Now that you have completed this
chapter, you should a have a firm understanding of the following
concepts:
-
Broadcasts are useful and necessary
traffic; however, too much broadcast traffic can cause network
performance problems. Managing broadcast traffic is a critical
aspect of campus LAN design.
-
The location of common workgroups and
servers can have a significant impact on traffic patterns.
-
Adding additional bandwidth is not the
long-term solution to meeting the needs of high-priority
traffic.
-
Multilayer switching combines Layer 2
switching and Layer 3 routing functionality.
-
The multilayer design model is
inherently scalable. Layer 3 switching performance scales because it
is distributed. Backbone performance scales as you add more links or
more switches.
-
A switch block is the unit that contains
distributed network services and network intelligence. A switch
block consists of Layer 2 switches, Layer 3 routers, and, sometimes,
distributed servers.
-
A core block is the unit that transfers
cross-campus traffic. It can consist of Layer 2 or Layer 3
devices.
-
The purpose of network link redundancy
is to provide alternate physical pathways through the network in
case one pathway fails.
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