Question 1

David is getting an error message on his screen which reads "Non-system disk or disk" error. How would you start troubleshooting this issue?

Accepted Answer

The most likely cause of this error message is a missing operating system or a failure to locate the boot sector in an operating system.
Key Takeaway: When the computer fails to locate a boot sector with an operating system installed on any of its disks, a missing operating system is the most likely cause.

Question 2

David is switching ON his computer after a month, and an error message displays stating "No operating system found." Which of the following is NOT a possible cause of this issue?

Accepted Answer

If a device cannot be found in SYSTEM.INI, it will not lead to the error message "No operating system found." No operating system found, corrupt boot.ini files, or a corrupt boot sector can lead to this error message.
Key Takeaway: Many times you may delete a program or application from your computer, but one of the files is still called by the System.ini, or the Registry. This leads to the error message. To fix this:
1. Open System.ini in Notepad or with Sysedit.
2. Search for the file name and delete the entire line.
3. If it is not found in System.ini, run Regedit, and find the filename.
4. Delete the and close Regedit.

Question 3

Your Windows XP computer displays a memory dump error. Which of the following would contribute to the physical memory dump error?

Accepted Answer

The computer displays a memory dump error when it detects a condition that it cannot recover from.
Key Takeaway: A fatal error in a program automatically triggers a memory dump error. When the computer performs a "physical memory dump," it takes all the stored parts of the working memory and puts them onto your hard drive and restarts the computer. The next time Windows loads, the files are wiped and all working memory data is lost.

Question 4

You can create a restore point on your Windows XP computer. How can you do so?

Accepted Answer

To create a restore point, follow these steps:
1. Click Start >All Programs >Accessories> System Tools >System Restore.
2. Choose Create A Restore point, and click Next..
3. Provide a restore point description. Click Create.
Key Takeaway: A restore point is a copy of your system configuration at a given point in time. Restore points are created in three ways: manual, automatic, and restore points created before installations. Restore points are useful for when Windows fails to boot, but the computer appears to be fine otherwise, or if Windows doesn't seem to be acting correctly and you think it was because of a recent configuration change.

Question 5

You want to install Automatic updates on your computer at 3:00 PM every day. Which of the following depicts a path that can be used to configure the automatic installation of Windows updates at the same time each day?

Accepted Answer

A standard way of configuring the automatic installation of Windows updates at the same time each day is to Open Automatic Updates on the Start menu, select the Automatic (Recommended) radio button, and specify the time.
Key Takeaway: The Automatic Updates tab in Windows XP lets you configure how you want to handle updating the OS. You can specify that you want to automatically download updates, notify the user when updates are available, or turn off the feature. You can also specify that you want Windows XP to notify you of updates you declined to download at an earlier point in time.

Question 6

John is experiencing a problem with his computer. The computer does not boot to the operating system and the message "NTLDR is missing" appears every time the system is turned on. What is the troubleshooting step he should perform?

Accepted Answer

Use the Recovery Console to fix the "NTLDR is missing error." You can fix missing or damaged boot files using the Recovery Console. The Recovery Console is a text-based startup of Windows that gets you to a command prompt similar to the Windows command prompt. Here you can copy or expand the system and booting files.
Key Takeaway: The most common causes for a computer to display the error "NTLDR is missing" are:
1. The computer is booting from a non-bootable device.
2. HDD is not set up in the BIOS.
3. Corrupt NTLDR and/or NTDETECT.COM file.
4. Mis-configured boot.ini file.

Question 7

Martha gets an error message every time her system boots up. The error message reads "A service did not start." Where is the best place to look for more information on this error message?

Accepted Answer

All system logs related to services, driver, and startup can be viewed in the System Log section of the Event viewer. To open Event viewer, choose Start >Programs> Administrative Tools> Event Viewer. Choose the System link to view the system logs.
Key Takeaway: In the Event viewer, System Event log you can find all system related logs like services, driver, startup, etc. The Application log and Security logs can be used to find all information related to the Application related events and security related events.

Question 8

John is working in the Network repair and troubleshooting unit with a DSL service provider. He is trying to fix an issue with packets being lost enroute to the destination. Which of these utilities can be used to find the number of hops a packet takes from the source to the destination?

Accepted Answer

tracert is the network troubleshooting tool that displays the number of hops taken by a packet from the source to the destination. The syntax for a tracert command is tracert hostname.
Key Takeaway: tracert is the most commonly used command for network troubleshooting under conditions of intermittency or packet loss. The timing information from tracret can be useful for detecting a malfunctioning or overloaded router.

Question 9

David has been told by a Technical Support Executive to clear all temporary internet files from his computer to improvethe internet access speed and reliability on his computer. Which of the following utilities should he use?

Accepted Answer

Disk cleanup utility can be used to clear the temporary internet files on the computer. To use the disk cleanup utility:
1. Click Start, and then click Run. Type cleanmgr, and then click OK.
2. Select the drive-letter for the current Windows installation and then click OK.
3. Select Temporary Internet Files from the list.
4. Uncheck all the other entries and click OK.
5. Click Yes to confirm deletion.
Key Takeaway: Internet Explorer copies any images or HTML files from websites you visit frequently to a directory on your hard drive. Although these cached contents quicken your access to pages that have been already accessed, a large number of temporary internet files can slow down your computer. Clean this folder regularly.

Question 10

Mark has implemented a Firewall on his corporate network. A client reports that he is not able to access the FTP site outside the network. Which port is being filtered?

