DRAG DROP
You are configuring a test network. The test network contains a subnet named LAN1.LAN1
uses the network ID of 10.10.1.0/27.
You plan to add a new subnet named LAN2 to the test network.
LAN1 and LAN2 will be c onnected by a router.
You need to identify a valid network ID for LAN2 that meets the following requirements:
+ Ensures that hosts on LAN2 can communicate with hosts on LAN1.
+ Supports at least 100 IPv4 hosts.
+ Uses only private IP addresses.
Which network ID should you use?
To answer, drag the appropriate network ID and subnet mask to the correct location in the answer area.
Answer: 
Explanation:
The Subnet Mask specifies which bits of the IP address identify the host system and which
bits identify the network where the host system resides.References:
Exam Ref: 70-410: Installing and Configuring Windows Server 2012 R2, Chapter4:
Deploying and configuring core network services, Objective 4.1: Configure IPv4 and IPv6
addressing, p.192, 196
That explanation isn’t very explanatory. Can someone please expand on this? I understand how the subnet mask operates in terms of network bits vs host bits and how to calculate the # of hosts and subnets when given a specific subnet address, etc, but I don’t understand how this answer was arrived at.
10.10.1.0 /27 means it doesn’t use the full range (/24 is 256 addresses, /25 128, /26 is 64, .27 is 32 addresses).
You need 100 addresses. which is a /25 netwerk (128 addresses). Which can either start with x.x.x.0 or x.x.x.128. As you already use 10.10.1.0 to 31, you need to start at 10.10.1.128/25 and /25 translate to 255.255.255.128.
yes exactly how i worked it out
Agreed to Robber…..
THANK YOU VERY MUCH FOR THE ANSWER!