Lan networks

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  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 1 This is the third portion for the Module Objectives of the IC 3 Computing Fundamentals exam. CCI has broken down the full exam into two units to facilitate a user-friendly learning environment. Focus in each unit will be on learning the individual components for that portion of the exams and develop/enhance knowledge and skill sets for the student. This Unit is meant to be a digital literacy course to introduce the Internet and how to get connected to the Internet (or other networks). Each unit is broken down into small modules of information for the students to take in. Use this as a guide to let students know what topics will be covered and where they might find information on same. Some units will be a bit larger than others, depending on the amount of pictures used or the type of information. Be prepared that some lessons will require you to do more discussions with the class whereas others can be enhanced through visual aids, e.g., having a hard drive that has been taken apart to show them what it comprises of, different memory chips, etc.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 2 This is an outline of the topics covered in this Lesson. Wherever possible, try to have additional pictures or examples of topics discussed in this Lesson. Use the book as reference if you don’t have additional pictures or hardware examples.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 2 Objectives 1.1.1, 1.1.2 Introduce what a network is in very simple terms. Students do not need to know the whole intricacies of what a network is and how it is connected together; focus instead on how a network can be set up the moment you connect two or more computers together to share information or devices. Open the discussion to the class of possible networks they already use and may not be aware of, many of which will likely be discussed in this course (or already mentioned in Unit 1 of the Computing Fundamentals Module). Examples could be the ATM machine, buying insurance, when the realtor displays information about different homes, etc.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 2 Objective 1.1.3 Have a discussion with the class regarding the types of computers that can be hooked up to a network. Review back to Module A regarding all the different types of computers and then discuss how many are still being used today in various ways. For example, an insurance company may have the history of all insurance purchases stored on a mainframe that is then accessed from PC’s by employees in Head Office and microcomputers set up as terminals in the branch offices. Have students discuss other types of businesses where a network may be used with different computer types, e.g., retail stores, sports organization, government offices, etc.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 3 Objective 1.1.2 This is a very simple explanation of how a PC can be connected to a network. For the most part, users tend to see only what’s happening on the outside. You may want to have students look at the external components that allow the system they are using to connect to the network at your location. For example, have them find the network cable that connects from the back of the computer to the wall, have them notice the type of connection (look similar to the telephone jack) and how there’s one for the computer as well on the wall (or hub), etc. Don’t go into any technical information regarding how networks are connected. The most important thing here is to point out how the computer needs a card that recognizes the computer type, the appropriate cable, and a connection type to the network.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 3 Objective 1.1.2 As with most areas in the computer industry, standards have been set up for networks so that a variety of computers can share information regardless of location or type. As technology advances, the speed and size of information that can be shared has increased significantly but must still follow standards. Briefly discuss what protocols are and how they are basically rules that have been set up so information can be shared. This is true regardless of whether it’s for sending information or identifying information for use with applications. As you can point out with the upcoming pages and slides, standards have been set up for different size networks.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 4 Objectives 1.1.1, 1.1.3 Have a discussion with the class on why this is the most common type of network set up for the home. Do not go into whether it can be a wireless version versus cable. This topic only addresses the fact that most homes tend to have this type of network as everyone can share the same information at any time. You may also want to build into the discussion about how some small businesses may have a peer-to-peer network initially but likely will upgrade to a more complex type of network as the business grows.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 4 Objective 1.1.3 This is the typical type of network that most people will find when they walk into a large company, although it looks as if each employee has a PC only. In most cases, the data they access comes from a central computer which generally is the network server. The configurations can be much more complex than the diagram shown here. You may want to use this diagram as further explanation on how information can be shared.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 5 Objective 1.1.2 Review from Module A about the different types of networks that are possible. For the purpose of this courseware, focus is primarily on LANs and WANs. Remind students of what these acronyms stand for and then discuss the difference between the two types of networks. Introduce the cloud and what it means as it will be used more frequently as you progress through the book.