CIS246 Course Discussions Week 2


CIS246 Course Discussions Week 2
What environmental factors would you commonly take into account when choosing which media…

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CIS246 Course Discussions Week 2

CIS246 Course Discussions Week 2

All Students Posts – 51 Pages 

Transmission Basics – 28 Pages 

The lecture covers several standards. Which ones are most common? Which ones are more or less obsolete? What can you find out about the future of transmission and media types? What is happening with 10 Gbps? What about 100 Gbps? What environmental factors would you commonly take into account when choosing which media to implement in a given situation?
Most common transmission media today is fiber optics and the many variables of twisted pair copper cable. When discussing environmental factors everything is in risk mitigation. What I mean by this is that you really wouldn’t connect two routers together with copper cable, the amount of data and the speed required to have a good network just isn’t there with copper cable, thus you would use fiber optics. Then we discuss copper cable or twisted pair as it is most commonly know these days; coax is more for just your cable TV these days. So for twisted pair you have to know where the cable is being placed, do you need plenum cable or not. If you are running cable through the floor or wall then it is mostly required to be plenum, plenum means the space between the floor and walls and in cable terms it also means the cable is fire rated. Then you could use non-plenum cable to hook up the computer to the wall socket for connection. Are you concerned with security, then you would use shielded twisted pair and if security isn’t a large concern you can use un-shielded twisted pair. There are price challenges with each cable selection and possible training issue with the installation of a particular cable. Will CAT 5 cable suit your needs or should you purchase the CAT 6 cable. CAT 6 is certified for Gigabit networking and will show better performance within longer distances…

Networking Hardware and Topologies – 23 Pages 

Let’s figure out what kind of networking equipment an organization would need to buy. You can make assumptions on size and budget. What do we need to purchase? Why do we need to purchase it? That is, what will it do for us? How do we hook them together? That is, how do we cable them (or not cable them) together? Why is there such a big difference in price with the brands? How do network topologies figure into our selections and designs? Hubs were used frequently in the 1980s. Why don’t we incorporate hubs into our networks as much anymore? Can you name some additional network devices or cabling that have become obsolete? Why is that the case?
I believe that the reason hubs have become obsolete is because the switch box does more or less the same thing, but is actually faster at doing it. This is because with a hub, every device connected will always be communicating to every other device connected simultaneously. This creates a lot of unneeded traffic that slows down the overall process of data. The switch box, on the other hand, sends data directly between the devices that are involved with the exchange. This switch box is superior in speed and by relation it is also superior in security/privacy. As for obsolete cabling, the very first thing that comes to mind is the phone line. The telephone poles, as we still call them, seem to have just about everything BUT telephone lines on them now days. I believe this is because companies such as Verizon have actually integrated the internet, cable, and phone transmissions all into the same line. It’s not until these lines enter the individual house that they are divided into their respective functions…