CompTIA Network+ Question A-23

Peter, a network technician, is setting up a DHCP server on a LAN segment. Which of the following options should Peter configure in the DHCP scope, in order to allow hosts on that LAN segment using dynamic IP addresses, to be able to access the Internet and internal company servers? (Select THREE).

A. Default gateway
B. Subnet mask
C. Reservations
D. TFTP server
E. Lease expiration time of 1 day
F. DNS servers
G. Bootp

Correct Answer: ABF

Explanation:
The question states that the client computers need to access the Internet as well as internal company servers. To access the Internet, the client computers need to be configured with an IP address with a subnet mask (answer B) and the address of the router that connects the company network to the Internet. This is known as the ‘default gateway’ (answer A).
To be able to resolve web page URLs to web server IP addresses, the client computers need to be configured with the address of a DNS server (answer F).

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 A+ Core 2 Question G-38

A critical server was replaced by the IT staff the previous night. The following morning, some users are reporting that they are unable to browse to the Internet upon booting their workstations. Users who did not shut down their workstations the previous day are able to connect to the Internet. A technician looks at the following report from a workstation with no Internet connectivity: IP Address: 192.168.1.101 Netmask: 255.255.255.0 DHCP Server: 192.168.1.1DNS Server: 192.168.1.2 Default Gateway: 192.168.1.1 Given the above report, which of the following is the cause of why some workstations are unable to browse the Internet?

A. The workstation has an APIPA address.
B. The DHCP server is unavailable.
C. The default gateway router is misconfigured.
D. The DHCP server is misconfigured.

CompTIA A+ Question L-41

Which of the following can be used as the default gateway for the 192.168.1.0/24 network?

A. 192.168.0.1
B. 192.168.0.255
C. 192.168.1.0
D. 192.168.1.10

Correct Answer: D

CompTIA A+ Question I-72

Which of the following is another description of a default gateway?

A. The DNS server
B. The inverse subnet mask
C. The route of last resort
D. The subnet network address

Correct Answer: C

CompTIA A+ Question G-33

A computer technician is installing a new wireless router for a small office. The office already has an internal device that assigns addresses to users. Which of the following functions needs to be disabled on the router to prevent conflicts?

A. DMZ capability
B. MAC filtering capability
C. Network Address Translation
D. DHCP server functionality

Correct Answer: D

Explanation:
DHCP automatically assigns IP address, subnet mask and default gateway to provide access to workstations. Disable DHCP server before installing a wireless router so that you can configure it without DHCP assigning IP addresses to other computers.