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 6 Objectives 1.1.1, 1.1.3 This begins the discussion of what is required in order to connect a PC to a network. It does not go into detail from the network installation or setup area. Keep the discussions simple in that all networks require the same types of components in order to connect to a network but the emphasis here is on what is needed for the PC to connect to a network of some sort.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 6 Be sure to discuss the benefits and disadvantages of each type of connection. Many of these are used either in entirety or in combination with other types of cabling. For instance, the majority of the company may be connected to the network with coaxial cable and the users with notebooks have wireless technology for portability purposes.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 6-7 For simplicity purposes, only an internal and wireless card for the PC is shown here. You may want to refer students back to the book for the other types, or if you have actual hardware, distribute for the class to review.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 7 If you have an example of a hub, be sure to use it as a demonstration to the class on what and how a hub can be useful for connecting several computers to a network. Hubs can be set up for a small number of users (home) or a large number of users (one floor) at a branch. Generally hubs can be purchased with a maximum number of ports based on the type of network set up; the larger the number of ports the more expensive the hub will be. At the same time you may want to discuss how hubs are not required with wireless technology; companies have begun switching to wireless networks if the bandwidth allows for the same or faster speeds for transferring data.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 8 Segments are basically different areas or locations that are connected together to share information and yet keep the flow of information faster within its own area. This could be similar to a branch office where information about customers in their locale are kept in hard copies in the filing cabinets, and electronic versions of the forms may be stored on a server in the branch that then connects to Head Office for archive storage. As the Head Office server recognizes the branch as a segment, other branches (segments) can also access the same information from the first branch when required. In the meantime, transactions processed on the first branch are faster as it is moving through their own server first and does not need to go through the Head Office server unless someone outside of their location is requesting information.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 8 Relate the bridge device here to an actual bridge that connects two different cities. Traffic can flow back and forth; the moment there is a problem on the bridge (e.g., broken railing, large hole in one of the lanes, etc.), nothing can be done to fix the flow or the bridge itself until all cars are off the bridge. Once the problem is fixed, then traffic can reflow. A bridge is one method of connecting segments to the main network. This option isn’t used as often anymore by network specialists; most networks now have routers or switches installed instead to allow for constant flow of information, even with problems in the original transmission.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 8 There will always be pros and cons of each type of device used to connect different segments to the network. The deciding factor will depend on what type of error detection and data transfer requirements. Most companies use routers in one form or another; most popular types of routers are for managing e-mail. Stress the last point here as many home users are switching to wireless so multiple computers can share the Internet connection. However, they don’t always set up the security options and may find that there are additional costs or problems with their computers based on the type of access they leave open to unauthorized users.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 8 This is the most common type of connector device that networks will use as they take full advantage of the size of the bandwidth from the computer to the network. This open can sometimes be more expense than the hub or router option, but does provide faster access times for users when requesting information from the server.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 9 Be sure to use the diagram as part of your discussion on firewalls. Firewalls have become much more critical in the past few years as more people get connected to the Internet and want to prevent unauthorized people from accessing the information on their server, or using their connection for free, but mainly to protect the users on the network from any viruses or other types of dangerous information usually sent via e-mail.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 9 As you begin to look at the benefits of being on a network with the class, be sure to emphasize that being on a network does not make your system faster. What it really does is give you access to other information or other people you would not be able to access as a stand-alone system. Most people get confused about the purpose of a network and do not fully understand the benefits of networking. In most cases, they consider networks to be used by companies only and do not relate this to the Internet or setting one up at home.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 9 This list of benefits for communicating is not complete by any means. These are the main advantages that most people want or enjoy about being online and having the option to communicate with others, wherever they may be. One of the most common ways to communicate online is with instant messaging. You may want to introduce a few of the more popular IM programs (i.e., MSN, Yahoo, AOL, ICQ, etc.) that perform the same function. If people are not sure about this, relate it to having a conversation with someone else but only one person can talk at a time (no interruptions unless user chooses not to send their next text message). Don’t spend a lot of time discussing IM’s as there is an area in the book that looks at this in a bit more detail to show why IM’s are so popular (Lesson 3).
