Your company has a main office that contains 225 client computers. The client computers are located on a subnet that uses the network ID of 10.10.1.0/24.
The company plans to open two branch offices. The offices will be configured as shown in the following table.

You need to select a network prefix for each office to ensure that there are enough IPv4 addresses for each client computer.
The solution must minimize the number of unused IP addresses.
Which network prefixes should you select?
To answer, drag the appropriate network prefix to the correct branch office in the answer area.

You have a server named Server1. Server1 runs Windows Server 2012 R2 and is located in a perimeter network.
You need to configure a custom connection security rule on Server1. The rule must encrypt network communications across the Internet to a computer at another company.
Which authentication method should you configure in the connection security rule?（）