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Troubleshooting techniques

Troubleshooting techniques

In our lab we have a star network with one Novell server. The problem is that when we give an IP address to each of the clients, and then try to ping them, they ping only if first three numbers of the IP addresses are same. For example if one machine has IP address 192.168.4.111 and the other has 192.168.4.121 then only they ping to each other. On the other hand if one machine has IP add 192.168.4.111 and the other machine has IP add 202.141.50.101, then they do not ping. Why is this so?

You are facing this problem because your are trying to ping a machine which is not in your subnet. It is not possible to ping a system which is in a different subnet. To ping a system which is having an IP address 202.141.50.101 your system should be in 202.141.50.xxx series where xxx could be 102, 103 and so on.


On my LAN the clients run Windows 98 and connects to an NT 4 server. All machines run TCP/IP. All my clients can “see” each other in the Network Neighborhood. The problem is that two of the machines cannot ping any other machine nor can any other machine ping these two PCs. The problematic machines are visible in Network Neighborhood and I can exchange files from these machines. Can you help me out with this. This can happen if the Ethernet card driver is not installed properly, or the card might have got damaged. Follow the steps mentioned below to reinstall the Ethernet card driver:

1. Go to Start - Settings - Control Panel and then double-click on System.
2. Click the Device Manager tab.
3. Click the “Network Adapter” branch to expand it, select the Network card drivers.
4. Click on Remove.
5. Insert the driver CD into the CD-ROM drive and click on Refresh.
6. When prompted to “Specify the location for the driver”, point to the driver file in the CD.
7. Click on Finish to complete the installation of the drivers.
8. Restart the computer.

In order to install the protocols (TCP/IP and Net BEUI) try the steps given below:
1. Right click on the Network Neighborhood icon, from the short cut menu click on the Properties option.
2. From the Network dialog box, click on the Configuration tab.
3. In the Configuration, tab click on the Add button.
4. From the Select Network component type dialog box, select Protocol and click on the Add button.
5. From the Select Network protocol dialog box, under the Manufacturers list select Microsoft. Under the Network protocols list select Net BEUI and TCP/IP protocol.
6. Click OK.

In order to install “Clients for Microsoft network” try the following steps:
1. Right click on the Network Neighborhood icon, from the short cut menu click on the Properties option.
2. From the Network dialog box, click on the Configuration tab.
3. In the Configuration tab, click on the Add button.
4. From the Select Network component type dialog box, select Client and click on the Add button.
5. From the Select Network protocol dialog box, under the Manufacturers list select Microsoft. Under the Network clients list select Clients for Microsoft Networks.
6. Click OK.

In order to install printer sharing please follow these steps:
1. Right click on the Network Neighborhood icon, from the short cut menu click on the Properties option.
2. From the Network dialog box, click on the Configuration tab.
3. In the Configuration tab, click on the Add button.
4. From the Select Network component type dialog box, select Service and click the Add button.
5. From the Select Network services dialog box, under the Models list select File and printer sharing for Microsoft network.
6. Click OK.

If the above procedure does not solve your problem then your network card may be damaged. Replace the network card as this might solve your problem.

If the access-group command is configured on an interface and there is no access-list created, which of the following is most correct?

a. An error message will appear
b. The command will be executed and deny all traffic out
c. The command will be executed and permit all traffic out
d. The command will be executed and permit all traffic in and out
e. The command will be executed and deny all traffic in and out

If an interface has more than one IP access-group command applied to it, then only the first IP access-group command appears in the baseline model. You can add more access groups to that interface in a new scenario.


I have a 133 MHz PC with 32 MB RAM and a 2 GB HDD. I want to connect my PC to an NT network but I am facing a problem while attempting to do so. I have configured the network adapter for IRQ 5 and I/O address range to 320-33F, but this does not work. The message says “your network adapter is not configured properly”. When I set the I/O address range 300-31F with same IRQ 5, it does not show any conflict, but does not connect to the network. The message says “No domain server available to validate your...”. I am quite sure that the cable, the connector, and the adapter are fine.

Try reinstalling network adapter driver as this might solve your problem. Perform the following steps for reinstalling drivers for your Ethernet card:

1. Insert the driver floppy/CD that came with your Ethernet card.
2. Right click on My Computer icon.
3. Click on Properties.
4. Click on Device Manager tab.
5. Select the appropriate Ethernet card.
6. Click on Remove button.
7. Click on Refresh button.
8. Follow the on-screen instructions for completing driver installation.


What is an IP address and how do I get one? Are there any default IP addresses?

An IP address is an identifier for a computer or device on a TCP/IP network. Networks using the TCP/IP protocol route messages based on the IP address of the destination. The format of an IP address is a 32-bit number written as four numbers separated by periods. Each number ranges from 0 to 255. For example, 1.160.10.240 is a valid IP address.

Within an isolated network, you can assign IP addresses at random as long as each one is unique. However, connecting a private network to the Internet requires using registered IP addresses (called Internet addresses) to avoid duplicates.

The four numbers in an IP address are used in different ways to identify a particular network and a host on that network. The InterNIC Registration Service assigns Internet addresses from the following three classes.

