Which enterprise caching mode eliminates the need for Layer 4 switches or WCCP enabled
routers to intercept user requests?

A.
transparent

B.
proxy

C.
reverse proxy

D.
direct

Explanation:
In proxy mode, end-user web browsers need to be explicitly configured to the IP address or host
name of the Content Engine, and there is no need for additional hardware such as Layer 4
switches or Web Cache Communication Protocol (WCCP)-enabled routers to intercept user
requests, as in transparent caching. Enterprises are normally interested in deploying transparent
network caching, but some enterprises may have a legacy requirement for a proxy
(nontransparent) cache.
Reference: Arch student guide p.12-12