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Category: JN0-643

Exam JN0-643: Juniper Networks Certified Internet Professional (JNCIP-ENT)

Why did the IP spoof feature fail to prevent the spoofed packets from being forwarded?

A company’s security policy does not allow outside computers or smart phones into their work areas. All company-provided computers are strictly controlled using 802.1X authentication on all of their switches. All computers obtain DHCP IP addresses from centralized servers and all switches have IP spoofing enabled. However, one of the computers was able to send IP spoofed packets.

Why did the IP spoof feature fail to prevent the spoofed packets from being forwarded?

Which action resolves the Layer 2 loop while maintaining backup connectivity?

Refer to the Exhibit.

In the exhibit, the enterprise is running RSTP on all switches in its network and is currently experiencing Layer 2 loops. The primary link is between switch 1 and switch 2. For redundancy, a secondary Layer 2 link is purchased from the provider. The provider uses Q-in-Q tunneling to transport the enterprise’s Layer 2 frames.

Which action resolves the Layer 2 loop while maintaining backup connectivity?

Based on the configuration, which option prioritizes call-sig traffic over critical traffic?

A network administrator is configuring CoS on a switch and assigns forwarding classes call-sig and critical to the same queue number per the configuration below:

class-of-service {

forwarding-classes {

class best-effort queue-num 0;

class bulk-data queue-num 1;

class critical queue-num 3;

class voice queue-num 6;

class call-sig queue-num 3;

}

}

Based on the configuration, which option prioritizes call-sig traffic over critical traffic?


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