Valid IP Address for DMZ Network
Question
A technician has finished installing the operating system on a new server and needs to provide IP addressing information.
The server will be connected to the DMZ network.
Devices on the network use a default gateway address of 192.168.55.1
Which of the following is a valid IP address for a server in the DMZ network?
Answers
Explanations
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A. B. C. D.B.
The answer is option C: IP: 192.168.55.155, NETMASK 255.255.255.128.
Explanation:
The question states that the server will be connected to the DMZ network, and devices on the network use a default gateway address of 192.168.55.1. This means that the server must be assigned an IP address that is within the same network as the other devices and uses the same default gateway address.
To determine a valid IP address for the server, we need to look at the subnet mask. The subnet mask is used to divide an IP address into a network portion and a host portion. In this case, the subnet mask is 255.255.255.128, which means that the first 25 bits of the IP address are used to identify the network, and the remaining 7 bits are used to identify the host.
Using this information, we can see that the valid range of IP addresses for this network is from 192.168.55.1 to 192.168.55.126 (the first and last addresses are reserved for network and broadcast addresses, respectively). Therefore, any IP address within this range can be used for the server, as long as it is not already in use by another device.
Option A: IP: 192.168.55.1, NETMASK 255.255.255.0 This IP address is not valid for the DMZ network because it uses a different subnet mask (255.255.255.0) than the other devices on the network (255.255.255.128). This would result in the server being on a different network than the other devices and not being able to communicate with them.
Option B: IP: 192.168.55.5, NETMASK 255.255.255.128 This IP address is within the valid range for the network, but it is close to the default gateway address (192.168.55.1). It is generally recommended to avoid using IP addresses that are close to the default gateway, as it can cause routing issues.
Option C: IP: 192.168.55.155, NETMASK 255.255.255.128 This IP address is also within the valid range for the network, and it is far enough from the default gateway address to avoid any potential routing issues. Therefore, this is a valid IP address for the server.
Option D: IP: 192.168.55.255, NETMASK 255.255.255.0 This IP address is not valid for the DMZ network for the same reason as option A - it uses a different subnet mask than the other devices on the network. Additionally, it is the broadcast address for the network 192.168.55.0/24, so it cannot be assigned to a host.