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 10 From an administrative side, this is one of the major benefits of networking, especially for doing upgrades or technical support. If the device has been set up on the network for users to share, network administrators can generally do maintenance or upgrades from one location instead of having to move from workstation to workstation. Companies often like this option, especially if the device is costly and not everyone needs one for confidential or frequent use. Provide examples of items such as scanners, color printers, photocopier/fax machine/printer (all-in-one device) that are often set up as shared items for users.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 10 Any time people need to share files or folders of information, it is always handy to have a central area where people can look for the information first. Provide examples of the types of documents that could or should be shared rather than keeping it on a local drive (e.g., marketing promotional material, catalogs, inventory/product listing (limited access depending on user type), customer lists or actions, etc.). This is another advantage for network administrators who can then set up options and features from the network perspective to back up the data, set up rights for specific groups, install devices for groups only, etc.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 10 Introduce why a company might want to set up a dedicated server to handle specific types of tasks and then discuss the different types available. Not every company will have all of these types of servers in their location; some may have combination or share with another company such as an ISP who manages their mail requirements.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 11 Objective 1.1.5 The order and amount of detail for the number of disadvantages is not meant to be used as level of importance. Fill in more details based on your experience or preference. This topic can be the biggest disadvantage of being able to share information, especially if the network fails for whatever reason (e.g., blackout, network drive fails, lost connection to the Internet, etc.). In many instances when the network goes down, there generally is no way to keep the productivity until the problem for the network is repaired. Some users can work on their hard drive but the information will still need to be copied back onto the network when available; those who have workstations with no hard drive, they will be down completely.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 11 For most companies, this will be a big consideration whenever they need to upgrade, change, or add on new servers to their existing server. There are many more costs involved than just buying the hardware and these costs can increase significantly once a decision has been made as to what, when, and how much. Most new network installations of whatever nature tend to occur over the weekend to minimize the downtime for users, which means there is the additional cost of paying overtime or weekend rates for staff or consultants.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 11 Objective 1.1.6 The points here are not listed in any particular order as much as they are meant to be a checklist of options to set up as standards for a company and its network. Most network administrators are familiar with these options and this is meant to provide a list of items that may cause frustration for the user who doesn’t understand why there are restrictions.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 12-13 Spend a few moments discussing the other points on how to reduce any security risks on a network. Many of these points will be familiar from earlier discussions in previous Units, but bears discussing, especially in relation to sharing information.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 13 Some users do feel this is a big disadvantage of working on a network, especially if it is items they create for their own purposes or the feeling that someone else is watching what they’re doing. In most cases, network administrators are too busy to monitor everyone’s activities other than when there’s a problem that needs to be addressed, e.g., theft, viruses, etc. The last point is something that can be a contentious point with most people, depending on the atmosphere in a company. For the most part, users should always check with their employer or take responsibility should there be a problem with having personal documents or items on the computer, even though it may be stored on a local drive. Some companies prefer their employees to be working only on business documents during the day, especially given that most people will have a computer at home they can use for personal documents. Open this up as discussion with students for different viewpoints.
  • Essential Skills for Digital Literacy Module B: Key Applications © CCI Learning Solutions Inc. Common Elements – Slide Pg 13 This is one area that cannot be stressed enough with users who access the Internet a lot or receive a lot of e-mail. Many students do not consider that they could be a target, even though they may not do a lot of work on the Internet or with mail. Viruses can occur with documents received from other people who are on the same network and because you share the information, this is one of the fastest ways that viruses can spread. There is no need to go into a lot of detail about viruses at this point. More detail about viruses is provided later in this courseware (Lesson 7 of Unit 2: Using the Internet).
  • Lan networks

    1. 1. Networking
    2. 2. WALT: Networking Fundamentals Know about: What a network is Network standards Different types of networks What’s required to connect to a network Advantages and disadvantages of being connected to a network© CCI Learning Solutions Inc. 2
    3. 3. What is a Network? Two or more computers connected together to share resources and information© CCI Learning Solutions Inc. 3
    4. 4. What is a Network? Computers connected to network can be any type of computer – Each computer could be configured with different operating system – No restrictions other than having network software understand rules and language needed to recognize computer type and operating system© CCI Learning Solutions Inc. 4
    5. 5. Where the Personal Computer Fits PC most commonly used tool to connect to network – Microprocessor chip is “brains” of PC – Communicates with other components of PC via internal connecting device called “bus” – To communicate with external devices, PC needs interface card To connect PC to network, need interface card for type of network, suitable cable, and appropriate software © CCI Learning Solutions Inc. 5
