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Question 105 - JN0-636 discussion

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which security feature bypasses routing or switching lookup?

A.
transparent mode
Answers
A.
transparent mode
B.
secure wire
Answers
B.
secure wire
C.
mixed mode
Answers
C.
mixed mode
D.
MACsec
Answers
D.
MACsec
Suggested answer: A

Explanation:

The security feature that bypasses routing or switching lookup is transparent mode. The other options are incorrect because:

B) Secure wire is a feature that allows you to connect two interfaces on the same device and forward traffic between them without any processing. Secure wire does not bypass routing or switching lookup, but rather eliminates them altogether1.

C) Mixed mode is a mode of operation for SRX Series devices that allows you to configure both transparent mode and switching mode on the same device. Mixed mode does not bypass routing or switching lookup, but rather uses them depending on the interface type2.

D) MACsec (Media Access Control Security) is a feature that provides encryption and authentication for Layer 2 traffic. MACsec does not bypass routing or switching lookup, but rather operates at a lower layer3.

Therefore, the correct answer is

A) Transparent mode is a mode of operation for SRX Series devices that provides Layer 2 bridging capabilities with full security services. In transparent mode, the SRX Series device acts as a bridge between two network segments and inspects the packets without modifying the source or destination information in the IP packet header. The SRX Series device does not have an IP address in transparent mode, except for the management interface. Transparent mode bypasses routing or switching lookup, because the SRX Series device does not perform any routing or switching functions, but rather forwards the packets based on the MAC addresses4.

Reference:

Secure Wire Overview

Mixed Mode Overview

MACsec Overview

Transparent Mode Overview

asked 18/09/2024
Salah Dabwan
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