Information Technology Reference
In-Depth Information
e-commerce, VPN, and WAN modules that connect the enterprise to the service
provider's facilities. The SP edge area provides Internet, public switched telephone net-
work (PSTN), and WAN services to the enterprise.
Enterprise Campus
SP Edge
WAN/Internet
Remote
Modules
Key
To p i c
Enterprise Edge
Data Center
E-Commerce/
DMZ/Internet
Enterprise
Branch
ISP 1
ISP 2
Enterprise
WAN
MPLS/MAN
Frame Relay
ATM
Enterprise
Data Center
Campus
Core
Building
Distribution
Enterprise
Teleworkers
Remote
Access VPN
Building
Access
PSTN
Figure 2-5
Cisco Enterprise Architecture Model
The network management servers reside in the campus infrastructure but have tie-ins to all
the components in the enterprise network for monitoring and management.
The enterprise edge connects to the edge-distribution module of the enterprise campus.
In small and medium sites, the edge distribution can collapse into the campus backbone
component. It provides connectivity to outbound services that are further described in
later sections.
Enterprise Campus Module
The enterprise campus consists of the following submodules:
Campus core
■
Building distribution
■
Building access
■
Server farm/data center
■
Figure 2-6 shows the Enterprise Campus model. The campus infrastructure consists of the
campus core, building distribution, and building access layers. The campus core provides a
