...Two backbone configurations could be Cable Modems and a FIOS. It is used for transmission or receipt over cable television lines, and is is used primarily for connecting to the Internet. A cable modem converts analog data signals to digital form and vice versa to transmit signals over cable lines much faster, and it is not to be confused with a telephone modem. Transmission rates average around 1.5 mbit/s. Because cable is shared among multiple tenants, connection is usually slower during the hours most users are on the internet. Faster transmission is actually possible, but in addition to shared overload, speed can usually be restricted by the cable company’s connection to the Internet. Cable Internet access is competitive with DSL. * PROS: Fast for the value * CONS: Initial cost and limitations of available locations. FiOS FiOS stands for Fiber Optic Service that connects to the Internet using light over an optical network. In your home, you still connect your computer through copper wiring. The advantage of FiOS is that it can provide higher speeds than traditional copper wire connections such as DSL or cable. Some Internet providers offer multiple options, depending on the area you are in. More populated areas are more likely to have FiOS available. Check with your phone company or Internet provider for more information. * PROS: operates at speed of light * CONS: limited to one provider (Verizon) and not available in all areas Of course, a lot depends...
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...Chapter 1 R4. List six access technologies. Classify each one as home access, enterprise access, or wide-area wireless access. * For Home access we can use the following access technologies: 1. Dial-up modem over telephone line 2. DSL over telephone line: residential or small office In locations where DSL, cable, and FTTH are not available (e.g., in some rural settings), a satellite link can be used to connect a residence to the Internet at speeds of more than 1 Mbps; StarBand and HughesNet are two such satellite access providers. Dial-up access over traditional phone lines is based on the same model as DSL—a home modem connects over a phone line to a modem in the ISP. Compared with DSL and other broadband access networks, dial-up access is excruciatingly slow at 56 kbps. 3. Cable to HFC: residential; While DSL makes use of the telco’s existing local telephone infrastructure, cable Internet access makes use of the cable television company’s existing cable television infrastructure. A residence obtains cable Internet access from the same company that provides its cable television. Each neighborhood junction typically supports 500 to 5,000 homes. Because both fiber and coaxial cable are employed in this system, it is often referred to as hybrid fiber coax (HFC). * For use at firms or enterprise access 4. 100 Mbps switched Etherent Ethernet is by far the most prevalent access technology in corporate, university, and home networks. The Ethernet switch, or a network...
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...Porter's Five Forces Supplier Power: Here you assess how easy it is for suppliers to drive up prices. This is driven by the number of suppliers of each key input, the uniqueness of their product or service, their strength and control over you, the cost of switching from one to another, and so on. The fewer the supplier choices you have, and the more you need suppliers' help, the more powerful your suppliers are. Buyer Power: Here you ask yourself how easy it is for buyers to drive prices down. Again, this is driven by the number of buyers, the importance of each individual buyer to your business, the cost to them of switching from your products and services to those of someone else, and so on. If you deal with few, powerful buyers, then they are often able to dictate terms to you. Competitive Rivalry: What is important here is the number and capability of your competitors. If you have many competitors, and they offer equally attractive products and services, then you'll most likely have little power in the situation, because suppliers and buyers will go elsewhere if they don't get a good deal from you. On the other hand, if no-one else can do what you do, then you can often have tremendous strength. Threat of Substitution: This is affected by the ability of your customers to find a different way of doing what you do - for example, if you supply a unique software product that automates an important process, people may substitute by doing the process manually or by outsourcing...
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...devices as secure as possible. I choose the network layout workgroup. First with the workstations and laptops you need to shut down the unneeded services or programs or even uninstall them. I would also have installed reputable anti-virus software on the workstations. You also need a hardened image for all of your workstations. To do this you need to install a new copy of the operating system and then begin the process of hardening it. After you have one good hardened workstation you can use it as a model for all other workstations and laptops. As for the router you definitely need to protect it from unauthorized access. The router needs to be password protected and you should periodically change that password for added protection. For the cable modem you should keep all unwanted and unused ports closed. I would also schedule a regular scan of all the systems as part of my maintenance processes. These processes and procedures apply for all hardware devices. Disable remote administration, administration of your router / access point should be "local only", namely, there is no reason to let people from another country have access to your network hardware and If you need to make changes, you should be local to the device. Update the firmware. Believe it or not, consumer network hardware needs to be patched also. Check the support site of the vendor of the device when you get it and check for an update. Sign up for e-mail alerts for updates, if available, or check back on a regular basis...
