A service provider is deploying a new edge router. They want to ensure that voice traffic (RTP) is mapped to the expedited-forwarding class, while all other traffic remains in the default best-effort class. The voice traffic is marked with DSCP EF (46) in the IP header. However, they also have some legacy voice equipment that marks voice traffic with DSCP AF41 (34). They want to ensure that both types of voice traffic are classified as expedited-forwarding. Which configuration should they use?

Enable default classification, which will automatically place both DSCP 46 and DSCP 34 in the EF class.

Apply a multifield classifier that matches the source IP of the voice equipment and assigns the EF class.

Apply a BA classifier that maps DSCP 46 and DSCP 34 to the EF forwarding class.

Use a rewrite rule to change DSCP 34 to DSCP 46 on ingress.

A customer's traffic arrives at your router with inconsistent DSCP markings. You need to classify their traffic into the premium forwarding class based on source IP address and destination port 443, regardless of the DSCP value. Which approach should you use?

Enable default classification, which will automatically place all HTTPS traffic in the premium class.

Configure a BA classifier that matches DSCP values and assigns them to the premium class.

Apply a multifield classifier that matches source IP and destination port 443 and assigns the premium forwarding class.

Use a rewrite rule to set the DSCP value to premium on all packets from that source.

What is the defining characteristic of behavior aggregate (BA) classification in Junos CoS?

It uses a single field in the packet header to classify traffic

It requires a firewall filter to be applied to the interface

It is only supported on MPLS labels, not on IP packets

It examines multiple fields in the packet header to make a classification decision

Juniper NetworksCertified Professional, Service Provider Routing and Switching (JNCIP-SP)

Domain 4Objective 2

Forwarding Classes and Classification JN0-664 Practice Questions (Page 1)

Part of the Class of Service (CoS) domain, which makes up ~16% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 1–1 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

6concepts

Questions 1–5

1expert · hard
A service provider is deploying a new edge router. They want to ensure that voice traffic (RTP) is mapped to the expedited-forwarding class, while all other traffic remains in the default best-effort class. The voice traffic is marked with DSCP EF (46) in the IP header. However, they also have some legacy voice equipment that marks voice traffic with DSCP AF41 (34). They want to ensure that both types of voice traffic are classified as expedited-forwarding. Which configuration should they use?
Select an answer first
2application · easy
You are troubleshooting a CoS issue on a Junos router. You notice that IPv4 packets with DSCP 46 are being placed in the expedited-forwarding class. You want to verify that this is the default behavior. What is the default forwarding class for DSCP 46?
Select an answer first
3application · medium
A customer's traffic arrives at your router with inconsistent DSCP markings. You need to classify their traffic into the premium forwarding class based on source IP address and destination port 443, regardless of the DSCP value. Which approach should you use?
Select an answer first
4foundation · easy
What is the defining characteristic of behavior aggregate (BA) classification in Junos CoS?
Select an answer first
5application · easy
You are configuring CoS on a Junos router. You want to classify incoming Ethernet traffic based on the 802.1p priority bits in the VLAN header. Which BA classifier type should you use?
Select an answer first

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Forwarding Classes and Classification JN0-664 Practice Questions (Page 1)

Questions 1–5

You are troubleshooting a CoS issue on a Junos router. You notice that IPv4 packets with DSCP 46 are being placed in the expedited-forwarding class. You want to verify that this is the default behavior. What is the default forwarding class for DSCP 46?

A customer's traffic arrives at your router with inconsistent DSCP markings. You need to classify their traffic into the premium forwarding class based on source IP address and destination port 443, regardless of the DSCP value. Which approach should you use?

What is the defining characteristic of behavior aggregate (BA) classification in Junos CoS?

You are configuring CoS on a Junos router. You want to classify incoming Ethernet traffic based on the 802.1p priority bits in the VLAN header. Which BA classifier type should you use?

Keep studying — Class of Service (CoS)