Explanation
Configuring Interfaces
Configure the Security Gateway 80 interfaces in the Interfaces tab in the Security Gateway window.
To configure the interfaces:
* From the Devices window, double-click the Security Gateway 80.
The Security Gateway window opens.
* Select the Interfaces tab.
* Select Use the following settings. The interface settings open.
* Select the interface and click Edit.
The Edit window opens.
* From the IP Assignment section, configure the IP address of the interface:
* Select Static IP.
* Enter the IP address and subnet mask for the interface.
* In Security Zone, select Wireless . Security zone is a type of zone, created by a bridge to easily create segments, while maintaining IP addresses and router configurations. Security zones let you choose if to enable or not the firewall between segments.

There is a lock on top left side of the screen. B is the logical answer.

Using Endpoint Identity Agents give you:
* User and machine identity
* Minimal user intervention - all necessary configuration is done by administrators and does not require user input.
* Seamless connectivity - transparent authentication using Kerberos Single Sign-On (SSO) when users are logged in to the domain. If you do not want to use SSO, users enter their credentials manually. You can let them save these credentials.
* Connectivity through roaming - users stay automatically identified when they move between networks, as the client detects the movement and reconnects.
Reference: https://www.checkpoint.com/products/identity-awareness-software-blade/

Explanation/Reference:
Explanation:
R80 can be installed only on GAIA OS.
Supported Check Point Installations All R80 servers are supported on the Gaia Operating System:
* Security Management Server
* Multi-Domain Security Management Server
* Log Server
* Multi-Domain Log Server
* SmartEvent Server
Reference: http://dl3.checkpoint.com/paid/1f/1f7e21da67aa992954aa12a0a84e53a8/ CP_R80_ReleaseNotes.pdf?HashKey=1479838085_d6ffcb36c6a3128708b3f6d7bcc4f94e&xtn=.pdf