A. By default, the security policy can control multicast

B. By default, the security policy only controls unicast packets.

C. By default, the security policy can control unicast packets and broadcast packets

D. By default, the security policy can control unicast packets, broadcast packets, and multicast packets.

A. MAC learning mechanism of the switch

B. ARP learning mechanism

C. Limit on the number of MAC entries

D. The forwarding mechanism of the switch

A. Change notification rules

B. Set up inbound and outbound rules

C. Restore defaults

D. Set up connection security rules

A. Packet marking technology extracts attack source information by logging packets on routers and then using data drilling techniques

B. Packet logging technology through the tracedIPInsert trace data into packets to mark packets on each router mentioned

C. Shallow mail behavior analysis can achieveIPlandAnalysis of information such as address, sending time, sending frequency, number of recipients, shallow email headers, etc.

D. Link detection technology determines the information of the attack source by testing the network connection between routers

A. The standard of fairness refers to the evidentiary material obtained by the legal subject through legal means, which has evidential capacity.

B. The standard of legality is to ensure that the content of electronic evidence remains unchanged from the initial acquisition and collection to the submission and use as litigation evidence.

C. The relevance standard means that if the telephony evidence can have a substantial impact on the facts of the case to a certain extent, the court should rule that it is relevant.

D. The standard of objectivity means that the acquisition, storage, and submission of electronic evidence should be legal, and not constitute a serious violation of basic rights such as national interests, social welfare, and personal privacy.