5.2 Maintaining and Troubleshooting Connectivity Issues. Considerations Include: PROFESSIONAL-CLOUD-NETWORK-ENGINEER Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A BGP session between your on-premises router and a Cloud Router is down. The Cloud Router logs show 'BGP session establishment failed'. You have verified that the IP addresses and AS numbers are correct. What should you check next?

   • AThe Cloud Router's BGP route policy.
   • BThe VPC Flow Logs for the BGP traffic.
   • CThe firewall rules on the VPC that allow TCP port 179 from the on-premises peer IP.
   • DThe route advertisements from the Cloud Router to the on-premises router.
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   You are troubleshooting a complex application issue where traffic between two VMs in the same VPC is not behaving as expected. You need to capture the actual packets exchanged between the two VMs to analyze the application protocol. What should you use?

   • APacket Mirroring to mirror traffic from one VM to a collector VM.
   • BVPC Flow Logs to see the packet headers.
   • CFirewall logs to see if the traffic is allowed.
   • DCloud NAT logs to see the translated addresses.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   A VM cannot reach the internet. Firewall logs show that traffic is being denied. What is the most likely cause?

   • ABGP misconfiguration
   • BA firewall rule is blocking the traffic
   • CIncorrect DNS settings
   • DInsufficient bandwidth
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   A Cloud Interconnect link is down. Which of the following is a common cause of link failure?

   • ADNS misconfiguration for the on-premises domain
   • BBGP misconfiguration on the on-premises router
   • CPhysical fiber cut or equipment failure at the colocation facility
   • DIncorrect firewall rules in the VPC
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   Which Application Load Balancer feature allows you to gradually shift traffic from an old version of an application to a new version by adjusting the proportion of requests sent to each target group?

   • AWeighted target groups
   • BSticky sessions
   • CConnection draining
   • DHealth checks
   Reveal Solution Discussion Select an answer first