Which persistence method will always recognize a client when the client returns to the same virtual server?

A, steaming profile will do which of the following?

What is the expected difference between two source address persistence profiles if profile A has a mask of 255.255.255.0 and profile B has a mask of 255.255.0.0?

A BIG-IP has two SNATs, a pool of DNS servers and a virtual server configured to load-balance UDP traffic to the DNS servers. One SNAT's address is 64.100.130.10; this SNAT is defined for all addresses.
The second SNAT's address is 64.100.130.20; this SNAT is
defined for three specific addresses, 172.16.3.54, 172.16.3.55, and 172.16.3.56. The virtual server's destination is
64.100.130.30:53.
The SNATs and virtual server have default VLAN associations. If a client with IP address 172.16.3.55 initiates a request to the virtual server, what is the source IP address of the packet as it reaches the chosen DNS server?

Which tool is used on BIG-IP systems to capture data packets?