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...Services in Your Area CIS 505 Communication Technology Professor: Strayer University Abstract This paper describes the different high speed internet providers in my community, such as DSL and Cable services. 1. Identify the Digital Subscriber Line (DSL) and cable modem services reference in this assignment and the region(s) in which they operate. Both Comcast cable, which provides internet via a cable modem, and Verizon DSL, which provides service via a telephone line, service Chesterfield, Virginia. (Verizon) (Comcast) DSL requires the user to connect to the internet via a modem, which converts digital data to an analog signal so it is able to transverse across phone lines. This service provides a high speed link to the internet. (Stallings) Verizon, at the present time is slowly moving away from DSL and into FiOS (Fiber Optic Service), which is being marketed as a much faster service than the traditional DSL; this is so that Verizon can compete with cable. Verizon has stated that they are also going to be raising the rates for existing DSL users to force them into upgrading to FiOS. Comcast cable also provides a high speed cable internet service which requires a modem as well, but instead of working over telephone wires it works over the cable wires that provide television service. Both Verizon and Comcast offer Wi-Fi services, which means a customer, can connect to the internet from anywhere, and are not just limited to the home. Wi-Fi uses radio technology...
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...Cable Modem versus Digital Subscriber Line (DSL) By XXXX XXXX Devry University Professor Bonita Reed January 20, 2011 Author Note This paper was prepared for English 112, taught by Professor Reed. Abstract Unless you live or work in a remote or very rural area, you probably have the option of giving up that slow dial-up modem and investing in a broadband Internet connection. If high-speed Internet services are available, your choice is between DSL or cable modem services. Both DSL and cable modems are common home networking broadband connection technologies — but which option is better? In order to determine which is better, we need to discuss them in detail. DSL uses a technique for placing a digital data onto copper wires. Cable Modem versus Digital Subscriber Line (DSL) DSL and cable modems are common home networking broadband connection technologies but which option is better? In order to determine which is better, we need to discuss them in detail. DSL uses a technique for placing a digital data onto copper wires). What is a DSL? DSL is a high-speed internet service like cable Internet. DSL provides high-speed networking over ordinary phone lines using broad band technology. DSL is also called an always-on connection because it uses existing 2-wire copper telephone line connected to the premise and will...
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...Marcus Woods January 27, 2013 Troubleshooting the Network Interface Card * Check the cable connectors and cable. It should be 343 feet or less and contain a correct (8 pin) cable connector * Check to ensure that you are plugged into the correct NIC jack. An RJ45 will not fit into an RJ11 but an RJ11 (6 pin) will fit into an RJ45 (8 Pin) receptacle. It will be a loose fit. The RJ45 is for your network interface card .RJ11 is your modem. * Are the link lights on? * Recycle the modem hub/router. If you are running a cable modem or a DSL then you will have a separate hub or router. Disconnect the power for at least 20 seconds and then restart. * Check for error messages meaning wrong username or password then contact your ISP for the connect account settings. Check to ensure that you’re ISP did not disconnect you. * Check error messages in the Event Viewer. Start/Settings/Control Panel/.Administrative Tools/Computer Management. * Ping 127.0.0.1 this will test to ensure that your TCP/IP software is working correctly. * Ping n.n.n.n. this will test to ensure that your NIC card is working correctly. If it is not then reseat the NIC card. If problem persist and you cannot Ping the NIC card then the card is bad. * Perform an IPCONIG/RELEASE and then a IPCONFIG/RENEW in DOS to release the current IP settings and then re-assign the IP settings * Perform a Tracert to see if it will hop across the NIC. * Perform a Route...
