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Oral Exam

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Submitted By tainguyen5501
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1. Explain the I/O process.
Describes any operation, program, or device that transfers data to or from a computer. Typical I/O devices are printers, hard disks, keyboards, and mouses.
2. You typed “abcd”, but the local printer prints garbled text. How do you resolve this issue? You have the wrong printer driver. For the printer you are using. Delete the current printer configuration and install the right driver. If you don’t have the disk with the driver go online and download the correct driver.
3. What is the OSI model? (Open Systems Interconnection) is a model that characterizes the internal funcions of a communication system by partitioning it into abstraction layers. It helps provide error-free communications across a network and provide a path needed by applications. The seven layers are 1. Physical, 2. Data link, 3.network, 4.transport, 5.session, 6. Presentation, 7. Application,
4. Use the OSI model to explain how an email message from you gets read by the recipient on his/her computer?They physical layer conveys the bit stream through the network at the electrical and mechanical level. The data-link layer provides synchronization for the physical level and does bit-stuffing for strings of 1’s in excess of 5.
5. A user reports that they cannot download a file from the Internet. Using the OSI model, what are some of the questions a network administrator may ask to troubleshoot this problem? Check your tcp/ip configuration, ping the loopback address, clear the address resolution protocol (ARP) cache.
6. Describe popular broadband solutions available to consumers in todays market?
1.DSL, digital subscriber line, uses copper wires and range from the speed of several hundred kbps to millions of bits per second. 2. Cable modem, use coaxial cable and provide speed of 1.5 mbps or more. 3. Fiber, converts electrical signals carrying data to light and sends the light through transparent glass fibers. Exceeding speeds of DSL or Cable by tens or even hundreds of Mbps. 4. Wireless, connects home or business using a radio link between customers location and the service providers facility. It can be mobile or fixed. Mobile wireless broadband are available from mobile telephone service providers and other. A require special pc card with built in atenna that plugs into a user’s laptop computer. Generally they provide lower speeds, in the range of several hundred kbps.
7. A small law office is equipped with a broadband service. The office network has recently encountered various symptoms of degraded services. Some individuals are not able to access data from the file server hosted in house from time to time, while some others are not able to access the email and database through the internet occasionally. How do you propose to determine the cause and correct it?
8. Define the TCP/IP suite of protocols
1. Data link, address resolution protocol/reverse address, datalink switching client access protocol, 2. Network layer, 3, transport layer, 4, session layer, 5. Application layer, 6. Routing layer, 7. Tunneling layer, 8. security
9. How do you determine which ports within TCP/IP are open or have established connections at any given time? There are several ways to check for open ports, one is using port scanners tools. They are free and you don’t have to install any software to scan for open ports. Also you can scan any computer as long as you know the IP address. You can also use Netstat to check for open ports if you are a real admin.
10. A user reports she cannot access the Internet. Describe some of the tasks one would perform related to the TCP/IP protocol in order to troubleshoot this problem. Check your TCP/IP configuration, Ping the loopback address, Ping your computer’s IP address, Clear the address resolution protocol ARP cache.
Quiz 2
1. How would you troubleshoot network connectivity as it realtes to TCP/IP 1. Check TCP/IP configuration, 2. Ping loopback address, 3. Ping your computer’s IP address, 4. Clear the address resolution protocol ARP cache, 5. Verify the default gateway, 6. Ping the IP address of the other computer, 7. Verify persistent route table entries, 8. Use the tracert command, 9. Verify server services on the other computer, 10. Check IP security on the server.
2. Define a windows domain a windows domain is a form of computer network in which all user accounts, computers, printers and other security principals, are registered with a central database (called a directory service) located on one or more clusters of central computers known as domain controllers.
3. What are the steps to determine what domain a computer belongs to? Open system by clicking start button, right click computer, and then click on properties. If your computer is connected to a domain, under computer name, domain, and workgroup settings, you’ll see the name of the domain your computer belongs to. If your computer is connected to a workgroup, you’ll see the nae of the workgroup your computer belongs to.
4. List 3 possible reasons why a user cannot log on to a domain. Changes to the group policy such as blocking interactive logins on a domain member computers or by users in a certain group or OU, Check the settings on user account because perhaps some script has placed the wrong restrictions on the accounts, the domain name may be incorrect.
5. What function can windows server provide for a SOHO? (NetServerDiskEnum) returns a list of locak disk drives on a server, (NetServerEnum) List all visible servers of a particular type or types in the specified domain, (NetServerGetInfo) Returns configuration about a specified server, (NetServerInfo) Sets the operating parameters for a server.

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