Network Model and Topologies for Blue Sky Optical

Running head: BLUE SKY OPTICAL 1
Tasks
1. What network model would be the best choice for Blue Sky Optical? Compare and
contrast three networking topographies discussing the advantages and
disadvantages of each.
Blue Sky Optical should adopt Internet-model where all types of communication are
made with the help of internet. This model has four layers divided into Application layer,
Transport layer, Internet Layer and Link Layer. In this model, there is no need for any
other channel of communication.
Different topologies in this channel are -

Running head: BLUE SKY OPTICAL 2
Star-Topology:
Considering Blue Sky Optical, Star topology can be selected for the network topography.
In this topology, all nodes of the network are individually linked to a central connection
point i.e. switch or a hub in relation with the Local Area Network (LAN). In this
topology, more numbers of cables are used which gives an advantage like, only one node
will not work of a cable fails.
Benefits of Star-topology:
1. It is very easy to mount.
2. One can diagnose the fault easily and so respective part can be fixed or removed.
3. The network will neither go up or down (ping stability) while the connecting or removing
devices.
Disadvantages of star-topology:
1. The cable length is long as compared to other topology.
2. It is costlier than the linear bus topology due to the cost involved relating to the network
switches.
Ring Topology:
In this type of topology, all the devices are linked in a ring formation for the purpose of
interaction and communication. In addition, there is lot of overhead traffic in this
topology due to the flowing of the data through all the respective hosts. Also, all the
devices including computers are linked with a single channel of communication and so if
there is any break at any plug of the cable, all the communication will be dropped. The
ring topology also enables enable the data to flow from node to node and every node of
the stream will handle every packet.

Running head: BLUE SKY OPTICAL 3
Benefits of Ring topology:
1. The packet collisions will be reduced as all the data flow in the one direction.
2. There is no need for a network server to regulate the connectivity of each workstation.
3. There will be high speed in the transferring of data at workstations.
Disadvantages:
1. The flow of the data is slow as it is compulsory to stream all the data with each
workstation on the network.
2. A shutdown in any one workstation will affect the entire network.
Bus Topology:
A single cable make connect every computer and network in this type of topology. A
coaxial cable is necessary for making the devices together and it is also based on the type
of network card used by every computer device in this topology.
Benefits of Bus topology:
1. This topology can be used in small networks.
2. In assembling of linear fashion, this network topology can be the very easiest method.
3. The length of cable is also less in this topology.
Disadvantages of Bus topology:
1. The real cause if hard to find out if the network goes down.
2. It is also difficult to handle troubleshooting in the individual device issues.
3. For large networks, this topology has been failed.
4. Bus topology is not great for large networks.
5. On both sides of the main cables, necessary terminators are required.