Calico is an open-source networking solution for containerized and cloud-native applications, offering a scalable network fabric for connecting and securing workloads. It utilizes a layer 3 architecture with BGP for routing, supports unique IP addressing for workloads, and allows for the definition of fine-grained network policies. Additionally, Calico is designed for scalability, multi-tenancy, and includes network security features to protect against unauthorized access.

1. Docker and Kubernetes
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2. • Calico is an open-source networking and network
security solution designed for containerized and cloud-
native applications.
• It provides a scalable and flexible network fabric for
connecting and securing workloads across multiple hosts
or clusters.
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3. Here are some key points about Calico networking:
• Architecture: Calico is based on the principles of a pure Layer 3
approach to networking. It uses standard routing protocols, such as
Border Gateway Protocol (BGP), to distribute routes and enforce
network policies.
• Network Connectivity: Calico enables connectivity between
containers, virtual machines (VMs), or physical hosts by assigning
each workload a unique IP address. It supports both IPv4 and IPv6
addressing.
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4. • Network Policies: Calico allows you to define fine-grained network
policies to control traffic flow between workloads. Policies can be
based on IP addresses, ports, protocols, or labels assigned to the
workloads.
• Scalability: Calico is designed to scale horizontally and handle large-
scale deployments. It leverages the BGP protocol to distribute
routes efficiently and handle dynamic network changes.
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5. • Multi-tenancy: Calico supports multi-tenancy, allowing you to
create isolated network environments for different
applications or user groups. Each tenant can have its own set
of network policies and address space.
• Network Security: Calico provides network security features,
such as ingress and egress filtering, to protect workloads from
unauthorized access.
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