The coverage zone map (czm) or coverage zone file (zcf) is a file that maps network prefixes to cachegroups. See Localization.
A grouping of content in the CDN, usually a determined by the URL hostname. See Delivery Service.
edge (tier or cache)
Closest to the client or end-user. The edge tier is the tier that serves the client, edge caches are caches in the edge tier. In a Traffic Control CDN the basic function of the edge cache is that of a Reverse Proxy. See also Cache Group.
(traffic ops) extension
Using extensions, Traffic Ops be extended to use proprietary checks or monitoring sources. See Traffic Ops Extension.
A proxy that works that acts like it is the client to the origin. See Forward Proxy.
geo localization or geo routing
Localizing clients to the nearest caches using a geo database like the one from Maxmind.
Finding location on the network, or on planet earth. See Localization.
mid (tier or cache)
The tier above the edge tier. The mid tier does not directly serves the end-user and is used as an additional layer between the edge and the origin. In a Traffic Control CDN the basic function of the mid cache is that of a Forward Proxy. See also Cache Group.
The source of content for the CDN. Usually a redundant HTTP/1.1 webserver.
parent (cache or cachegroup)
The (group of) cache(s) in the higher tier. See Cache Group.
A group of settings (parameters) that will be applied to a server. See Profile.
A proxy that acts like it is the origin to the client. See Reverse Proxy.