Networking Flashcards
What is a Virtual Network (VNET).
It allows communication in and out of AWS. You have access to the network, but not the underlying hardware.
Every VNET belongs to a single region, and every resource on the VNET must be in the same region too.
Each VNET belongs to a single subscription, each subscription can have more than 1 VNET.
What is a Load Balancer?
Load Balancers distribute new flows that arrive at the LB’s frontend to backend pool instances, according to rules and health probes.
What is a VPN Gateway
A VPN Gateway is a specific type of Virtual network gateway that is used to send encrypted traffic from Azure over the public internet.
Application Gateway
This is an application specific load balancer, it makes decisions based on HTTP requests, and NOT ports and IP Addresses.
VNET advantages ?
1) Scaling - Adding more VNETS or more addresses is simple.
2) High Availability - You can peer VNETs using a load balancer or using a VPN gateway.
3) Isolation - You can manage and organise resources with sibnets and network security groups.
VNET advantages ?
1) Scaling - Adding more VNETS or more addresses is simple.
2) High Availability - You can peer VNETs using a load balancer or using a VPN gateway.
3) Isolation - You can manage and organise resources with subnets and network security groups.
VNET advantages ?
1) Scaling - Adding more VNETS or more addresses is simple.
2) High Availability - You can peer VNETs using a load balancer or using a VPN gateway.
3) Isolation - You can manage and organise resources with subnets and network security groups.
VNET peering benefits :
1) Low Latency, High Bandwidth connections.
2) Link Separate Networks - Resources in separate virtual networks can communicate with each other.
3) Data Transfer - Transfer data easily between subscriptions and deployment models in separate regions.
What is a Virtual Network Gateway?
It is composed of 2 of more machines that you create that are assigned to a gateway network.
What are the benefits of using an Application gateway?
- Scaling (up or down based on traffic)
- Encryption.
- Zone Redundancy - Span Multiple availability zones and improve fault resiliency.
- Multi-Site Hosting - Can be used for up to 100 websites per gateway.
What is a CDN ?
This is a content delivery network.
- It is a distributed network of servers that deliver content to users across the world.
- Content is delivered from a cached server (edge node) closer to the user to provide faster responses.
- Data on edge nodes have an expiry date, so the data is refreshed to ensure the content is fresh and up to date.
What is Express Route ?
This is a private site to site connection between a company and an Azure data centre.
* It does not run over the Internet.
