Information Technology Reference
In-Depth Information
This chapter covers the design of LANs. It reviews LAN media, components, and design
models. Figure 3-1 shows the Enterprise Campus section of the Enterprise Composite
Network model. Enterprise LANs have a campus backbone and one or more instances of
building-distribution and building-access layers, with server farms and an enterprise edge
to the WAN or Internet.
Enterprise Campus
Server Farm/Data Center
Edge
Distribution
Campus
Core
Building
Distribution
Building
Access
Figure 3-1
Enterprise Campus
This section identifies some of the constraints you should consider when provisioning var-
ious LAN media types. It covers the physical specifications of Ethernet, Fast Ethernet,
and Gigabit Ethernet.
Yo u m u s t a l s o u n d e r s t a n d t h e d e s i g n c o n s t r a i n t s o f w i r e l e s s L A N s i n t h e c a m p u s n e t w o r k .
Specifications for wireless LANs are covered in Chapter 5, “Wireless LAN Design.”