    6. 6. Networking Standards When two or more computers interconnected to communicate and share resources, you have a network Protocols are rules governing type of cables, interface cards, and electrical signal format Also govern how information flows between computers on network called transport protocols: – indicates how computer needs to send information over network – how receiving computer checks that information was received correctly – how sending computer must address information so it goes to correct destination computer Application level protocols determine how program on one computer communicates with program on another computer © CCI Learning Solutions Inc. 6
    7. 7. Peer-to-Peer Networks Inexpensive and easy to put together Ideal for home and small office networks Called peer-to-peer because all computers have equal authority Protocols included in Microsoft Windows 95/98/ME but several proprietary peer-to-peer network systems available also Windows NT (or higher) has network component built in with more complex protocols to connect computers © CCI Learning Solutions Inc. 7
    8. 8. Client - Server Networks Typical on large networks where one computer (network server) dedicated to controlling network traffic and managing resources Provides better performance and security as server controls who can access what resources and when Also called central server as all files stored here Server can be any type of computer with server software installed, and users clearly identified with access rights Client computer can be any type of computer with network card and appropriate software to connect to server © CCI Learning Solutions Inc. 8
    9. 9. Topologies - Structure Star – All the network devices connected to a central computer which is often used as the file server Ring – Each of the devices on the network is connected in a ring or a loop. (Each machine has a connection to the one previous and the one after it in the loop) Bus – Each of the devices is connected directly to a main communications line, called a bus MESH – All the computers connected to each other Click here to view animations on topologies CJR 2008 9
    10. 10. Star Network Topology Figure 8- 5 CJR 2008 10
    11. 11. Star: Advantages and Disadvantages Advantages of a Star – If one cable fails the other stations are not affected – Consistent performance even under heavy use – Reliable market proven system – No problems with collisions of data since each station has its own cable to the server – Easy to add new stations without disrupting the network Disadvantages of a Star – May be costly to install because of the cable lengths required CJR 2008 11
    12. 12. Bus Network Topology 12 CJR 2008 Figure 8-6
    13. 13. Bus: Advantages and Disadvantages  Advantages of a Bus – Easy and inexpensive to install as it requires the least amount of cable of the network types – Easy to add more stations without disrupting the network  Disadvantages of a Bus – The whole network goes down if the main cable fails at any point – Cable failure is difficult to isolate – Network performance degrades under a heavy load – Information can be transmitted in either CJR 2008 direction and occasionally there is data collision. 13
    14. 14. Ring Network Topology CJR 2008 14 Figure 8-7
    15. 15. Ring: Advantages and Disadvantages Advantages of a Ring – No dependence on a central computer or file server and each node controls communication to and from itself – Transmission around the network is one way only – High data transmission rates are possible Disadvantages of a Ring – If one node breaks down transmission is disrupted CJR 2008 15
    16. 16. Mesh Network Topology CJR 2008 16
    17. 17. Mesh: Advantages and Disadvantages Advantages of a MESH – Communication is not disrupted – Alternative routes to node points/machines – Security – packages can arrive/be sent via many different routes – Backup – with multiple connections it is easier to distribute the data in case of disaster Disadvantages of a MESH – Cost • of cables required to link machines together • Of machines – similar spec machines required at each location to be able to take over – Difficult to install and reconfigure CJR 2008 17
    18. 18. LANs and WANs Difference lies in who is responsible for cabling – LAN network stays within building – WAN if network crosses public street and uses publicly-supplied cabling for part of network When computer or LAN connected to another computer or LAN in another city or country, public portion of WAN represented schematically by “cloud” © CCI Learning Solutions Inc. 18
    19. 19. Connecting to a Network Standard network devices facilitate putting network together Cabling comes in standard lengths complete with appropriate connectors Which options, devices, or software you use depends on needs and requirements for network Variety of connection or cabling options available to access information to or from network – Newer connection types allow the data to be transferred between computer and network to flow much faster© CCI Learning Solutions Inc. 19
    20. 20. Connection/Cabling OptionsCoaxial Wire with center wire surrounded with insulation and then grounded cover of braided wire.Fiber Optics Made up of bundled glass or plastic fibers (threads) to transmit data.Broadband Single wire that can handle multiple paths or channelsWireless Work with radio frequencies for data transmission.Infrared Wireless option works with infrared light waves to transmit data.© CCI Learning Solutions Inc. 20
    21. 21. The Network Interface Card (NIC) To connect to network, PC must have network interface card (NIC) Each NIC has unique number or address and connector appropriate for type of cabling chosen Come in variety of styles and models appropriate for computer type being connected to network© CCI Learning Solutions Inc. 21
    22. 22. The Hub Connect PCs together to form network – Cable from NIC in each PC connects to port on hub – Cable from hub required to connect to network Relatively inexpensive to purchase and install Main disadvantage of hub is all users connected to hub share equal maximum transfer speed © CCI Learning Solutions Inc. 22
    23. 23. Network Segments If network has two or more network interface cards, each card considered a segment Segments allow network traffic to flow faster, depending on which devices are used to manage amount of requests at network© CCI Learning Solutions Inc. 23
    24. 24. The Bridge Connects network segments to handle network requests Do not analyze or re-route messages which makes receiving information faster Will not re-route or re- transmit information if anything is wrong with connection at either end until first transmission received completely © CCI Learning Solutions Inc. 24
