Evolving
Computer Networking
Modern-day networks deliver more than connectivity. Organizations
are embarking on transforming themselves digitally. Their networks are critical
to this transformation and to their success. The types of network architectures
that are evolving to meet these needs are as follows:
v Software-defined (SDN): In
response to new requirements in the "digital" age, network
architecture is becoming more programmable, automated, and open. In
software-defined networks, routing of traffic is controlled centrally through
software-based mechanisms. This helps the network to react quickly to changing
conditions.
v Intent-based: Building on SDN principles,
intent-based networking (IBN) not only introduces agility but also sets up a
network to achieve desired objectives by automating operations extensively,
analyzing its performance, pinpointing problematic areas, providing all-around
security, and integrating with business processes.
v Virtualized: The underlying physical network
infrastructure can be partitioned logically, to create multiple "overlay"
networks. Each of these logical networks can be tuned to meet specific
security, quality-of-service (QoS) and other requirements.
v Controller-based: Network controllers are crucial to
scaling and securing networks. Controllers automate networking functions by
translating business intent to device configurations, and they monitor devices
continuously to help ensure performance and security. Controllers simplify
operations and help organizations respond to changing business requirements.
v Multi-domain integrations: Larger enterprises may construct
separate networks, also called networking domains, for their offices, WANs and
data centers. These networks communicate with one another through their
controllers. Such cross-network, or multi-domain, integrations generally
involve exchanging relevant operating parameters to help ensure that desired
business outcomes that span network domains are achieved.
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