the most basic form of security. Access to network resources is granted based on who the user
is and whether that user has authorization to access the information. Routers can be configured
with access lists to provide intranetwork security. Because these types of filters provide limited
firewall capability, they are sometimes referred to as a poor man's firewall. Firewalls block all
users who are not authorized to access the network.
through the network. Encryption is the process of scrambling data so that it cannot be
understood by anyone other than the sender or receiver. If a packet is intercepted, the scrambled
contents render it unintelligible.
necessary component of business is change and growth. Without it, the business will die. As the
business changes and grows, the design requirements that support the business must change as
well. Scalability, which is defined as the capability to keep up with changes and growth, is a
critical component of network design.
traffic throughput, and host/client computer throughput speeds. When the CCDP asks a
customer what they expect from a network, the CCDP is likely to be told to design and deliver
a network that: