What is a key difference between RoCEv1 and RoCEv2 regarding network layer support?

RoCEv1 uses TCP for reliable delivery, while RoCEv2 uses UDP for faster transmission

RoCEv1 supports IP routing, while RoCEv2 does not

RoCEv1 is encapsulated in UDP, while RoCEv2 is encapsulated directly in Ethernet

RoCEv1 operates only within a Layer 2 domain, while RoCEv2 can be routed across Layer 3 networks

Which data center workload is most likely to benefit from the low-latency, high-throughput characteristics of RDMA?

Email services that store messages on a central server

Web server farms serving static content to end users

Distributed storage systems that replicate data between nodes

DNS resolution services that handle high query rates

In Junos CoS, what is the role of a classifier when supporting RoCE traffic?

To assign an internal forwarding class and loss priority to incoming packets based on their headers

To rewrite the DSCP or 802.1p bits on outgoing packets

To schedule packets into different queues based on their size

To drop packets that exceed a configured rate

A company is deploying a high-performance computing (HPC) cluster that uses MPI (Message Passing Interface) for parallel workloads. The network team is considering using RoCE to reduce latency and CPU overhead. Which benefit of RoCE is most relevant to this HPC workload?

RoCE uses IP routing, allowing MPI traffic to traverse Layer 3 networks, which is required for large HPC clusters.

RoCE provides built-in encryption, securing MPI traffic between compute nodes.

RoCE provides lossless delivery, which is required for MPI traffic to avoid retransmissions.

RoCE reduces CPU overhead by offloading network processing to the NIC, freeing CPU cycles for compute tasks.

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 2Objective 4

Class of Service (RDMA/RoCE) JN0-683 Practice Questions (Page 4)

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 16–20

16foundation · easy
What is a key difference between RoCEv1 and RoCEv2 regarding network layer support?
Select an answer first
17foundation · easy
Which data center workload is most likely to benefit from the low-latency, high-throughput characteristics of RDMA?
Select an answer first
18foundation · easy
In Junos, which CoS component is used to configure ECN marking on a queue?
Select an answer first
19foundation · easy
In Junos CoS, what is the role of a classifier when supporting RoCE traffic?
Select an answer first
20application · medium
A company is deploying a high-performance computing (HPC) cluster that uses MPI (Message Passing Interface) for parallel workloads. The network team is considering using RoCE to reduce latency and CPU overhead. Which benefit of RoCE is most relevant to this HPC workload?
Select an answer first

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