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...told us- “a cost of $60 per month for 1.5 Mbps down and 384 Kbps up”. For the local loop, the ADSL also has a maximum distance up to 18000 feet long. Another type of DSL is called the VDSL. It has a short distance but with a high speed rate up to 51.8 Mbps. The Cable modem service is the service that runs through the TV cable with the shared multipoint circuit. The users actually will share the available capacity that the actual service giving, at the same time all data within the circuit will go to all users` computer. The DOCSIS is a dominant standard; there is no standard data rate yet. However, according to the book: “Typical downstream speeds range between 1 Mbps and 10 Mbps, and typical upstream speeds range between 256 Kbps and 1 Mbps.” (Dennis & Fitzgerald; chapter 4, 2009). And as we knew already, the capacity is shared amount those users who are using it at the same time. The last option is the Wireless DSL service. Two most common types of fixed wireless system are “Wireless DSL” & “WiMAX”. Both of them are going to need a single line-of-sight circuit between transmitters. And the wireless DSL could be point to point or multipoint. The multipoint style is considered to be a choice for both cable modem and DSL service. It also requires users to share the available capacity from the circuit. And the data transferring rate is 1.5 up to 54 Mbps according to different vendors that you choose. To me, seems the first option “DSL service” is a good choice for dear...
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...Roberts bid successfully for cable franchises in Philadelphia. After this success he decided to expand the company’s operations further and in 1972 they took the company public due to the stagnation of subscriber rates. Comcast decided to move into the telephone business in 1988 when they purchased Amcell, this was the first time a cable company was able to offer their customers telephone service from another source other than the telephone providers. Ralph Roberts named his son, Brian L. Roberts to be the next president of the company which took everyone by surprise but he turned out to be a very efficient manager. In the mid-1990s there was an increase in activity for the cable and telecommunications industries due to deregulation which brought the cable and telephone companies into competition with one another, an increase of mergers and acquisitions were seen since many companies wanted to build more efficient networks. Microsoft Corporation decided to invest one billion dollars into Comcast so they would have a cable partner that could test “ interactive television and high-speed computer services,” (Funding Universe) they decided to choose Comcast due to them having the most advanced cable systems in the country at the time. Around the same time Microsoft invested, Comcast converted to a new fiber-coaxial technology which in turn made it more efficient by improving its reliability and the overall signal quality. Comcast went to being solely a cable company to a giant in the...
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...national Motorola dealer. In 1940 Galvin Manufacturing products include Handle-Talkie used by the military in World War II. Motorola once controlled the United States market for wireless communication devices such as cellular telephones, pagers and high frequency radios. Motorola continues with sales, services and manufacturing facilities throughout the United States and international markets. The salient opportunities are Motorola’s various products that are strategically placed in each market. Motorola partnered with other companies such as Cisco Systems, Inc. to expand operations in the United Kingdom and with BT Cellnet by producing the world’s finest commercial General Park Radio Service (GPRS). Motorola introduced the wireless cable modem that allowed computer networking. The RAZR was also introduced which was a huge success and held 16 percent share of the cell phone market until 2007. Motorola introduced the MING touch screen smart phone that featured advanced handwriting software and the Chinese alphabet that targeted the Asian market. The external threat is Motorola Competitors are more dominant in the industry which is really a big threat for Motorola because this situation can be worst in the future if Motorola doesn’t try to increase...
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...Well Cathy lets take a look at your current Internet speed 56-Kbps dial up modem was the standard in the late 1990s, they were the most popular access method for personal Internet usage, but their use has declined in the developed world as broadband internet technologies such as DSL and cable internet, So currently you are using a standard that has been out of date for the last 12 years so lets look at what some of your alternatives are. DSL Digital subscriber line (DSL) is a family of point-to-point technologies designed to provide high-speed data transmission over traditional telephone lines.2 The reason for the limited capacity on traditional telephone circuits lies with the telephone and the switching equipment at the end offices. The actual cable in the local loop from a home or office to the telephone company end office is capable of providing much higher data transmission rates. So conversion from traditional telephone service (POTS) to DSL usually requires just changing the telephone equipment, not rewiring the local loop, which is what has made it so attractive. (Fitzgerald 344) Fixed Wireless The most popular types of fixed wireless are WiMax and wireless DSL, which requires a line of sight between the communicating transmitters. For this reason, wireless DSL has limited application because it requires tall buildings or towers to be effective. The most common use today is to provide Internet access to multitenant buildings such as remote office buildings, apartment...
