NETTECH - REVIEWER - MIDTERMS

Elastic Cloud Server (ECS)

Is a basic computing unit that consists of vCPUs, memory, an OS, and Elastic Volume Service (EVS) disks.

Bare Metal Server (BMS)

Combines the scalability of VMs with the high performance of physical servers.

Image Management Service (IMS)

Allows you to manage the entire lifecycle of your images.

Image

A server or disk template that contains an operating system (OS), service data, and necessary application software, such as database software.

Public image

Is a standard image provided by the cloud platform and is available to all users.

Private image

Is only available to the user who created it.

Shared image

Is a private image another user has shared with you.

Marketplace image

Is a third-party image published in the Marketplace.

Auto Scaling (AS)

Automatically adjusts resources to keep up with changes in demand based on pre-configured AS policies.

AS group

Consists of a collection of instances and AS policies that have similar attributes and apply to the same scenario.

AS configuration

Is a template specifying specifications for the instances to be added to an AS group.

AS policy

Can trigger scaling actions to adjust the number of instances in an AS group.

Scaling action

Adds instances to or removes instances from an AS group.

Cooldown period

Specifies how long any alarm-triggered scaling action will be disallowed after a previous scaling action is complete.

Cloud Container Engine (CCE)

Is a highly scalable, high-performance, enterprise-class Kubernetes service for you to run containers and applications.

Dedicated Host (DeH)

Is a physical server fully dedicated to your own services.

FunctionGraph

Allows you to run your code without provisioning or managing servers, while ensuring high availability and scalability.

Virtual Private Cloud (VPC)

Is a logically isolated virtual network.

Elastic Network Interface

Is a virtual network card.

Subnet

Is a unique CIDR block, a range of IP addresses, in your VPC.

Elastic IP (EIP)

Enables your cloud resources to communicate with the Internet using static public IP addresses and scalable bandwidths.

Route table

Contains a set of routes that are used to determine where network traffic from your subnets in a VPC is directed.

Security group

A collection of access control rules for ECSs that have the same security requirements and are mutually trusted within a VPC.

VPC peering connection

A network connection between two VPCs in the same region.

Network ACL

Allows you to create rules to control traffic in and out of one or more subnets.

Virtual IP address

Can be shared among multiple ECSs.

Elastic Load Balance (ELB)

Automatically distributes incoming traffic across multiple backend servers based on the listening rules you configure.

Load balancer

An instance that distributes incoming traffic across backend servers in one or more availability zones (AZs).

Listener

Uses the protocol and port you specify to check for requests from clients and route the requests to associated backend servers based on the listening rules you define.

Backend server group

Uses the protocol and port you specify to receive the requests from the load balancer and route them to one or more backend servers.

Single point of failure (SPOF)

Is a part of a system that, if it fails, will stop the entire system from working.

Virtual Private Network (VPN)

Allows you to establish an encrypted, Internet-based communications tunnel between your on-premises data center and a VPC, so you can access resources in the VPC remotely.

NAT Gateway

Provides network address translation (NAT) service for servers in a VPC and enables servers to share an EIP to access the Internet.

Source Network Address Translation (SNAT)

Translates private IP addresses into EIPs, allowing servers in a VPC to share an EIP to access the Internet in a secure and efficient way.

Destination Network Address Translation (DNAT)

Enables servers in a VPC to share an EIP to provide services accessible from the Internet through IP address mapping or port mapping.

Domain Name Service (DNS)

Provides highly available and scalable authoritative DNS services that translate domain names into IP addresses required for network connection, reliably directing end users to your applications.

VPC Endpoint (VPCEP)

Enables you to access HUAWEI CLOUD services or your own private services securely.

Direct Connect

Allows you to establish a dedicated network connection that features high speed, low latency, stability, and security between your on-premises data center and the cloud.

Cloud Connect

Allows you to connect the VPCs to build a globally connected cloud network with enterprise-grade scalability and communication capabilities.