IFSM 370 7980 Telecommunications in Information Systems Week 3 Discussion
Available: Monday, November 5, 2018 12:00 AM EST – Monday, November 12, 2018 12:15 AM EST.
There are three questions that need to be answered in the Week 3 Discussion. Please create a new thread for each discussion topic:
1. Describe the functions of a hub, bridge, switch, and router. Discuss the differences between the devices.
2. Describe a LAN, MAN, and WAN. Discuss the pros/cons of each and differences.
3. What is the difference between Wi-Fi and cellular? When would you use one versus the other?
In a network, the hub is devices in which a data packet is from one port to all other configured ports in a PC network. With data passing through the hub, it transmits data packets to a network destination. Unlike other data transmission devices, hub is used in low data transmission zones (Voellmy, 2011).
For Bridge, it searches for the destination of the data packet prior to delivery. With a combination of incoming and outgoing ports, a bridge decides if the message in the data packets will be delivered.
A network switch determines which computer will receive a given data packet. Switches increase efficiency in network transmission as only the destined PC will be using the network (Voellmy, 2011). Unlike the hub and bridge, switches can connect many devices in the same subnets.
Routers are used to connect multiple networks using layer 3-IP packets. Wireless routers use random access points outdoing hub, bridge and switch.
LAN (Local Area Network) is a high-speed connection network where computers are connected. LAN is preferred by institutions because it’s relatively inexpensive and fast. However, LAN may be inefficient when connected to many devices using heavy connections.
MAN (Metropolitan Area Network) is a large network connection covering multiple beings in a neighborhood, city or town. Although its relatively high-speed network, LAN may expose personal devices to malware and computer virus Venkataraman, 2006). An example of MAN used in towns or municipalities is the IUB.
WAN (Wide Area Network) is a type of MAN (Metropolitan Area Network) with no boundaries. Although it can be used over a large area, it can be confined by the network wavelength making devices in far places from the central access points slow. It may also pre-dispose personal computers to malware. Despite being a high-speed technology network, WAN is relatively expensive compared to LAN and MAN.
WIFI enabled network means that devices can pick the network and use the internet when there is a wireless signal. On the other hand, Cellular means that despite the availability of the wireless network, one must attach the cellular network for the devices to work (Bennis, 2013). Therefore, in cases where the wireless network is not available, then the cellular network can be used to get online using the personal devices. For the cellular network, varying forms of the package are offered with different monthly rates making the owners choose the most appropriate for their devices.
In cases where WIFI network fails due to network poor service provision, then the cellular network can be used without the need for having a sim card.
Bennis, Mehdi, et al. “When cellular meets WIFI in wireless small cell networks.” IEEE communications magazine 51.6 (2013): 44-50.
Venkataraman, Srinivasan, et al. “Protocol stack for linking storage area networks over an existing LAN, MAN, or WAN.” U.S. Patent No. 7,020,715. 28 Mar. 2006.
Voellmy, Andreas, and Paul Hudak. “Nettle: Taking the sting out of programming network routers.” International Symposium on Practical Aspects of Declarative Languages. Springer, Berlin, Heidelberg, 2011.