CCSE 156-315.81 Book

The default port used by the AMON server when using CPSTAT is 18192. CPSTAT is a command-line tool that allows administrators to monitor various statistics and status information about Check Point products and components, such as CPU usage, memory usage, policy installation, cluster state, etc. CPSTAT uses AMON (Advanced Monitoring) protocol to communicate with AMON server, which is a daemon that runs on Security Gateways or Management Servers and collects and provides AMON data. By default, AMON server listens on TCP port 18192 for incoming CPSTAT requests.

The essential means by which state synchronization works to provide failover in the event an active member goes down, ccp is used specifically for clustered environments to allow gateways to report their own state and learn about the states of other members in the cluster. Ccp stands for Cluster Control Protocol, and it is a proprietary protocol that runs on UDP port 8116. Ccp is responsible for exchanging state information, health checks, load balancing decisions, and synchronization network configuration between cluster members. The other options are either commands or daemons that are related to cluster operations, but not the protocol itself. 

According to the Check Point website, you can use the pre_upgrade_verifier tool to verify if your management server is ready to upgrade to R81.20. This tool checks the compatibility of your current configuration and database with the target version, and provides a detailed report of any issues or warnings. The other tools are either used for exporting or importing databases, or not valid tools. References: Upgrade Verification Service

According to the Check Point website, GAiA Software update packages can be imported and installed offline in situation where the Security Gateway with GAiA does not have access to Internet. This allows you to manually download the packages from another device and transfer them to the Security Gateway using a USB drive or other media. The other situations are either not relevant or not possible. References: Offline Software Updates