A network engineer is configuring a Juniper QFX switch for RoCEv2. The engineer needs to ensure that RoCE traffic is properly classified and marked. Which configuration elements are required to achieve this?

A firewall filter to match RoCE traffic and a policer to rate-limit it.

A scheduler to set the transmit-rate and a drop-profile to manage congestion.

A forwarding class and a scheduler, but no classifier or rewrite rule is needed if the traffic is already marked.

A classifier to map DSCP values to forwarding classes, and a rewrite rule to set the DSCP value on egress.

What is the primary purpose of Remote Direct Memory Access (RDMA) in a data center network?

To replace the need for TCP/IP in all data center communications

To increase the bandwidth of a single network link by aggregating multiple physical connections

To provide encryption for data in transit between servers in a data center

To enable direct memory-to-memory data transfers between servers without involving the CPU of the receiving host

What is the primary purpose of Priority Flow Control (PFC) in a network carrying RoCE traffic?

To drop packets randomly to avoid congestion

To provide lossless behavior for a specific priority class by pausing traffic on that class when congestion occurs

To mark packets with ECN bits to signal congestion to the receiver

To prioritize routing decisions based on the DSCP value

How does Explicit Congestion Notification (ECN) help improve RoCE performance?

By pausing the entire link when congestion is detected

By increasing the buffer size on switches to accommodate bursts

By dropping packets with a specific DSCP value to protect higher-priority traffic

By marking packets with a Congestion Experienced (CE) bit, allowing the sender to reduce its transmission rate before packet loss occurs

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 2Objective 4

Class of Service (RDMA/RoCE) JN0-683 Practice Questions (Page 1)

Part of the Layer 3 Fabrics domain, which makes up ~23% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–2 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

7concepts

Questions 1–5

1application · medium
A network engineer is configuring a Juniper QFX switch for RoCEv2. The engineer needs to ensure that RoCE traffic is properly classified and marked. Which configuration elements are required to achieve this?
Select an answer first
2foundation · easy
Which Junos operational command displays CoS queue statistics, including packet counts and drop counts, for an interface?
Select an answer first
3foundation · easy
What is the primary purpose of Remote Direct Memory Access (RDMA) in a data center network?
Select an answer first
4foundation · easy
What is the primary purpose of Priority Flow Control (PFC) in a network carrying RoCE traffic?
Select an answer first
5foundation · easy
How does Explicit Congestion Notification (ECN) help improve RoCE performance?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to JN0-683

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Juniper Networks. “JN0-683” is a trademark of its owner, used for identification only.