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Questions # 51:

The realization of content security filtering technology requires the support of the content security combination license.

Options:
A.

True

B.

False

Expert Solution
Questions # 52:

With regard to APT attacks, the attacker often lurks for a long time and launches a formal attack on the enterprise at the key point of the incident.

Generally, APT attacks can be summarized into four stages:

1. Collecting Information & Intrusion

2. Long-term lurking & mining

3. Data breach

4. Remote control and penetration

Regarding the order of these four stages, which of the following options is correct?

Options:
A.

2-3-4-1

B.

1-2-4-3

C.

1-4-2-3

D.

2-1-4-3

Expert Solution
Questions # 53:

For SYIN Flood attacks, TCP source authentication and TCP proxy can be used for defense. Which of the following descriptions is correct?

Options:
A.

TCP proxy means that the firewall is deployed between the client and the server. When the SYI packet sent by the client to the server passes through the firewall, the

The firewall replaces the server and establishes a three-way handshake with the client. Generally used in scenarios where the back and forth paths of packets are inconsistent.

B.

During the TCP proxy process, the firewall will proxy and respond to each SYN message received, and maintain a semi-connection, so when the SYN message is

When the document flow is heavy, the performance requirements of the firewall are often high.

C.

TCP source authentication has the restriction that the return path must be consistent, so the application of TCP proxy is not common. State "QQ: 9233

D.

TCP source authentication is added to the whitelist after the source authentication of the client is passed, and the SYN packet of this source still needs to be verified in the future.

Expert Solution
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