Data Communications [Author Name(s), First M. Last, Omit Titles and Degrees] [Institutional Affiliation(s)]

Data Communications

[Author Name(s), First M. Last, Omit Titles and Degrees]

[Institutional Affiliation(s)]

Author Note

[Include any grant/funding information and a complete correspondence address.]

Question one

Due to the increasing network traffic which has been brought about by the increased demand of the internet, there has been the need to develop standards for high speedspecifications. The 802.11 is used by the IEEE to refer to set of Physical Layer (PHL) and Media Access Control (MAC) specifications that are used to implement Wireless Local Network (WLAN)(Keshav, 2013).  The WiGig network Standard was developed to aid in carrying out research in the 802.11ad operations that operate in using the Giga Hertz frequency bandwidth. The factors which contribute WLAN market growth are:

  • Multimedia sharing and streaming
  • The increase in adoption of WLAN in Enterprises.
  • The Integration of WLAN into more consumer products such as smartphones, e-readers, gaming consoles and etc.
  • Increase in applications, i.e. the internet of things, such as home automation, smart meters, and etc.
  • Increase in the use of WLAN to offload data from cellular networks. (Keshav, 2013), Say that 65% of mobile data traffic can be offloaded to WIFI.
Network Technology Speed DSSS or OFDM Kinds and Number of antennas Bandwidth
802.11a 54 Mbps DSSS Has a total of 23 channels and 4 antennae’s 5.75 GHz
802.11b 11 Mbps DSSS Supports MIMO antennas where it supports 3 kinds of antennae 2.4-2.5 GHz
802.11g 54 Mbps Allows up to 4 different kinds of antenna to be supported. 20 MHz
802.11n 150 Mbps OFDM Multiple Input, Multiple Output antennae (MIMO). 4 antennae that can handle up to 4 simultaneous data streams. 20.40 MHz
802.11ac 866.7 Mbps 4.0/3.6us Multiple Input, Multiple Output antennae of up to 8 multi-user with a high density modulation 160MHz
802.11ad (WiGig) 6.75 Gbps DSSS Multiple Input, Multiple Output antennae that supports up to 4 users. The High gain antennae’s can be used for P2P wireless backhaul. 2.16 MHz
802.11ax 10Gbps OFDM Allows up to 4 special streams of MIMO 20, 40, 80, 160 MHz

802.11ac: it was designed to mitigate against interferences caused by overlapping frequencies in other classes in this category.

802.11n: This is the fastest standard that is currently available in the market. It can give maximum speeds of between 150 Mbps and 300 Mbps.


Question two

I would recommend that the family thinks on the second option which is to install one WIFI access point and put WIFI cards in the three laptops despite it being an expensive undertaking. This is because of the following reasons:

  • WLAN network is easy to configure than a cables LAN network(Keshav, 2013). This is because, for the WLAN network they will only need to set up the router and put the Network Interface Cards in the computers then thy will be good to go. In a cabled LAN, they will need to run cables through their houses to the locations where the computers are located and this can be tedious considering it’s a storied building.
  • A WLAN network would also be appropriate because in can support extra computers in case they decide to increase the number of computers in the building. This is because one can be able to access a WLAN network if they have the WIFI Cards.
  • A WLAN network can be secured by a WPA2 passwords thus restricting outsiders from accessing the network. A cabled LAN cannot be secured.
  • A WLAN network is easy to troubleshoot as compared to the cabled LAN, as the cables could contribute to some of the problems.
  • WLAN network allows voice and data services over the same medium.

Question three

  1. Core technology design

The core network design that I would recommend for the company’s network is a Wired Local Area Network with a mesh topology connecting the different servers in the company. A wired LAN supports high speed transmission of data in the organization. The transmission speeds are not affected by the number of connections. Despite the high speed network transmission capacities offered, it also guarantees network security.

In case of a WIFI network design, hackers would be tempted to hack into the company’s network because they can access it and be able to manipulate figures in an attempt to get the security keys of the company.

