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JN0-102 · Question #390

Which statement is correct regarding exception traffic on Junos devices?

The correct answer is D. The Junos OS has a built-in rate limiter for exception traffic.. Junos OS includes a built-in rate limiter for exception traffic destined for the Routing Engine (RE) to protect it from being overwhelmed by unexpected or malicious traffic. This ensures the RE's stability and operational integrity.

Junos OS Fundamentals

Question

Which statement is correct regarding exception traffic on Junos devices?

Options

  • AThe Junos OS does not provide congestion control for exception traffic sent to the RE.
  • BThe built-in rate limiter for exception traffic is configurable.
  • CAll exception traffic destined for the RE is sent over the out-of-band management link.
  • DThe Junos OS has a built-in rate limiter for exception traffic.

How the community answered

(59 responses)
  • B
    2% (1)
  • C
    5% (3)
  • D
    93% (55)

Why each option

Junos OS includes a built-in rate limiter for exception traffic destined for the Routing Engine (RE) to protect it from being overwhelmed by unexpected or malicious traffic. This ensures the RE's stability and operational integrity.

AThe Junos OS does not provide congestion control for exception traffic sent to the RE.

Junos OS *does* provide congestion control (via the built-in rate limiter) for exception traffic to the RE to prevent it from being overwhelmed.

BThe built-in rate limiter for exception traffic is configurable.

The built-in rate limiter for exception traffic to the RE is generally not configurable by the user; it's a fixed protection mechanism.

CAll exception traffic destined for the RE is sent over the out-of-band management link.

Not all exception traffic is sent over an out-of-band management link; it typically traverses the in-band data plane and is diverted to the RE.

DThe Junos OS has a built-in rate limiter for exception traffic.Correct

The Junos OS has a built-in rate limiter for exception traffic, which is traffic that requires processing by the Routing Engine (RE) rather than being forwarded directly by the Packet Forwarding Engine (PFE). This rate limiter protects the RE from being overloaded.

Concept tested: Junos OS exception traffic rate limiting

Source: https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/topic-map/security-system-exception-traffic.html

Topics

#Junos architecture#exception traffic#rate limiter#RE (Routing Engine)

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