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MCSE Guide
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MCSE : Security Specialist
GET
CERTIFIED IN JUST 18 DAYS - 2003 PATH
Our MCSE 2003: Security+ Program:
- Allows you to achieve your certifications in a fraction of the
time of 'traditional training' while delivering industry-leading
exam passing percentages
- Helps students grasp complex technical concepts more easily by
identifying and catering to individual student learning styles
through a mixed visual, auditory and kinesthetic-tactual delivery
system
- Enhances retention by employing accelerated learning techniques
focused on committing information to long-term memory
-
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Edmonton.
Repeaters
Repeaters receive signals and retransmit them at their original
strength and definition. This increases the practical length of
a cable. (If a cable is very long, the signal weakens and
becomes unrecognizable.) Installing a repeater between cable
segments enables signals to travel farther. Repeaters do not
translate or filter signals. For a repeater to work, both
segments connected to the repeater must use the same access
method. For example, a repeater cannot translate an Ethernet
packet into a token ring packet. Repeaters do not act as filters
to restrict the flow of problem traffic. Repeaters send every
bit of data from one cable segment to another, even if the data
consists of malformed packets or packets not destined for a
computer on another segment.
Use a repeater to:
-
Connect two segments of similar or dissimilar cabling.
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Regenerate the signal to increase the distance transmitted.
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Transmit all traffic in both directions.
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Connect two segments in the most cost-effective manner.
Hubs
Hubs are connectivity devices that connect computers in a star
topology. Hubs contain multiple ports for connecting to network
components. If you use a hub, a break in the network does not
affect the entire network; only the segment and the computer
attached to that segment fail. A single data packet sent through
a hub goes to all connected computers.
There are two types of hubs:
-
Passive Hubs.
Send the incoming signal directly through their ports
without any signal processing. These hubs are usually wiring
panels.
-
Active Hubs.
Sometimes called
multiport repeaters,
receive incoming signals, process the signals, and
retransmit them at their original strengths and definitions
to the connected computers or components.
Use a hub to:
-
Easily change and expand wiring systems.
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Use different ports to accommodate a variety of cable types.
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Enable central monitoring of network activity and traffic.
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