Full Answer
What is VPC and how does it work?
A virtual private cloud (VPC) is a virtual network dedicated to your AWS account. It is logically isolated from other virtual networks in the AWS Cloud. You can specify an IP address range for the VPC, add subnets, add gateways, and associate security groups. A subnet is a range of IP addresses in your VPC.
Why is a VPC used?
Q: Why should I use Amazon VPC? Amazon VPC enables you to build a virtual network in the AWS cloud - no VPNs, hardware, or physical datacenters required. You can define your own network space, and control how your network and the Amazon EC2 resources inside your network are exposed to the Internet.
What is meant by VPC in AWS?
Amazon Virtual Private Cloud (Amazon VPC) enables you to launch AWS resources into a virtual network that you've defined. This virtual network closely resembles a traditional network that you'd operate in your own data center, with the benefits of using the scalable infrastructure of AWS.
What is the difference between VPC and VPN?
A VPC is a private network on the cloud. Multiple VPCs can be created in the same region but are isolated from each other. A VPC can be divided into multiple subnets. A VPN gateway is created based on a VPC and is the access point of a VPN connection.
Is VPC a private cloud?
A virtual private cloud (VPC) is a private cloud computing environment contained within a public cloud. Essentially, a VPC provisions logically isolated sections of a public cloud in order to provide a virtual private environment.
How do you connect VPC to the internet?
Access the internet from a subnet in your VPCCreate a subnet.Create and attach an internet gateway.Create a custom route table.Create a security group for internet access.Assign an Elastic IP address to an instance.Detach an internet gateway from your VPC.Delete an internet gateway.
How many internet gateways does a VPC have?
one internet gatewayYou can attach only one internet gateway to a VPC at a time.
How do I create a VPC?
To create your VPC using the VPC wizard Open the Amazon VPC console at https://console.aws.amazon.com/vpc/ . On the VPC Dashboard, choose Launch VPC Wizard. Under Step 1: Select a VPC Configuration, on VPC with a Single Public Subnet, choose Select. Enter the following information into the wizard and choose Create VPC.
What are the components of VPC?
These components are:VPC CIDR Block.Subnet.Gateways.Route Table.Network Access Control Lists (ACLs)Security Group.
Do you need a VPN for VPC?
You can use an AWS managed VPN connection or a third-party VPN solution. Use a third-party solution if you require full access and management of the AWS side of the VPN connection. After creating your connection, you can download the Internet Protocol Security (IPsec) VPN configuration from the VPC console.
Is VPS and VPC same?
Both a VPS and a VPC distributes resources and hosts applications, but a VPS is, essentially, a VM used as a server, whereas a VPC is a full private cloud environment.
What is the difference between VPC and subnet?
Virtual Private Cloud (VPC) networks are global resources. Each VPC network consists of one or more IP address range called subnets. Subnets are regional resources, and have IP address ranges associated with them. In Google Cloud, the terms subnet and subnetwork are synonymous.
What is the benefit of using a VPC over not using it?
Savings: Because VPCs are within a public cloud, customers still benefit from economies of scale, sharing costs with other organizations without compromising the aforementioned security. Easy integration. A VPC can be integrated with other VPCs, the public cloud, or an on-premise infrastructure.
Is VPC mandatory in AWS?
Running applications on AWS? You need a VPC: a virtual private network that keeps your servers safe from the ravages of the public internet, just like they were in your old data center. Or so went the guiding philosophy of what we might call cloud 1.0 — the IaaS wave, when EC2 was king.
What is the difference between EC2 and VPC?
With EC2-Classic, your instances run in a single, flat network that you share with other customers. With Amazon VPC, your instances run in a virtual private cloud (VPC) that's logically isolated to your AWS account.
What is VPC in networking?
A Virtual Private Cloud (VPC) network is a virtual version of a physical network, implemented inside of Google's production network, using Andromeda.
VPCs and subnets
A virtual private cloud (VPC) is a virtual network dedicated to your AWS account. It is logically isolated from other virtual networks in the AWS Cloud. You can launch your AWS resources, such as Amazon EC2 instances, into your VPC.
Default and nondefault VPCs
If your account was created after 2013-12-04, it comes with a default VPC that has a default subnet in each Availability Zone. A default VPC has the benefits of the advanced features provided by EC2-VPC, and is ready for you to use.
Route tables
A route table contains a set of rules, called routes, that are used to determine where network traffic from your VPC is directed. You can explicitly associate a subnet with a particular route table. Otherwise, the subnet is implicitly associated with the main route table.
Access the internet
You control how the instances that you launch into a VPC access resources outside the VPC.
Access a corporate or home network
You can optionally connect your VPC to your own corporate data center using an IPsec AWS Site-to-Site VPN connection, making the AWSCloud an extension of your data center.
Connect VPCs and networks
You can create a VPC peering connection between two VPCs that enables you to route traffic between them privately. Instances in either VPC can communicate with each other as if they are within the same network.
