NTC 362 Week 3 DQs
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This 6 page Study Guide was uploaded by an elite notetaker on Wednesday November 11, 2015. The Study Guide belongs to fin571 at Kaplan University taught by in Fall 2015. Since its upload, it has received 28 views.
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Date Created: 11/11/15
Week 3 DQ 1 Answer by Day 3 Write a 200 word response to the following questions: ∙ What is a packet? What is packet switching? ∙ How would you explain the concept of packet switching? ∙ What are the advantages and disadvantages of packet switching over circuit switching? Answer: What is a packet? A packet is on of the most common ways that information is sent of the web or from node to node communications. A packet is divided into three main sections they are: Header Payload Footer The Packet header carries the all infomation about the data contained in the payload. The header also holds information on the length of the packet, packet number, the source IP and destination IP. The payload is exactly like it sounds it contains all the data within that packet for example if you where sending a email with a photo then it would contain the photo data and everything related to it. The footer contains the information the lets the destination IP or computer that the packet has ended and no more information will be received. Though this is a very basic outline of a packet there is a lot more to packets then a lot of people realize. With TCP/IP packets the information that is contains the digital finger print of you system called a MAC address and IP of your system. Without going to deep into this it is very important to remember that what ever you do on a computer can be tracked and this is all thanks to the "Packet". What is packet switching? Packet switching is almost like packet fragmentation, but is a lot different for the purpose of its use. Packet switching is when a packet is send over the wire, but it is split up into multiple separate sections. These sections do not have to take the same path to the final destination, because with in the packet as you recall from what was stated before contains all the information of the destination IP. This means that even though the packet has be split in to multiple sections and each section is taking a different route, they all end up at the same place. This is the same way that ATM operates or Asynchronous Transfer Mode works. How would you explain the concept of packet switching? The whole concept behind this idea was to provide the best mare to do more with less. I know this may sound a little crazy but packet switching allows multi tasking to take place on the wire. This means that packet switching allowed the ability to route multiple communication packets over the same network wire at a much lower over head, which allowed for more flexibility and throughput on a network. What are the advantages and disadvantages of packet switching over circuit switching? The following are advantages of Packet switching: Takes full advantage of the bandwidth available provides security is not affected if there is a line outage The following are disadvantages of Packet switching: Once the packet is sent the data can get lost in transfer and become corrupt. Not the best for streaming media When under heavy use it can create a bottle neck which can cause delays The following are advantages of circuit switching: Once in use the circuit is dedicated to that call only will always use full bandwidth best quality of service The following are disadvantages of circuit switching: Takes a long time to setup in regards to the circuit Was created only for Voice traffic, but can support data however this was not what it was designed for When diasters hit the network can crash due to high volume Week 3 DQ 2 How would you describe "what is the internet?" How does it works? What makes the internet the same/different (technology wise) from other packet networks? (You may need to do additional research on different WAN technologies) What's the difference between the internet and the world wide web? Answer: How would you describe "what is the internet?" I think that the easiest way to look at the internet is the fact that it is the worlds biggest library of data and information. The best thing about this is that if you are connected then you are already have access to this somewhat free information. I say that it is some what free because you still have to pay the internet service providers for the link and some sites also have charges that apply to them based on what you are trying to do. The internet provides an one stop shop opportunity because if you can think it, want to see it, or want to buy it the chances are that it is out there on the web you just have to find it first. How does it work? The internet is the worlds biggest plug and play network. The fact that once you have access you do not have to do any fancy background checks all you do is plug your system in and you on. The internet of today is so massive that it is also running out of IP addresses. The current version of IPv4 is soon going away and IPv6 is taking over. However there is a lot of issues that are going to have to be taken care of before this is rolled out. The other thing that is really cool about the net is the fact that there is so much technology that is involved behind the scenes that retrieve the information that user look for that a lot of us really do not even think about it. What makes the internet the same/different (technology wise) from other packet networks? The internet is the largest meshed network. I say this because their are so many networks that are a part of the internet. Now if you are having issues with how it is responding then you cannot just pick up the phone and call the helpdesk to help make the internet go faster, this is just something that cannot be fixed. Now if there is an issue with the service provider than by all mean they can try to trouble shoot the issue. The internet has a mass amount of traffic going through it every second that it is almost impossible to measure. I would have to say that the internet has every flavor of networks on it because everything at some point is connected to it in some way and somehow. What's the difference between the internet and the World Wide Web? The differance is between the two is the fact that the internet uses the world wide web as an application to access other sites on the web. One way to look at it is a computer is the internet and the programs that it uses in the world wide web. they are not the same thing and this is something that a lot of people fail to realize. Week 3 DQ 3 Access this week’s Electronic Reserve Readings and select a peerreviewed article on basic network topologies. You may supplement with material from other sources, but you must have at least one peerreviewed article. Remember to cite your sources. Write a 200 word response to the following questions: Select one of the types of network processors such as hubs, switches, routers, and gateways? ∙ What are the advantages and disadvantages of your selection? ∙ What type of media is typically used for connectivity? ∙ What are the performance specs in terms of reliability, speed capabilities, and nominal distance for reliable spans with the typical media? ∙ Provide an example of how the selected network processor is used in the network. The network device that I did my write up on is the hub. There are two types of hubs that can be bought they are the 10baseT and the 100baseTX. This is a device that operates in data link layer of the OSI model. These devices may not be that smartest, but they are fairly reliable when it comes to doing there job. The hub has the ability to extend a network by providing network services to new system on a network. The following are some of the advantages that a hub provides: ∙ Cost ∙ Shared internet access ∙ Backward Compatibility The cost is a big factor due to the fact that most hubs only cost about $30. This is significantly less when compared to a lot of routers and switches available. The shared internet access is just as it sounds a hub can give multiple computers the ability to share a single internet connect without the cost of any expensive equipment or additional services. The great thing that a hub also provides is the fact that mostly anything can be connected to it, making network expansion very simple. One of the best factors is that, “a hub is the cheapest and easiest way to connect some types of older network devices, specifically those that only support 10BASE2 ports, to a modern network.” (Powers, 2010). This can provide a major benefit to any network administrator. Some of the disadvantages of a hub are: ∙ Performance ∙ halfduplex ∙ nonintelligent device One of the major disadvantages of a hub is the performance that it provides. The two main types are 10baseT and the 100baseTX. “The 10baseT only supports speeds of up to 10Mbps and the 100baseTX is a little bit faster with speeds of 100Mbps” (Meyer Computer & Consulting, 2009). Now these speeds may seem faster, but the more network nodes that are connected the less bandwidth is left for the rest of the other devices Another problem that hubs have is that they only operate in half duplex mode. This means that when a computer is connected to a hub it can only send data when it is not receiving it. The last disadvantage that will be covered is that the hub is a nonintelligent device. This means that it only passes on data packets and cannot route them. This may not be a problem for a smaller home network, but this can cause havoc when it comes to the bigger LANs. References Meyer Computer & Consulting. (2009, March 03). The difference between hubs and switches. Retrieved,, from http://www.meyercomputer.net/ArticleHubs&Switches.htm Powers, D. (2010). Advantages of network hubs. Retrieved, , from http://www.ehow.com/facts_4969407_advantagesnetworkhubs.html
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