    25. 25. The Router Work similar to bridges except examine destination address of information and pass it on appropriate segments only Bridges may be faster than routers but will not check information coming in When installing wireless router to network, be sure to set up encryption security options to prevent unauthorized access from external sources using connection © CCI Learning Solutions Inc. 25
    26. 26. The Switch Works similar to hub except that each user connected to switch has access to full bandwidth Can also be used to join network segments© CCI Learning Solutions Inc. 26
    27. 27. The Firewall Can be physical device or specialized software installed to prevent any unauthorized external access into any network connected to Internet Designed to check any messages that travel through network and ensure it matches specified security requirements set up by company © CCI Learning Solutions Inc. 27
    28. 28. Benefits of Networking Networking does not make individual workstations faster or more powerful! Benefits of networking fall into two main categories: – Communication – Sharing of resources© CCI Learning Solutions Inc. 28
    29. 29. Communicating To send information generated on stand-alone PC requires manual process whereas users on network send information electronically Messages can be stored on network and are not lost if recipient isn’t available when messages sent or received Many communication software allows users to instantly message someone else without using e‑mail – “Real time interaction” – Multiple users can participate in same conversation – Some limitations but can be minor issues in exchange for ability to communicate with each other in real time © CCI Learning Solutions Inc. 29
    30. 30. Sharing Devices Some devices can be expensive to set up on every PC and networking allows devices to be shared – Can be cost savings for capital expenditures as well as productivity time for technical support or maintenance Connecting devices shared by multiple users via network allows Network Administrator to perform updates or troubleshoot problems from server location© CCI Learning Solutions Inc. 30
    31. 31. Sharing Information In network environment, files or folders on any disk can be set up to be shared Whenever group of people want to share information, referred to as workgroup – Group of users who share business documents transfer or save files to common network – Common network becomes centralized server wherein server has control over which files are accessed and which users can use those files Extremely helpful to network administrator for setting up rights or performing maintenance for workgroups© CCI Learning Solutions Inc. 31
    32. 32. Using Dedicated Servers Network – Control network traffic and security – May perform same tasks and contain same information as file or database server File – High speed, high capacity hard drive, usually to handle back-up needs Web – Stores information in web format and information accessed with browser for company intranets Mail – Manages high volume of internal and external e-mail Database – Generally used in complex database applications where many users need to access data at same time © CCI Learning Solutions Inc. 32
    33. 33. Disadvantages of NetworkingDependency Big disadvantage in that organization’s activities depend on network to be up and running – If network fails, users lose access to information and ability to communicate electronically – In some instances can work from local drive, but if company’s information stored and shared from server, cost of downtime may be more expensive in long term© CCI Learning Solutions Inc. 33
    34. 34. Disadvantages of NetworkingExpensive For installation and maintenance If network complex with many users, additional need and expense to employ network administrator Need “disaster and recovery” plan, not just for theft or security breach, but also power outages or potential hardware failure Setting up or upgrading a network server should always be discussed with network administrator or consultant who specializes in networks prior to making any decisions© CCI Learning Solutions Inc. 34
    35. 35. Disadvantages of NetworkingSecurity Risk Every person who logs into server has valid login id, and set up according to company’s standards Every person who logs into server has valid password When setting up new user, ensure name and information about user entered correctly Audit each user to ensure access rights to programs and files are same Requests received for access rights must have signature from corresponding manager Delete users who no longer work for company Do not ever give out passwords © CCI Learning Solutions Inc. 35
    36. 36. Disadvantages of Networking Staff who work with network administrator should have own login id and password set up Firewall set up for Internet connection that has been set up to check user id when sending or receiving messages If access authorized for users outside network, ensure firewall checks these user ids when request received to access network from remote location Restrict any users from being able to delete files from any folder on any network drives Antivirus program installed on server is current and has latest protection files Perform maintenance checks periodically as well to see what activities may have occurred Encourage users to have latest updates of Windows on local computers © CCI Learning Solutions Inc. 36
    37. 37. Disadvantages of NetworkingLoss of Autonomy or Privacy Obliged to work in network environment Privacy may be concern for confidential material “Private” drive set up on network for personal or confidential files but network administrator can still see these files If share computer, even though they log in with their own id, they can still see files on local General business rules dictate that anything you work on a company computer belongs to the company, even though you may work on it on your own time© CCI Learning Solutions Inc. 37
    38. 38. Disadvantages of NetworkingViruses Vulnerable to virus attacks Some viruses, called worm viruses, specifically target servers New viruses being created every day and it becomes more prudent to read screen carefully before automatically opening message or clicking highlighted button on screen All antivirus programs provide a feature to automatically detect in “real time” Remember to run scan of computer on frequent basis and check for updates© CCI Learning Solutions Inc. 38

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