Examine the following CLI configuration:
config system session-ttl
set default 1800
end
What statement is true about the effect of the above configuration line?
A. Sessions can be idle for more than 1800 seconds.
B. The maximum length of time a session can be open is 1800 seconds.
C. After 1800 seconds, the end user must re-authenticate.
D. After a session has been open for 1800 seconds, the FortiGate sends a keepalive packet to both client and server.
B