classless interdomain routing (CIDR)
Using network prefixes to aggregate routes to multiple network blocks
('supernetting'). This replaced the old method of assigning class-based IP
addresses based on the network size.
client-server
A model where a server provides resources or services to one or more clients.
cloud access security broker (CASB)
A security policy enforcement point placed between cloud service consumers
and providers to enforce security policies.
cloud deployment model
The specific configuration of cloud services, such as public, private, or hybrid
cloud.
cloud direct connection
A dedicated connection to a cloud service provider that bypasses the public
internet.
,cloud gateway
A point of access to a cloud service that allows for data transfer between on-
premises infrastructure and the cloud.
cloud service model
The type of service provided by a cloud provider, such as IaaS, PaaS, or SaaS.
clustering
A method of linking multiple servers to work together as a single system to
improve performance and availability.
Administration paradigm
An arrangement where some host machines provide server and services, while
others are client devices that consume those services.
Enterprise management software
Software designed to mediate access to cloud services by users across all
types of devices.
Cloud ownership classification
The categorization of cloud ownership and management as public, private,
community, or hybrid.
,Dedicated connection
A connection between the on-premises network and a cloud service provider.
Virtual router
In cloud infrastructure, a virtual router that facilitates routing between subnets
and public networks.
External connectivity
Connectivity that can be provisioned using various types of NAT and VPN.
Cloud service classification
The classification of cloud services and the limit of the cloud service provider's
responsibility as software, platform, infrastructure, etc.
Load balancing technique
A method where a group of servers is configured as a unit to provide network
services.
Co-channel interference (CCI)
A troubleshooting issue where access points within range of one another are
configured to use the same channel, causing increased contention.
Coarse wavelength division multiplexing (CWDM)
Technology for multiplexing up to 16 signal channels on a single fiber using
different wavelengths.
, Coaxial
Media type using two separate conductors that share a common axis
categorized using the Radio Grade (RG) specifications.
Cold site
A predetermined alternate location where a network can be rebuilt after a
disaster.
Collapsed core
A two-tier hierarchical network topology where access layer switches
connect directly to a full mesh core layer.
Collision domain
A network segment where nodes are attached to the same shared access
media, such as a bus network or Ethernet hub.
Colocation
Deploying private servers, network appliances, and interconnects to a
hosted datacenter facility shared with other customers.
Command and control (C&C or C2)
Infrastructure of hosts and services with which attackers direct, distribute, and
control malware over botnets.