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...1. Prepare a 200- word analysis in which you describe why Covad’s recent strategy of selling Internet access directly rather than through ISPs has been successful. 2. Use the links in the online companion for this chapter, your favorite search engine, and resources in your library to learn more about Covad and its current competitors in the cable industry primarily Cox Cable, Comcast, and TimeWarner Cable, but there are others). Prepare a report of about 600 words in which you outline and analyze the strengths and weaknesses that Covads has with respect to each of these competitors. Strengths 1. Covad’s ClearEdge Pro is a fully hosted network-based VoIP service for customers with 10 to 250 users per site. The service makes the jump to VoIP easy for small companies that have not invested in an IP-based phone system and for mid-sized companies that must connect branch offices and want to offer a consistent feature set across all locations. ClearEdge Pro is compatible with IP handsets from Cisco, Polycom, and LG, as well as traditional analog handsets. 2. Covad ClearEdge IA is premises-based solution that works with customers’ existing PBX or key telephone system to deliver unlimited local and long-distance minutes, high-speed T1 broadband, dynamic bandwidth allocation, and e-mail and Web hosting services. ClearEdge IA allows the customers to set a “Business Continuity” feature to remain available to callers during power failures, outages, or when all office lines are busy. Covad’s...
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...the circuit suffers less attenuation which means a longer distance from the station, your speed/connection suffers. Cable modem service is available for a cost of $50 per month for 1.5 Mbps down and 640 Kbps up. Cable modem architecture is very similar to DSL—with one very important difference. DSL is a point-to-point technology whereas cable modems use shared multipoint circuits. With cable modems, each user must compete with other users for the available capacity. Furthermore, because the cable circuit is a multipoint circuit, all messages on the circuit goes to all computers on the circuit Wireless DSL is available in her apartment building for $45 per month for 1.5 Mbps down and 256 Kbps up. Wireless DSL, which requires a line of sight between the communicating transmitters. For this reason, wireless DSL has limited application because it requires tall buildings or towers to be effective. The most common use today is to provide Internet access to multitenant buildings such as remote office buildings, apartment buildings, and hotels. Transmitters are used to connect the building to the ISP, and DSL is used inside the building to connect to the wireless transceiver Recommendation Given the type of business model, all internet connection avenues are suitable; but knowing the amount of upload processing that Cathy does, I would have to recommend the cable service vs. the other two options. Although no service is 100% protected, there are...
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...recommend? I think she should consider Wi-Fi because the data rates for Wi-Fi have increased substantially with the introduction of 802.11n, so they are similar to the data rates offered by 100Base-T wired Ethernet. Wi-Fi is considerably cheaper than wired Ethernet because the largest cost of LANs is not the equipment, but in paying someone to install the cables. The cost to install a cable in an existing building is typically between $150 and $400 per cable, depending on whether the cable will have to be run through drywall, brick, ceilings, and so on. The cheapest point at which to install network cable is during the construction of the building; adding cable to an existing building can cost significantly more. Additionally, it’s more convenient for anyone walking or driving within the range of the AP (access point) can begin using the network. IV. Tom’s Home Automation Your cousin Tom runs a small construction company that builds custom houses. He has just started a new specialty service that he is offering to other builders on a subcontracting basis: home automation. He provides a complete service of installing cable in all the rooms in...
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...01 558366 ch01.qxd 11/24/03 10:15 AM Page 1 C H A P T E R Getting Started ou’ll find that Fedora is remarkably friendly and easy to use for work, play, or for just surfing the Internet. This chapter helps you to get logged in and use the friendly Fedora Bluecurve desktop and demonstrates how to log out and shut down the computer. You also learn how to configure the date, time, and your time zone, how to set up any printer you may have connected to your computer, and how to get your computer connected to the Internet. Even if you are eager and able to start using the many powerful applications with little or no help, please take the time to familiarize yourself with the terms and important concepts contained in this chapter, especially the information about users and security in the section “Before You Log In.” 1 ✦ ✦ Y ✦ ✦ Introductory Terms When you learn about a new operating system, you also need to learn new terminology. Here are a few basic terms you should learn to use Fedora. You will see these terms often throughout this book: ✦ Graphical User Interface (GUI) — A screen with icons, menus, and panels for the user to click on to initiate actions such as starting applications and opening files. ✦ Point and click — You move the mouse to point to something on the screen, and then click one of the mouse buttons to perform a task. By default, you click the left mouse button to do most tasks, but very often you can get a custom menu of options when...
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