1. Overview
    1. Google Cloud Network Service Tiers optimize connectivity between systems on the internet and Google Cloud instances
    2. Premium Tier delivers traffic via Google's premium backbone, while Standard Tier uses regular ISP network
    3. Use Premium Tier to optimize for performance, and the Standard Tier to optimize for cost
    4. Premium Tier is for services that need global availability, while the Standard tier is for services hosted entirely within a region
    5. Standard tier performance is comparable to other Cloud providers
    6. Egress pricing for each of the Network Service Tiers is different
  2. Premium Tier
    1. Delivers traffic from external systems to resources using Google's low latency, highly reliable global network
    2. Consists of the most extensive private fiber network with over 100 points of presence (POPs) around the globe
    3. Designed to tolerate multiple failures and disruptions while still delivering traffic
    4. Supports both regional external IPs and global external IPs for VM instances and load balancers
    5. Services that require global external IP addresses must use the Premium Tier
    6. Applications that use global load balancers with backends in more than one region require Premium Tier
    7. Ideal for customers with users in multiple locations worldwide who need the best network performance and reliability
    8. Incoming internet traffic enters Google's high-performance network at a POP closest to the sending system
    9. Within Google's network, traffic is routed from that POP to the VM in the VPC network or closest Cloud Storage bucket
    10. Outbound traffic is delivered through Google's global network, exiting at the POP closest to its destination
    11. Routing minimizes congestion and maximizes performance by reducing the number of hops between end users and the POPs closest to them
  3. Standard Tier
    1. Delivers traffic from external systems to Google Cloud resources by routing it over the internet
    2. Leverages the double redundancy of Google's network only up to the point where Google's data center connects to a peering metro
    3. Packets that leave Google’s network are delivered using a transit provider, and are subject to the reliability of that ISP
    4. Provides network quality and reliability comparable to that of other Cloud providers
    5. Regional external IP addresses can use either Premium Tier or Standard Tier
    6. Traffic from systems on the internet is routed over transit (ISP) networks before being sent to VMs in the VPC network or regional Cloud Storage buckets
    7. Outbound traffic normally exits Google's network from the same region used by the sending VM or Cloud Storage bucket, regardless of its destination
    8. Offers a lower-cost alternative for services that are not latency or performance sensitive or services that can be located within a single region