Your company has a remote office that contains 1,600 client computers on a single subnet. You
need to select a subnet mask for the network that wil support all of the client computers. The
solution must minimize the number of unused addresses.
Which subnet mask should you select?
Case Study 1 - Proseware, Inc
Overview General Overview
Proseware, Inc. is a pharmaceutical services company that has a sales department, a marketing
department, an operations department, and a human resources department.
Proseware has two main offices. One of the offices is located in New York. The other office is
located in Chicago. The New York office uses a 172.16.1.0/24 network ID. The Chicago office
uses a 192.168.1.0/24 network ID.
The offices connect to each other by using a high-bandwidth, low-latency WAN link. Each office
connects directly to the Internet.
The network contains an Active Directory forest named proseware.com. The forest contains two
domains named proseware.com and chicago.proseware.com. Al of the user accounts and the
computer accounts in the New York office reside in the proseware.com domain. Al of the user
accounts and the computer accounts in the Chicago office reside in the chicago.proseware.com
domain. Al DNS zones are Active-Directory-integrated.
Each office is configured as an Active Directory site. The network ID for each office is
associated to the appropriate site.
Each office contains two domain controllers. The domain controllers were recently upgraded
from Windows Server 2008 R2 to Windows Server 2012 R2.
The functional level of the domain and the forest is Windows Server 2003.
The company uses Active Directory user attributes to store the personal information of its
employees in custom attributes.
The relevant servers are configured as shown in the following table.