS service pack

CompTIA A+ Core 2 Question J-94

Which of the following characteristics MOST separates a tablet from a laptop?

A. Lack of field serviceable parts
B. Lack of any storage medium
C. Lack of internal wireless
D. Lack of a touchscreen

Correct Answer: A