How are data centers connected to each other?

The purpose of modern data center networks is to accommodate multiple tenants of data centers with a variety of workloads. In this network, the servers are the components that provide the requested services to the users (and the programs that work on their behalf).

The simplest network services may be the responses to calls to API functions. Servers can also provide applications to users / clients, through web protocols, language platforms or virtual machines that provide users with full desktops.

Inside Data Center Networking:

Today, few business workloads, and progressively less consumer and entertainment workloads, run on individual computers, hence the need for data center networks. Networks provide servers, clients, applications and middleware with a common map with which to organize the execution of workloads, and also with which to manage access to the data they produce.

Coordinated work between servers and clients in a network is the workflow that requires a data center network between resources. The data is exchanged between servers and clients, although for modern data centers, there is no central supervisor of such exchanges.

A conventional data center network comprises: servers that manage workloads and respond to customer requests; switches that connect devices to each other; routers that perform packet forwarding functions; controllers that manage the workflow between network devices; gateways that serve as junctions between data center networks and the wider Internet; and clients that act as consumers of the information in data packets.

The resources in the network share a common mapping system based on network technologies or standards. For modern networks, this shared map is often based on Internet Protocol (IP), Ethernet and other related network technologies. Layer 3 IP addresses (IP routing) are designed to provide intermediate forwarding agents in a network, called routers, clues about the general address along which to move packets to data. Using the transport control protocol (TCP / IP), routers pass data packets to each other, literally in a riddle effort.

Another common data center technology is Ethernet, which connects devices using media access control (MAC) addresses. To overcome the limitations of these basic network technologies, many additional network protocols have been developed, including VXLAN and Open Flow, some of which can be run as an "overlay" found at the top of the basic network infrastructure.

These components form the data center network infrastructure. As the infrastructure evolves, none of the functions of these components with independent physical devices should no longer be fulfilled. Virtualization allows the software to play the role of any or all of these components.

Software-Defined Data Center Networking

In a software-defined network (SDN), the dynamics of data center workflows change, to accommodate variable workloads more effectively and efficiently. Specifically, the workflow is divided into two categories: the content of the documents or media used by customers (the data plane) and instructions on how the network should accommodate this data (the control plane). In this way, an SDN controller can make radical adjustments in the way the data plane is assigned, even while a workflow is running, without compromising the control plane and the connections that link the components of the net.

A data center today is less subject to physical and geographical restrictions than ever. Technically, a data center is the collection of components that share a common map of IP addresses with each other, and that can be (although not necessarily) linked by a common domain. To the extent that the bandwidth of the underlying infrastructure allows it, a single data center can cover the entire world.

However, in conventional use, companies and public services continue to perceive their data centers as the collection of servers that operate in premises they own or rent. However, even this interpretation is being worn out by the new realities, the most prominent of these is the availability of cloud-based infrastructure and platforms made available to companies "as a service", sold by subscription or pay per use. Let's go, base.

How the Cloud Remaps Data Centers:

The cloud has evolved to mean using network virtualization to separate physical processors from the services they provide. This may not sound much like the colloquial term "the cloud," with which consumers refer to the undetermined storage space that contains their synchronized documents. However, cloud data centers, as consumers realize, were made possible through virtualization.

For example, multi-volume distributed file systems spanning a variety of domains are virtualized component products that separate addressable files from physical file systems. In large data center networks, SDN controllers are responsible for managing these components; In smaller, though still fairly large, enterprise network networks, virtual network overlays performed by workload orchestrators allow file system grouping.

As the nature of data center networks becomes increasingly disaggregated, the notion of "center" becomes almost entirely abstract. Instead of where assets are managed and operated, a data center network can now be no more concrete than gathering information technology resources that are accessible to each other - that a business owns or leases, or where sign

This article was originally published on ------- Read More