Tag: networking

To answer this question, we need to understand the concept of subnet masks and classful addressing.

In classful addressing, IP addresses are divided into three main classes: Class A, Class B, and Class C. Each class has a default subnet mask associated with it.

Class C addresses are used for small networks, as they provide a larger number of host addresses compared to Class A and Class B addresses. The default subnet mask for a Class C address is 255.255.255.0.

Let's go through each option to understand why it is correct or incorrect:

Option A) 255.0.0.0 - This option is incorrect because it represents the default subnet mask for a Class A address, not a Class C address.

Option B) 255.255.0.0 - This option is incorrect because it represents the default subnet mask for a Class B address, not a Class C address.

Option C) 255.255.255.0 - This option is correct because it represents the default subnet mask for a Class C address.

Option D) 255.255.255.255 - This option is incorrect because it represents a subnet mask with all bits set to 1, which is not a valid subnet mask for any class of IP address.

The correct answer is C) 255.255.255.0. This option is correct because it represents the default subnet mask for a Class C address.

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To answer this question, you need to understand the concept of polling.

Option A) Simplex - This option is incorrect because simplex refers to a system that allows data to flow in only one direction, such as a simplex communication channel.

Option B) Base - This option is incorrect because base does not provide any information about whether the system has restarted, been reconfigured, or is out of service.

Option C) Polling - This option is correct. Polling is a method used by systems to check the status or availability of devices or resources. In this context, polling can be used to determine whether the system has restarted, been reconfigured, or is out of service.

Option D) Proxy - This option is incorrect because a proxy is an intermediary server that acts as a gateway between clients and other servers. It does not provide information about system restarts, reconfigurations, or outages.

The correct answer is C) Polling. This option is correct because polling is the method used to determine whether the system has restarted, been reconfigured, or is out of service.

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To track physical disk activity, you would use the command "diskperf -y". Let's go through each option to understand why it is correct or incorrect:

Option A) pdisk /y - This option is incorrect because there is no command called "pdisk" for tracking physical disk activity.

Option B) disk /y - This option is incorrect because the "disk" command does not have a "/y" option for tracking physical disk activity.

Option C) disk /active? - This option is incorrect because the "disk" command does not have an "/active?" option for tracking physical disk activity.

Option D) diskperf -y - This option is correct because the "diskperf" command with the "-y" option enables disk performance counters, allowing you to track physical disk activity.

The correct answer is D) diskperf -y. This option is correct because it enables disk performance counters, which are used to track physical disk activity.

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To determine the class of an IP address, we need to look at the first few bits of the address.

In this case, the first octet (8 bits) of the IP address is "10011010".

By looking at the range of values for each class, we can determine the class based on the value of the first octet:

Class A: 0.0.0.0 to 127.255.255.255 Class B: 128.0.0.0 to 191.255.255.255 Class C: 192.0.0.0 to 223.255.255.255 Class D: 224.0.0.0 to 239.255.255.255 Class E: 240.0.0.0 to 255.255.255.255 (reserved for experimental use)

In this case, the value of the first octet is 154, which falls within the range for Class C (192.0.0.0 to 223.255.255.255).

Therefore, the class of the given IP address is Class C.

The correct answer is C.

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• Wrong explanation