Introduction to WAN
Overview of WAN
A WAN is a data communications network
that operates beyond the geographic scope
of a LAN.
CCNA Exploration AWAN (ITD3696) Module 1
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Characteristics of WAN
generally connect devices that
Access Control List
Packet filtering, sometimes called
static packet filtering, controls
access to a network by analyzing
the incoming and outgoing packets
and passing or halting them based
on stated criteria.
The Increasing Threat to Security
In 1985, an attacker had to have sophisticated
computer, programming, and networking knowledge
to make use of rudimentary tools and basic attacks.
As time went on, and attackers' tools improved,
Introducing Frame Relay
Large enterprises, governments, ISPs, and
small businesses use Frame Relay, primarily
because of its price and flexibility.
Frame Relay reduces network costs by using less
equipment, less complexity, and an eas
Introduction to Serial Communication
With a serial connection, information is sent
across one wire, one data bit at a time.
In reality, it is often the case that serial links
can be clocked considerably faster than