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Google Professional-Cloud-Network-Engineer Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Configuring managed network services16%- Load balancing
  • 1. Internal/external, regional/global types
  • 2. Backend services, NEGs, health checks
- Cloud CDN
  • 1. Caching rules, origin configuration
- Cloud DNS
  • 1. DNSSEC, logging
  • 2. Public/private zones, forwarding, peering
- Cloud NAT
  • 1. Address allocation, port management
Topic 2: Configuring hybrid and multi-cloud connectivity14%- Cloud VPN
  • 1. Site-to-site, HA VPN, policy-based/route-based
- Cloud Router
  • 1. BGP configuration, route advertisement
- Cloud Interconnect
  • 1. Dedicated, Partner Interconnect, VLAN attachments
Topic 3: Configuring cloud network security solutions12%- Secure Web Proxy
  • 1. URL filtering, access control
- Cloud Armor
  • 1. Security policies, WAF rules, DDoS protection
- VPC Service Controls
  • 1. Service perimeters, access levels
Topic 4: Implementing a VPC network20%- Network Connectivity Center
  • 1. Spoke and hub configuration
- Hierarchical firewalls and security policies
  • 1. Cloud Next Generation Firewall
- Configuring VPC resources
  • 1. Networks, subnets, firewall rules/policies
  • 2. Private Google Access, service accounts
- VPC connectivity
  • 1. VPC Peering, Shared VPC setup
  • 2. Dynamic and static routing
Topic 5: Managing, monitoring, and troubleshooting network operations12%- Monitoring and logging
  • 1. VPC Flow Logs, Firewall Insights
  • 2. Cloud Logging, Cloud Monitoring
  • 3. Network Intelligence Center
- Troubleshooting connectivity
  • 1. Load balancer and packet loss diagnosis
  • 2. VPN/Interconnect issues, BGP errors
Topic 6: Designing and planning a Google Cloud VPC network26%- Designing for GKE networking
  • 1. Alias IP ranges, private control plane
- Designing VPC networks
  • 1. Standalone vs Shared VPC
  • 2. Subnet design and CIDR planning
  • 3. IP address management
  • 4. Private Service Access / Private Service Connect
- Designing overall network architecture
  • 1. Network tiers (Premium/Standard)
  • 2. DNS topology design
  • 3. High availability, disaster recovery, scalability
- Designing hybrid and multi-cloud networks
  • 1. Cloud Interconnect / Cloud VPN architecture
  • 2. Cloud Router and BGP design

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q283-Q288):

NEW QUESTION # 283
You want to set up two Cloud Routers so that one has an active Border Gateway Protocol (BGP) session, and the other one acts as a standby.
Which BGP attribute should you use on your on-premises router?

Answer: D

Explanation:
https://cloud.google.com/router/docs/concepts/overview


NEW QUESTION # 284
You need to define an address plan for a future new GKE cluster in your VPC. This will be a VPC native cluster, and the default Pod IP range allocation will be used. You must pre-provision all the needed VPC subnets and their respective IP address ranges before cluster creation. The cluster will initially have a single node, but it will be scaled to a maximum of three nodes if necessary.
You want to allocate the minimum number of Pod IP addresses.
Which subnet mask should you use for the Pod IP address range?

Answer: A

Explanation:
/24 is the default CIDR block assigned to each worker node, with maximum 110 PODs for node.
For 3 node, we need 3 x /24 = /22
https://cloud.google.com/kubernetes-engine/docs/concepts/alias-ips#defaults_limits


NEW QUESTION # 285
You are creating a new GKE standard cluster. You need to configure the cluster to ensure that pods can reach other VMs in Google Cloud in the 192.168.0.0/24 subnet using the source IP of the GKE nodes. What should you do?

Answer: C

Explanation:
By default, GKE uses SNAT (Source Network Address Translation) for pod egress traffic to destinations outside the cluster's IP ranges but within RFC 1918 private IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0
/16). This means that traffic from pods leaving the cluster for these private IP destinations will have their source IP address translated to the node's IP address.
To ensure pods can reach VMs in the 192.168.0.0/24 subnet using the source IP of the GKE nodes, you want the default SNAT behavior to apply to this destination. The default SNAT rule applies when the destination is an RFC 1918 address and the source is a pod IP that is not within the same RFC 1918 range as the destination (e.g., if your pods are in a 10.x.x.x range and the destination is 192.168.x.x).
Therefore, you should:
Set a GKE pod IP address range that fits in 10.0.0.0/8: This ensures that the pod IPs are within an RFC 1918 range different from 192.168.0.0/24.
Do NOT configure the --disable-default-snat flag: If you disable default SNAT, pods would use their own IP addresses as source IPs, which might not be routable to the 192.168.0.0/24 subnet unless specific routes are configured. The goal is to use the node's IP.
The combination of having pod IPs in a different RFC 1918 range and not disabling default SNAT ensures that GKE performs SNAT, making the node's IP the source for traffic destined for the 192.168.0.0/24 subnet.
Exact Extract:
"By default, GKE performs SNAT (Source Network Address Translation) for egress traffic from pods to destinations outside the cluster's IP address ranges but within the private IP address ranges defined in RFC
1918 (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16). When SNAT occurs, the source IP address of the egress packets is the node's IP address instead of the pod's IP address."
"The --disable-default-snat flag, when used, disables this default SNAT behavior. If you want traffic to use the node's IP as the source when reaching internal RFC 1918 destinations, do not set this flag."Reference:
Google Kubernetes Engine Documentation - IP masquerade agent, Private IP addresses for GKE Pods and Services


NEW QUESTION # 286
You are configuring a new instance of Cloud Router in your Organization's Google Cloud environment to allow connection across a new Dedicated Interconnect to your data center Sales, Marketing, and IT each have a service project attached to the Organization's host project.
Where should you create the Cloud Router instance?

Answer: D

Explanation:
Reference:
https://cloud.google.com/interconnect/docs/how-to/dedicated/using-interconnects-other-projects


NEW QUESTION # 287
Your company has a security team that manages firewalls and SSL certificates. It also has a networking team that manages the networking resources. The networking team needs to be able to read firewall rules, but should not be able to create, modify, or delete them.
How should you set up permissions for the networking team?

Answer: B


NEW QUESTION # 288
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