The reason I’d recommend for a meshed topography in the network design is because of the reason that it allows faster communications to take place due to point to dedicated point to point communications between the servers that will be allowed. A mashed network technology also allows transfer of big data, i.e. they support large data transfers to take place. This is due to the fact that the point to point connections between the servers will allow data transfers to take place without interferences. It would also allow privacy of data when sending and receiving data from another department as the channels are dedicated, thus no department will be able to read data intended for another department.

  1. Specific LAN technologies to be used in each department

The specific network technology that I would recommend to be used in each department is the Fiber Distributed Data Interface FDDI technology. This is because FDDI network technology combines the advantages of both the token ring technology and the Ethernet technology(Keshav, 2013). With the network traffic from the three departments, there is need to have a technology that will be able to address the needs of those departments and these can be solved by the FDDI network technology.

The FDDI technology can support speeds of up to 100 Mb. It is designed to use the same token ring technology that was designed by IBM, but its difference comes in the sense that it has two rings, i.e. the primary ring and the secondary ring.  The primary ring is used for transferring the data while the secondary ring is used for backup services in case the primary data gets lost on the way or collides with other data packets. The FDDI ring has two options of attaching different stations, i.e. the Single Attachment Station (SAS) or class A and the Dual Attachment Station (DAS) or class B.

Department X can be configured as a DAS because it reads and writes data from the department Y and Z. this will help to reduce the network traffic in the three departments because of the high speeds supported and the data transfer mechanisms supported. The mechanism supported by this technology of making sure that data does not get lost on the way and communication can take part from any direction.

The advantages that FDDI comes with are:

  • It supports high speeds in the network.
  1. Design solution to address the departmental traffic issues.

In order to address the departmental traffic issues, I would recommend the following strategies to be adopted as measures to reduce traffic on the network.

  1. Implement a start network topology in each department: A start network topology would assist in controlling traffic in then department as it would ensure that each individual in the department has an equal opportunity of sending and receiving data. The token ring mechanism allows the computer that has been assigned the ring to send and receive data without being interfered with data from other computer that might be sending data at that time. This mechanism will also ensure that data collision issues are avoided as the no computers will be allowed to send data at the same time.
  2. Introduce an Intelligent Hub to monitor traffic in each departments: Having an intelligent hub in each departments willnot only aid in managing the cables but also managing traffic issues which might result from high number of data sent through the network. An intelligent hub does network management such as redirecting the data packets to the destination computers and also regenerating data signals so that they can be able to reach their destination in the other departments.
  • Have a router connect the three departments together: A router is a networking device that connects more than two network signals and filters traffic between the networks so as to ensure that there is smooth flow of data. Having a router to connect the three departments will ensure that there is smooth flow of data as the router is able to direct redirect the packets to their destination.

The router that I’d recommend to be used in designing the company’s network is a dynamic router. This is because a dynamic router is able to update the routing table from the data it receives from the communicating devices. The routing table enables the router to direct data packets to the communicating computers thus ensure that data collision does not occur. This routing able will be useful in redirecting data packets that are sent from one department to another by using the routing algorithm that gets its data from the network addresses and the router addresses. The advantages that come with using a router are: It will be able to connect the departments even if different physical media are used, it can be able to choose the best data path for data packets to travel and lastly is that it will be able to reduce the network traffic by not forwarding data packets when there is traffic.

  1. Use fiber optic cables as the physical mediums to interconnect the departments: Fiber Optic cables offer high speed network speeds which thus thy will aid in addressing the issue on network traffic. Despite the fact that these cables are expensive, they offer better service as they are not affected by traffic issues(Keshav, 2013). This is because they have a high bandwidths which allows more data to flow through them. The fiber optic cables will also allow continuous flow of data which is not affected by electromagnetic waves.
  2. Have a network manager to manage network problems. Having a network manager in the company will help in managing the network issues as he/she will be able to deal with the problems that come along as people use the network.


Keshav, S., 2013. An Engineering Approach to Computer Networking: ATM Networks, the Internet, and the Telephone Network. illustrated ed. Boston: Addison-Wesley.


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