Last Usable IP Address in Engineering Subnet - N10-007 Exam
Question
A technician is allocating the IP address space needed for a new remote office.
This office will contain the engineering staff with six employees and the digital marketing staff with 55 employees.
The technician has decided to allocate the 192.168.1.0/24 block to the remote office.
The engineering staff has been allocated the 192.168.1.64/29 subnet.
Using the LEAST amount of space possible, which of the following would be the last usable IP address in the engineering subnet?
A.
192.168.1.62 B.
192.168.1.63 C.
192.168.1.70 D.
192.168.1.71
C.
Explanations
A technician is allocating the IP address space needed for a new remote office.
This office will contain the engineering staff with six employees and the digital marketing staff with 55 employees.
The technician has decided to allocate the 192.168.1.0/24 block to the remote office.
The engineering staff has been allocated the 192.168.1.64/29 subnet.
Using the LEAST amount of space possible, which of the following would be the last usable IP address in the engineering subnet?
A.
192.168.1.62
B.
192.168.1.63
C.
192.168.1.70
D.
192.168.1.71
C.
In this scenario, the technician has decided to allocate the 192.168.1.0/24 block to the remote office, which means that the IP address range for this office will be from 192.168.1.0 to 192.168.1.255.
The engineering staff has been allocated the 192.168.1.64/29 subnet. This means that the engineering staff will have access to the IP addresses from 192.168.1.64 to 192.168.1.71, with a subnet mask of 255.255.255.248.
The "least amount of space possible" for the engineering staff would be a subnet with 6 usable IP addresses, which is represented by the subnet mask 255.255.255.248. This is also known as a /29 subnet, which has a block size of 8.
To find the last usable IP address in the engineering subnet, we need to determine the broadcast address for the subnet. The broadcast address is the highest IP address in the subnet, and it is used to send data to all devices on the network. To calculate the broadcast address, we need to perform the following steps:
Convert the subnet mask to binary: 255.255.255.248 = 11111111.11111111.11111111.11111000
Determine the block size: The block size for a /29 subnet is 8.
Determine the subnet number: The subnet number is the first IP address in the subnet. In this case, it is 192.168.1.64.
Determine the broadcast address: To calculate the broadcast address, we need to add the block size to the subnet number and subtract 1. 192.168.1.64 + 8 - 1 = 192.168.1.71
Therefore, the last usable IP address in the engineering subnet is 192.168.1.70, which is option C.
