Cloud Networking Services: Virtual Private Clouds (VPCs), Subnets, Routing, and Security Groups

Question 1

What is the primary purpose of security groups in cloud networking?

Accepted Answer

To control the flow of network traffic into and out of instances

Answer

To encrypt data in transit

Answer

To provide intrusion detection and prevention

Answer

To ensure high availability and redundancy

Question 2

What type of configuration is required to enable communication between two subnets in different availability zones?

Accepted Answer

Routing table modification

Answer

Public IP address assignment

Answer

NAT gateway creation

Answer

VPN tunnel establishment

Question 3

Which of the following is a cloud networking service that provides secure, private connectivity between on-premises networks and cloud environments?

Accepted Answer

Virtual Private Network (VPN)

Answer

Cloud Load Balancing

Answer

DNS (Domain Name System)

Answer

Firewall as a Service (FWaaS)

Question 4

What is the purpose of a Network Address Translation (NAT) gateway in a VPC?

Accepted Answer

To provide public IP addresses to instances in a private subnet

Answer

To filter inbound and outbound traffic based on security rules

Answer

To establish secure communication channels between different VPCs

Answer

To monitor and analyze network traffic patterns

Question 5

What is the primary objective of implementing security groups in cloud networking?

Accepted Answer

Regulate network access

Answer

Define firewall rules

Answer

Isolate network resources

Answer

Provide encryption

Question 6

When configuring security groups, which practice is considered a best practice?

Accepted Answer

Establish distinct security groups for each resource type

Answer

Utilize the most extensive range of ports possible

Answer

Allow unrestricted incoming traffic

Answer

Deny all incoming traffic

Question 7

Describe the key difference between a public and a private subnet.

Accepted Answer

Public subnets have internet access, in contrast to private subnets

Answer

Private subnets have internet access, in contrast to public subnets

Answer

Public subnets are accessible only within the VPC, while private subnets are accessible from the internet

Answer

Private subnets are accessible only within the VPC, while public subnets are accessible from the internet

Question 8

Which cloud service enables you to create a private network within the cloud platform?

Accepted Answer

Virtual Private Cloud (VPC)

Answer

Cloud Storage

Answer

Compute Engine

Answer

BigQuery

Question 9

Which routing protocol is widely used in cloud environments for exchanging routing information?

Accepted Answer

Border Gateway Protocol (BGP)

Answer

Open Shortest Path First (OSPF)

Answer

Routing Information Protocol (RIP)

Answer

Enhanced Interior Gateway Routing Protocol (EIGRP)

Question 10

Which tool is commonly used for configuring and managing cloud networking components through a command-line interface?

Accepted Answer

Google Cloud SDK

Answer

Terraform

Answer

Ansible

Answer

Puppet

Question 11

What is the primary function of network load balancing in cloud environments?

Accepted Answer

Distributing incoming network traffic across multiple servers

Answer

Improving network security

Answer

Reducing network latency

Answer

Enhancing fault tolerance

Question 12

Which of the following is NOT a commonly used cloud networking architecture?

Accepted Answer

Bus

Answer

Hub-and-spoke

Answer

Peered

Answer

Star

Question 13

**Understanding Virtual Private Clouds (VPCs)**
What is the primary purpose of a VPC in the cloud?

Accepted Answer

To provision a logically isolated private network within a public cloud environment.

Answer

To establish connections between multiple cloud providers.

Answer

To host and manage cloud data and applications.

Question 14

**Routing Functionality in Cloud Networks**
What is the primary function of a routing table in a cloud network?

Accepted Answer

To direct network traffic between subnets and network gateways.

Answer

To implement security policies and filter traffic based on predefined rules.

Answer

To establish private network connections between on-premises and cloud resources.

Answer

To provide Domain Name System (DNS) services for the network.

Question 15

**Security Groups in the Cloud**
How do security groups enhance network security in cloud deployments?

Accepted Answer

By defining rules that control the flow of inbound and outbound network traffic.

