What is the representation of the address range for a VPC?

B) Classless Inter-Domain Routing (CIDR) block

A) Dynamic Host Configuration Protocol (DHCP)

D) Network Access Control List (NACL)

Can you change the primary CIDR block after you create your VPC?

No, you must think carefully before creating a VPC

Yes, but only within the first 24 hours

Yes, but only if you have not launched any instances

What type of IPv6 CIDR does AWS assign to your VPC?

A publicly routable prefix from the global unicast IPv6 address space

An arbitrary IPv6 CIDR of your choice

A private IPv6 CIDR not reachable from the Internet

A secondary IPv6 CIDR based on your primary IPv4 CIDR

What command is used to view the state of a VPC in AWS?

aws ec2 describe-vpcs --vpc-ids [vpc-id]

aws ec2 view-vpcs --vpc-ids [vpc-id]

aws ec2 get-vpc-state --vpc-ids [vpc-id]

aws ec2 list-vpcs --vpc-ids [vpc-id]

What AWS CLI command can be used to delete an unneeded VPC?

aws ec2 delete-vpc --vpc-id vpc-a01106c2

aws ec2 terminate-vpc --vpc-id vpc-a01106c2

aws ec2 remove-vpc --vpc-id vpc-a01106c2

aws ec2 discard-vpc --vpc-id vpc-a01106c2

Can a subnet have multiple CIDRs?

No, a subnet can only have one CIDR

No, a subnet does not use CIDRs

What is an availability zone in the context of AWS?

A small geographic location analogous to a datacenter

A large geographic area like a continent

If the us-east-1a zone fails, what will happen to the instance web1?

It will fail because it is in that zone

It will automatically move to us-east-1b

Is having subnets in different availability zones a requirement?

No, but it is recommended for high availability

Yes, it is mandatory for all AWS configurations

Yes, but only for certain AWS services

What is the purpose of creating subnets in different availability zones?

To achieve resiliency for applications

To increase the cost of the infrastructure

To comply with legal requirements

To ensure all instances fail simultaneously

Refer to the diagram below. If the us-east-1b zone fails, what will happen to the instance web2?

It will fail because it is in that zone

It will automatically move to us-east-1a

What is the AWS CLI command to create a subnet in a specific VPC with a given CIDR block and availability zone?

aws ec2 create-subnet --vpc-id [vpc-id] --cidr-block 172.16.100.0/24 --availability-zone us-east-1a

aws ec2 create-subnet --vpc-id [vpc-id] --gateway-id 172.16.100.0/24 --zone us-east-1a

aws ec2 allocate-subnet --vpc-id [vpc-id] --cidr 172.16.100.0/24 --availability-zone us-east-1a

aws ec2 define-subnet --vpc-id [vpc-id] --network-block 172.16.100.0/24 --availability-zone us-east-1a

After creating a subnet, what is the next step to check its status?

aws ec2 describe-subnets --subnet-ids [subnet-id]

aws ec2 check-subnet --subnet-id [subnet-id]

aws ec2 get-subnet-status --subnet-id [subnet-id]

aws ec2 subnet-info --id [subnet-id]

Can an Elastic Network Interface (ENI) be attached to more than one subnet?

B) No, it is connected to only one subnet.

A) Yes, it can be attached to multiple subnets.

C) Yes, but only within the same Availability Zone.

D) No, it can only be attached to VPCs, not subnets.

What functionality does an Elastic Network Interface (ENI) provide to an instance?

C) It allows an instance to communicate with other network resources.

A) It allows an instance to communicate with the Internet only.

B) It provides additional storage to an instance.

D) It increases the computational power of an instance.

What is bound to the primary ENI of an instance that cannot be changed or removed?

The instance's availability zone

The instance's public IP address

Can secondary private IP addresses assigned to an ENI come from a different subnet than the ENI is attached to?

No, they must come from the same subnet

Yes, they can come from any subnet

Yes, but only if they are in the same availability zone

No, secondary private IP addresses are not allowed

What can you do with an ENI that is not attached to an instance?

It can be attached to an instance later

It cannot be used until it is deleted

It can only be used for monitoring purposes

It must be converted to a primary ENI before use

What is the purpose of associating an existing ENI that's not attached to an instance with a working instance as a secondary ENI?

To redirect traffic from a failed instance to a working instance

To increase the storage capacity of the instance

To change the primary private IP address of the working instance

To assign a new security group to the working instance

What is the command used to verify the status of a network interface?

aws ec2 describe-network-interfaces --network-interface-ids [network-interface-id]

aws ec2 check-network-status --interface-ids [network-interface-id]

aws ec2 get-network-interface --id [network-interface-id]

aws ec2 validate-network-interface --network-id [network-interface-id]

What does Enhanced Networking use to allow an instance direct access to the physical network interface on the host?

Single-root input/output virtualization (SR-IOV)

Network Address Translation (NAT)

What is the benefit of using Enhanced Networking compared to ENIs?

Higher network throughput and lower latency

Higher network throughput and higher latency

Lower network throughput and higher latency

Lower network throughput and lower latency

What is required for an instance's operating system to support enhanced networking with ENA?

Must include the appropriate drivers

No additional drivers are needed

Must be connected to an Internet gateway

Must create a default route in a route table

How is IP routing implemented in the VPC architecture?

Using dynamic routing protocols

AWS Certified Solutions Architect Associate (VPC)

Quiz

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Computers

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Professional Development

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Practice Problem

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William Rodriguez

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C) VPCs abstract physical hardware into software functions

D) VPCs cannot extend your network without additional physical hardware

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