AWS private global network considerations
AWS provides a high-performance, and low-latency private global network that delivers a secure cloud computing environment to support your networking needs.
Amazon VPC concepts
Amazon VPC is the networking layer for Amazon EC2. If you're new to Amazon EC2, see What is Amazon EC2? in the Amazon EC2 User Guide for Linux Instances to get a brief overview.
Access Amazon VPC
You can create, access, and manage your VPCs using any of the following interfaces:
Pricing for Amazon VPC
There's no additional charge for using a VPC. There are charges for some VPC components, such as NAT gateways, Reachability Analyzer, and traffic mirroring. For more information, see Amazon VPC Pricing .
Amazon VPC quotas
There are quotas on the number of Amazon VPC components that you can provision. You can request an increase for some of these quotas. For more information, see Amazon VPC quotas .
What is VPC Used For?
Anything that a regular private cloud can do, from running code to storing data to hosting web applications , VPC can also do. The only limitation is that normally a virtual private cloud is hosted by a public cloud provider.
How Does VPC Work?
Once you know what VPC is, you might wonder how these virtual clouds actually work?
Why is VPC hosted on cloud?
If your VPC runs a global web application, being hosted on a cloud means better performance for users worldwide than on-premise servers.
What is a VLAN?
If LAN is a local area network (a group of computers connected to each other), VLAN is a virtual LAN, created to bring the company’s computers together while separating them from the rest.
What is virtual cloud?
A virtual public cloud is a separate company office in one of the big public towers. While no one can just go into the office without authorization, and the company can outfit and renovate the office they way they like, they are still located within the public environment of an office building.
What are some examples of isolation?
Some examples of such isolation are unique IP addresses, a VLAN and a VPN.
What is the best thing about hosting on the cloud?
One of the best aspects of being hosted on a public cloud is near infinite scalability. VPC’s customers can simply add more resources in real time, whenever they need to.
What is VPN encryption?
VPN: VPN or virtual private network uses an encryption key to create a secure and private network that encrypts the company traffic. So it can’t be accessed by anyone else.
What is virtual private cloud?
As we discussed above, a virtual private cloud builds a private space in the public cloud and keeps aside the additional computing resources of the public cloud for itself.
What is a VLAN?
VLAN: A virtual local area network or VLAN is slightly different from a LAN. In the case of a LAN, several computers are connected with each other and restricted to a specific geographic area. Whereas in the case of a VLAN multiple LAN segments are created with just one bandwidth.
How many tenants does a private cloud have?
A regular private cloud houses just one tenant, the whole server is for just one company.
What is subnet in a network?
Subnets: Basically, the subnet is a range of IP addresses within a network that is dedicated to the company having ownership of a particular VPC. This helps in segregating a specific part of a network for private use. This range is not visible to the wider public and can be accessed only by the owner.
Is a private cloud a VPC?
The things that private cloud can also be a VPC ie: storing data, running codes, hosting websites. However, the only limitation is that the virtual private cloud is generally offered by the public cloud vendor.
Can a company build a private cloud?
With VPC any company can build its own secure private cloud-based environment on top of a shared public infrastructure. By doing so, the companies will have full access to the server and don’t have to share the resources.
What does Nexus 1 do when it sends out LACP PDU?
When Nexus-1 sends out LACP PDU eth1/1 for first time, it will have it's Actor information (System, System Priority, Port, Key, Port-Priority, State) & default Partner information. After LACP PDU is received in Nexus-2 at eth1/1, it extracts the following information from it:
What information does Nexus 1 have?
When Nexus-1 sends out LACP PDU eth1/1 for first time, it will have it's Actor information (System, System Priority, Port, Key, Port-Priority, State) & default Partner information. After LACP PDU is received in Nexus-2 at eth1/1, it extracts the following information from it: 1. Actor Port Number. 2.
How to identify a set of interfaces between 2 switches?
The set of interfaces between 2 switches that can aggregate are identified by combining the System ID and Key at each end of the links. Key value usually derived by the port-channel number itself or can be a corresponding value for it. Therefore, LACP System-ID & Key decides weather to put bundle the interface in port-channel.
What is a vPC?
vPC (virtual Port-Channel) is one of most popular feature used on Cisco's datacenter Nexus Platforms. This may sound pretty straight forward, however there's lot of intelligent tech is used behind the scene. So, without any further delay, let's go and see how it really works?
What is a UL bit?
The LG or UL bit distinguishes vendor assigned and administratively assigned MAC addresses. When we administratively change the MAC address of device/NIC to another address, then it should be set to one. However, many NIC/cards do not enforce this, and normally application does not rely on this.
What is IEEE 802.3 address?
As per IEEE 802.3 standard, this is assigned as Slow_Protocols_Multicast address. Also check the IG (Individual / Group) bit in same, being set (1) which would help switch to identify it's a multicast address.
Is LACP mandatory for VPC?
Question 1: "is LACP mandatory for vPC?" - No. We can use mode "On" & just bring UP port-channel without any negotiation/checks, basically we are turning off the LACP or any other control protocols for it.