Answer

By encrypting data transmissions between resources.

Answer

By isolating virtual machines from each other within a subnet.

Question 16

**Best Practices for Subnet Design**
Which subnet design principle is a recommended best practice for VPCs?

Accepted Answer

Create subnets based on logical groupings of resources and specific security requirements.

Answer

Configure all subnets with the largest available CIDR range.

Answer

Utilize a single large subnet for all resources in a VPC.

Question 17

**Inter-Availability Zone Connectivity**
How can you establish communication between resources located in different availability zones within a single VPC?

Accepted Answer

Utilize private IP addresses and configure appropriate routing rules.

Answer

Establish a virtual private network (VPN) connection between the availability zones.

Answer

Create a direct physical connection between the network switches in each availability zone.

Question 18

**Network Gateway Functionality**
What is the primary purpose of a network gateway in a VPC network?

Accepted Answer

To provide connectivity between the VPC and external networks, such as the internet or on-premises networks.

Answer

To implement firewall rules and filter network traffic.

Answer

To secure traffic flow between subnets within the VPC.

Question 19

**Network Performance Optimization**
Which technique can effectively improve the performance of a VPC network?

Accepted Answer

Implement network load balancers to distribute incoming traffic across multiple resources.

Answer

Reduce the size of subnets to minimize latency.

Answer

Increase the number of network interfaces on each instance to enhance bandwidth.

Answer

Disable security groups for better network throughput.

Question 20

**Benefits of Managed Cloud Networking**
What is a primary advantage of utilizing a managed cloud networking service?

Accepted Answer

It simplifies network management by reducing the need for manual configuration and ongoing maintenance.

Answer

Managed services provide greater control and flexibility over network settings.

Answer

Managed services typically offer lower costs compared to self-managed networks.

Question 21

Within a Virtual Private Cloud (VPC), which logical isolation boundary spans multiple Availability Zones?

Accepted Answer

Subnet

Answer

Security Group

Answer

Route Table

Question 22

In cloud networking, what is the primary purpose of a route table?

Accepted Answer

To determine how traffic is routed within a VPC and to other networks.

Answer

To isolate traffic between different subnets within a VPC.

Answer

To define firewall rules and enforce security policies.

Question 23

Which cloud networking component primarily acts as a firewall?

Accepted Answer

Security Group

Answer

Route Table

Answer

Subnet

Answer

VPC

Question 24

What key benefit does a NAT gateway provide in a cloud network?

Accepted Answer

Allows private subnet instances to access the internet without exposing their IP addresses.

Answer

Enables direct communication between VPCs without using public IP addresses.

Answer

Provides encryption for data传输.

Question 25

What is the purpose of a VPC peering connection?

Accepted Answer

To privately connect two VPCs within the same region without traversing the public internet.

Answer

To enable communication between different subnets within a single VPC.

Answer

To provide encrypted communication between VPCs in different regions.

Question 26

Which advantage is offered by using the AWS Management Console for cloud networking management?

Accepted Answer

Provides a user-friendly graphical interface for easy configuration and monitoring.

Answer

Allows for faster deployment times compared to scripting.

Answer

Supports advanced automation capabilities not available in the AWS CLI.

Question 27

In a cloud environment, which approach is most effective for distributing traffic across multiple instances?

Accepted Answer

Utilize a load balancer.

Answer

Manually configure failover between instances.

Answer

Increase the capacity of individual instances.

Answer

Create separate subnets for each instance.

Question 28

Which security concern is a primary consideration when managing cloud networking services?

Accepted Answer

Protecting against distributed denial-of-service (DDoS) attacks.

Answer

Ensuring consistent resource utilization across all instances.

Answer

Maximizing network performance for high-priority applications.

Question 29

What is the primary function of a network ACL in cloud networking?

Accepted Answer

Controls traffic flow at the subnet level based on source and destination IP addresses and ports.

Answer

Provides instance-level firewall protection.

Answer

Defines the routing paths for traffic within a VPC.