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Implementation of EIGRP

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					 Implementation of EIGRP in BZU


        Master Thesis
             By:
       Kainat Qureshi

          MIT 09-35

       Supervised by:
       DR. Maruf Pasha

Department of Information Technology

Bahauddin Zakariya University, Multan

              Pakistan.
                           Objective:

Configuration & Implentation of EIGRP in BZU to improve its
           existing infrastructure of networking.
TABLE OF CONTENTS




What is Network ?
Network :
A network is a set of devices or nodes connected by communication links.A node
can be a computer, printer or any other device capable of sending and receiving
data generated by other nodes on the network.

Most network use distributed processing, in which a task is divided among
multiple computers.

Network criteria:
A network must be able to meet a certain number of criteria, the most important
of these are performance, reliability and security.

Performance:
Performance can be measured in many ways, including transmit time and
response time. Transmit time is the amount of time required for a message to
travel from one device to another. Response time is a elapsed time between an
inquiry and a response.

Performance is often evaluated by two networking metrics: throughput and
delay.we often need more throughput and less delay.

Reliability:
Network reliability is measured by the frequency of failure, the time it takes a link
to recover from a failure, and network’s robustness in a catastrophe.

Security:
Network security issues include protecting data from unauthorized access,
protecting data from damage, and implementing policies and procedures for
recovery from breaches and data losses.
Topology
There are different types of network topologies, If we are to design a network
and we do not know how a network is laid out or how the devices
Communicate on that network; it is extremely difficult for us to protect that
network. We define physical and logical topology and discuss the various
types that exist in each category.


Physical Topology :

A term physical topology is refers to the way in which network is laid
out physically. The topology of a network is geometric representation
of the relationship of all the links and linking deices to one another.

There are four basic topologies possible.

      Mesh
      Star
      Bus
      Ring


Mesh :
In a mesh topology every devices has a dedicated point-to-point link to
every other device. The term dedicated means that the link carries
traffic only between two devices it connects. The use of dedicated links
guarantees that each connection can carry its own data load, thus
eliminating the traffic problems than can occur when links must be
shared by multiple devices.
Advantages:
     Secure
     Very complex
     Extremely fault tolerance

Disadvantages:
     Expensive
     Difficult to administer
     Difficult to troubleshoot
     Difficult to implement


Star topology :
In stat topology each device has a dedicated point-to-point link only to
a central controller, usually called hub. The devices are not directly
linked to each other. Unlike mesh topology, a star topology does not
allow direct traffic between devices. The controller acts as an exchange:
if one device wants to send data to another device, it sends data to the
controller, which then relays the data to the other connected device.
A star topology is less expensive than a mesh topology. In star each
device needs only one link and one i/o port to connect it to any number
of others.




Advantages:
     Easy to install
     Easier to troubleshoot
     Widely used
     Centralized management
     Easy to add devices to network
     One break does not bring whole network down

Disadvantages:
   If you have only one central device and it fails, it brings the network down
   Costs are usually higher than with bus or ring networks
Bus :
A bus topology is multi-point. One long cable acts as a backbone to link
all the devices in a network. Nodes are connected to the bus cable by
drop lines and taps. A drop line is a connection running between the
device and the main cable. A tap is a connector that either splices into
the main cable or punctures the sheathing of a cable to create a contact
with the metallic core. As a signals travels along the backbone, some of
its energy is transformed into heat. Therefore, it becomes weaker and
weaker as it travels farther and farther. For this reason there is a limit
on the number of taps a bus can support and on the distance between
those taps.




Advantages:
     Easy to install
   Easy to add new systems to network
   Great for small networks
Disadvantages:
   If cable breaks whole network is down
   Out-of-date technology
   Can be difficult to troubleshoot




Ring :
In ring topology, each device has a dedicated point- to-point connection
with only the two devices on either side of it. A signal is passed along
the ring in one direction, frm device to device, until it reaches its
destination. Each device in a ring incorporates a repeater. When a
device receives a signal intended for another device, its repeater
regenerates the bits and passes them along .

A ring is relatively easy to install and reconfigure. Each device is linked
to only its immediate neighbors. To add or delete a device requires
changing only two connections.
Advantage:

   Great for small networks
   Easy to install
Disadvantages:

   Unmanageable in a large network
     Out-of-date technology
     network Can be difficult to troubleshoot




Catagories of network:
Today when we speak a network , we are generally referring to two
primary categories: Local area networks and Wide area networks. The
category into which a network is falls is determined by its size. A LAN
covers small area and WAN can be world wide. Network of a size in
between are normally referred to as metropolitan area networks and
span tens of miles.
Local area network:
A local area network is usually privately owned and links the evices in a single
office, building or campus. Depending on the needs of an organization and the
types of technology used, a LAN can be as simple as two PCs and a printer in
someones home office; or it can extend throughout a company and include audio
and video peripherals. currently LAN size is limited to a few kilometers.

LAN’s are designed to allow resources to be shared between personal computers
or workstations. The resources to be shared can include hardware (e.g a printer) ,
a software (e.g an application program), or data.

Wide area network:
A wide area network provides long distance transmission of data image, audio
and video information over large geographic area that may comprise a country, a
continent, or even the whole world. A WAN can be as complex as the backbone
that connect the internet or as simple as a dial up line that connects a home
computer to internet.

METROPOLITAN AREA NETWORK:
A MAN is a network with a size between the LAN and a WAN. It normally covers
the area inside the town or a city. It is designed for customers who need a high
speed connectivity, normally to the internet.

A good example of MAN is the part of telephone company network that can
provide a high speed DSL line to customers. Another example is tv cable network.

				
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