By default, the interval for sending BGP Keepalive packets is () s. (using Arabic numerals)

IPv6 link-local addresses can be generated through stateless automatic configuration.

Option 82 in the DHCP message is called the relay agent information option, from which the administrator can obtain a lot of information about the client. Option 82 can contain at most () Sub-Options.

Regarding the description of VRRP load sharing, which one is correct? (Multiple choice)

Which of the following LSAs only spread in a single area? (Multiple choice)