Page 80 - DCAP104_EXPOSURE_TO_COMPUTER_DISCPLINES

Unit 4: Introduction of Networks

Notes
ongoing research on security solutions to create timely, actionable research services and
simultaneously used its ongoing contacts with end-users to help our client address new
markets. The Frost & Sullivan Network Security team was able to tap into the existing
knowledge base to immediately analyze the different metrics and trends that would
impact our client.
The Solution: The information in the subscription was leveraged to develop
recommendations for market entrance strategies. The Frost & Sullivan team conducted
interviews with a number of large end-users to determine where they were experiencing
difficulties with their server security posture. Frost & Sullivan provided the client with
analysis of the addressable market and then set up meetings for the client with potential
end-users and partners, such as Rackspace and Nokia. Finally, Frost & Sullivan identified
holes in the client’s sales strategy and provided the client with sales training to improve
its employee’s ineffective techniques and establish ones that would be more effective.
Questions:

1. What kind of challenge they have to phase during securing network?
2. Explain the Solution.

Ethernet as it is defined by IEEE 802 utilizes various standards and mediums that enable
communication between devices. Frequently deployed devices include hubs, switches,
bridges or routers. Wireless LAN technology is designed to connect devices without wiring.
These devices use radio waves or infrared signals as a transmission medium. ITU-T G.hn
technology uses existing home wiring (coaxial cable, phone lines and power lines) to create
a high-speed (up to 1 Gigabit/s) local area network.

4.3.13.2 Wired Technologies
 Twisted pair wire is the most widely used medium for telecommunication. Twisted-
pair cabling consist of copper wires that are twisted into pairs. Ordinary telephone
wires consist of two insulated copper wires twisted into pairs. Computer networking
cabling consist of 4 pairs of copper cabling that can be utilized for both voice and
data transmission. The use of two wires twisted together helps to reduce crosstalk
and electromagnetic induction. The transmission speed ranges from 2 million bits per
second to 100 million bits per second. Twisted pair cabling comes in two forms which
are Unshielded Twisted Pair (UTP) and Shielded twisted-pair (STP) which are rated in
categories which are manufactured in different increments for various scenarios.
 Coaxial cable is widely used for cable television systems, office buildings, and other work-
sites for local area networks. The cables consist of copper or aluminum wire wrapped
with insulating layer typically of a flexible material with a high dielectric constant, all
of which are surrounded by a conductive layer. The layers of insulation help minimize
interference and distortion. Transmission speed range from 200 million to more than
500 million bits per second.
 Optical fiber cable consists of one or more filaments of glass fiber wrapped in
protective layers that carries a data by means of pulses of light. It transmits light
which can travel over extended distances. Fiber-optic cables are not affected
by electromagnetic radiation. Transmission speed may reach trillions of bits
per second. The transmission speed of fiber optics is hundreds of times faster
than for coaxial cables and thousands of times faster than a twisted-pair wire.
A recent innovation in fiber-optic cable is the use of colored light. Instead of carrying
one message in a stream of white light impulses, this technology can carry multiple
signals in a single strand.

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