Accepted Answer

The FTP uses ports 20 and 21 for its operation. If the users of a network need FTP access, ports 20 and 21 must be left unfiltered on the firewall.
Key Takeaway: File Transfer Protocol (FTP) is a standard network protocol used to exchange files over an Internet Protocol computer network. FTP servers use TCP port 21 to listen to incoming connections from clients. Data connections use port number 20. Make sure these ports are not filtered on the firewall.

Question 11

George has just attached a computer with an NIC to a network. He is not sure if the NIC has a physical connectivity with the network. Which of the following demonstrates that there is successful physical connectivity between your NIC and the network?

Accepted Answer

The best way to ensure that a physical connectivity between the NIC and the network is valid is to check the glowing NIC LEDs. As long as there is a packet exchange between the computer and the network, the LEDs glow.
Key Takeaway: While troubleshooting a network, it is very crucial to check the NIC status before you proceed further. The green LINK LED on the NIC confirms the integrity of the physical connectivity.

Question 12

Which of the following network troubleshooting tools helps you find the path taken by a data packet from the source to the destination?

Accepted Answer

Tracert is a utility used to determine the route taken by packets across an IP network. By showing a list of routers traversed, it allows the user to identify the path taken to reach a particular destination on the network.
Key Takeaway: This can help identify routing problems or firewalls that may be blocking access to a site. Tracert is also used by penetration testers to gather information about network infrastructure and IP ranges around a given host. It can also be used when downloading data and if there are multiple mirrors available for the same piece of data, one can trace each mirror to get a good idea of which mirror would be the fastest to use.

Question 13

You want to access a remote host across a network through a terminal window. Which of the following protocols would you choose to achieve this?

Accepted Answer

Of the protocols mentioned here, Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive communications facility. It provides access to a command-line interface on a remote host via a virtual terminal connection, which consists of an 8-bit byte oriented data connection over TCP.
Key Takeaway: You can enter commands through the Telnet program and they will be executed as if you were entering them directly on the server console. This enables you to control the server and communicate with other servers on the network. To start a Telnet session, you must log into a server by entering a valid username and password. Telnet is a common way to remotely control Web servers.

Question 14

Which of the following protocols are responsible for translating a fully-qualified domain name into the IP address?

Accepted Answer

The Domain Name System or DNS is a protocol that translates domain names into IP addresses. It translates domain names meaningful to humans into the numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.
Key Takeaway: DNS is a distributed database system that uses the client-server model. The nodes of this database are the name servers. Each domain or sub-domain has one or more authoritative DNS servers that publish information about that domain and the name servers of any domains subordinate to it. The top of the hierarchy is served by the root name servers.

Question 15

Which of the following protocols are used to send messages to the e-mail server for relaying?

Accepted Answer

SMTP is used to send messages to a mail server for relaying. It is a text-based protocol in which a mail sender communicates with a mail receiver by issuing simple command strings and supplying necessary data over a TCP connection.
Key Takeaway: SMTP is only a delivery protocol. It cannot pull messages from a remote server on demand. Protocols such as POP and IMAP are specifically designed for retrieving messages and managing mail boxes.

Question 16

You are a technician and a network user calls up complaining that he is not able to access the network resources. What is the first thing that you should do?

Accepted Answer

If a user is not able to access network resources, the first thing that you should do is to check to be sure the link lights on the NIC are working. The link lights should blink with a solid or blinking green.
Key Takeaway: If the Link LEDs are verified to be working, then you can proceed further with the troubleshooting, assuming that physical connectivity is intact. If the link lights do not work, then troubleshoot for no physical connectivity.

Question 17

As a technician of ABCD.com, if you are asked to configure a PC that needs to be connected to the Internet, what are the 2 things you will check for FIRST?

Accepted Answer

While configuring the IP address on a computer, the first thing to check for is the IP address of the default gateway and the DNS server. Email-server, DHCP server, and hostnames are not crucial while configuring the IP address.
Key Takeaway: The default gateway is an ISP-provided device that connects the user to the Internet. It can be a DSL or cable modem. Along with the default gateway details, the user also needs to enter valid DNS server IPs, preferably two.

Question 18

What is the default subnet mask for an IP address 192.168.10.10?

Accepted Answer

The default subnet mask for the IP address 192.168.10.10 is 255.255.255.0.
Key Takeaway: The method to find out the subnet mask for a given IP address is:
1. Check the class of the IP address given.
2. If asked for a default subnet mask for a particular class of IP, the subnet mask would have as many 255s as the sequence of alphabets. For example, class A will have one 255, class B will have two 255s and class C will have three 255s.

Question 19

You ping the loopback address, but do not receive any response. What do you think is the most likely cause?

Accepted Answer

If pinging a loop back address does not give a reply, it is most likely that the NIC is faulty and the TCP/IP protocol is not functioning.
Key Takeaway: 127.0.0.1 is the loopback address of a computer. Pinging the loopback address determines if the NIC is working. In case the ping request fails, then the NIC needs to be re-seated or changed.

Question 20

You are the technician at ABCD.com. You want to ping the loopback address on a PC that has been configured with the static IP address of 192.168.1.122. What commands would you use to achieve this?

Accepted Answer

Use the ping 127.0.0.1 command to perform the loopback test. This test should be performed locally on the computer.
Key Takeaway: The loopback address sends outgoing signals back to the same computer for testing. In a TCP/IP network the loopback IP address is always 127.0.0.1 and pinging it will return a reply. The loopback address allows a network administrator to treat the local machine as if it were a remote machine.

Quiz 19: Essentials