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Question 87 - JN0-335 discussion

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How does the SSL proxy detect if encryption is being used?

A.
It uses application identity services.
Answers
A.
It uses application identity services.
B.
It verifies the length of the packet
Answers
B.
It verifies the length of the packet
C.
It queries the client device.
Answers
C.
It queries the client device.
D.
It looks at the destination port number.
Answers
D.
It looks at the destination port number.
Suggested answer: D

Explanation:

The SSL proxy can detect if encryption is being used by looking at the destination port number of the packet. If the port number is 443, then the proxy can assume that the packet is being sent over an encrypted connection. If the port number is different, then the proxy can assume that the packet is not encrypted. For more information, please refer to the Juniper Networks JNCIS-SEC Study Guide.

The SSL proxy is a security feature that provides visibility and control over SSL/TLS encrypted traffic. When SSL proxy is enabled, it intercepts SSL/TLS traffic and decrypts it to allow visibility into the content of the encrypted traffic. However, before decrypting the traffic, the SSL proxy must first determine if the traffic is encrypted.

To detect if encryption is being used, the SSL proxy looks at the destination port number. If the destination port number is a known SSL/TLS port (e.g., TCP port 443), the SSL proxy assumes that encryption is being used and intercepts the traffic. If the destination port is not a known SSL/TLS port, the SSL proxy does not intercept the traffic and allows it to pass through the device unmodified.

asked 18/09/2024
Newton Vela
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