GB0-391-ENU Exam Preparation Material | Constructing Secure optimized WANs v2.0

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Prepare for the GB0-391-ENU Constructing Secure optimized WANs v2.0 exam with CertQueen's independently developed study resources. Review important concepts, practice scenario-based questions, and use clear explanations to identify areas that require further study.

Question#1

Which of the following standards is a purely subjective measure of speech quality?

A. MOS
B. RESEARCH
C. PQSM
D. PSQM

Question#2

The Best-Effort model has which of the following characteristics? (Multiple choice)

A. Simple to implement. Save processing resources and process quickly
B. Implemented through queues
C. Treat different types of business differently
D. The bandwidth, delay, jitter and packet loss of data flows are controllable.

Question#3

Which of the following descriptions of GRE VPN and BGP/MPLS VPN are correct?

A. Both address spaces can be separated.
B. They are all point-to-point tunnels
C. GRE VPN can separate address spaces, but BGP/MPLS VPN cannot separate address spaces.
D. GRE VPN cannot separate address spaces, but BGP/MPLS VPN can separate address spaces.

Question#4

Configure the following commands on the MSR router:
qos pql 1 protocol-ip-tcp1000 queue-top
qos pql 1 protocol-ip-tcp1001 queue-middle
qos pql 1 protocol-ip-tcp1002 queue- normal
qos pql 1 protocol-ip-tcp1003 queue-bottom
#
interface GigabitEthernet0/1
port link-mode route
ip address 192.168.1.1 255.255.255.0
qos lr outbound cir 10000 cbs 625000 ebs 0
qos pq pql 1
qos rtpq start-port 16384 end-port 32767 bandwidth 1000 cbs 25000
Then when the TCP packets with destination ports 1000, 1001, 1002 and 1003 respectively and the traffic matching RTPQ enter the MSR at a speed of 4Mbps and are forwarded from port G0/1, Which of the following statement is correct? (Multiple choice)

A. The forwarding rate of TCP packets with destination port 1000 is 3Mbps
B. The forwarding rate of TCP packets with destination port 1001 is 4Mbps
C. The forwarding rate of TCP packets with destination port 1002 is 2.4Mbps
D. The forwarding rate of TCP packets with destination port 1003 is 0
E. RTPQ traffic packet forwarding rate is approximately 1Mbps

Question#5

Compared with ordinary data flows, voice flows are more sensitive to delay and jitter. In order to ensure that voice data is forwarded with priority, the following queue scheduling technology can be used ____

A. PQ

Exam Code: GB0-391-ENU
Q & A: 420 Q&As         Updated:  Oct 17,2026

 

 Access Complete GB0-391-ENU Preparation Material

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Exam Code: GB0-391-ENU
Q & A: 420 Q&As
Updated:  Oct 17,2026

 

 Access Complete GB0-391-ENU Preparation Material