Class A - supports 16 million hosts on each of 127 networks
Class B - supports 65,000 hosts on each of 16,000 networks
Class C - supports 254 hosts on each of 2 million networks

Please visit the following links for more information about assigning IP address:


Can you compare the security features of IPV4 vs. IPV6?

The most widely used version of IP today is Internet Protocol Version 4 (IPv4). However, IP Version 6 (IPv6) is slowly gaining acceptance. IPv6 provides for much longer addresses and therefore for the possibility of many more Internet users. IPv6 also includes the capabilities of IPv4 and any server that can support IPv6 packets can also support IPv4 packets.

IPv6 fixes number of problems in IPv4, such as the limited number of available IPv4 addresses. It also adds many improvements to IPv4 in areas such as routing and network auto-configuration. IPv6 is expected to gradually replace IPv4, with the two coexisting for a number of years during a transition period.

Visit the links given below for more information on IPV6:

Visit the links given below for more information on the difference between IPV4 and IPV6:


I connect to a Windows 2000 server through a modem as remote client from Windows NT workstation. The IP address of my server is 10.211.254.26 and subnet mask is 255.248.0.0 and the remote IP address of my workstation is 10.211.254.28 and subnet mask is 255.248.0.0. Now the problem is that I am getting the IP address which I want for my remote client but not the subnet mask 255.248.0.0. The server is always assigning me the subnet mask 255.255.0.0 or 255.255.255.255. How can I get the subnet mask which I want meaning 255.248.0.0. Please let me know.

If your network is configured with DHCP Server, it automatically assigns IP Address, Default Gateway, and Subnet Addresses. If you have static configuration you need to assign all manually. You can give your own subnet mask address, but it should fall within your server subnet mask.

Please visit the following link for more details on Subnet:

http://www.america.net/~dhack/mcse/70-53-12.html


One of our Windows 98 PCs does not connect to the TCP/IP network. It is not visible from any of the PC on network, nor can the machine browse any other PC on the network. However, this machine can ping any other machine. We reconfigured the network card and reinstalled TCP/IP. Can you suggest a solution?

You may need to install network protocols (Client for Microsoft networks, NetBEUI, TCP / IP, File and printer sharing Microsoft Network) in the workstation if you are unable to find any computer in the Network Neighborhood on the LAN.

In order to install these protocols (TCP/IP and Net BEUI) follow the steps given below:

1. Right click on the Network Neighborhood icon, click on the Properties option.
2. From the Network dialog box, select the Configuration tab.
3. From the Select Network component type dialog box, select Protocol and click on the Add button.
4. From the Select Network protocol dialog box, under the Manufacturers list select Microsoft. Under the Network protocols list select Net BEUI and TCP/IP protocols.
5. Click OK.

After this install Client for Microsoft network and print sharing.

Check the website below for installing a Windows 98 system for your network:

http://www.st-andrews.ac.uk/ITS/halls/ w98_connmain.html

You may also face this kind of problem if you are using 16-bit ODI drivers. Here’s a link that may help you solve this problem.

http://www.zdnet.com/zdhelp/stories/main/0,5594,912763,00.html


In a Client/Server environment, proxy server initiates the Internet dialing and the nodes can browse only. If one would like to initiate the dialing through any node, what is to be done?

In order to initiate dialing through the node, so that the nodes on the network can also dial you need to have a network modem attached to the network. Through this network modem any node in the network can dial to access the Internet.


I am running Windows 98 with an Intel NIC. My PC is not connecting to the network. My network cable combination is or+orwhite, blue+bluewhite, green+greenwhite, brown+brownwhite. What should I do?

Assuming that you are trying to connect two computers using RJ45, while crimping RJ45 pairs it is very important that you use the same pattern on the both ends of the cable. If the cable ends don’t match there will be a problem with the communication. So matching the cables is very important. Check the link below for detailed information on RJ45:

http://twistedpair.net/FAQ/cable.asp


I have a Compaq Armada E500 notebook with an in-built 56 K modem and a 10/100 Ethernet card. I have a desktop, which has a modem but no Ethernet card. Please tell me if I can connect the two computers using the modems, or suggest some other way for me to connect the two.

You can use the Direct Cable Connection tool to establish a direct serial or parallel cable connection between two computers. Windows supports serial null-modem standard (RS-232) cables and the following parallel cables for use with Direct Cable Connection:

1. Standard or basic 4-bit cables Enhanced Capabilities Port (ECP) cables.
2. Universal Cable Module (UCM) cables. Parallel cable connections are faster than serial cable connections. Use a serial cable with Direct Cable Connection only if a parallel port or cable is unavailable.

Visit the following link to get more information on cables that are compatible with Direct Cable Connection.

http://support.microsoft.com/support/kb/articles/q142/3/24.asp

The following links provide a detailed description about Direct Cable Connection with various operating systems:


There are five computers in my office, all connected to the network. Now I need to add another PC to the network. I have installed an Ethernet card, the software and have connected the cable to the hub. What do I do next?

Follow these steps assuming that you are using Windows 98 on the new PC. To add the required network components:

1. Right Click on the Network Neighborhood.
2. Click on the Properties.
3. The following components should be added in the list: Client, Adapter, Protocol, Service.
4. Click the Add button, select the appropriate component and follow the on-screen instructions for further installation.

Check the following link for additional information on configuring a Windows 98 PC for your network:

http://www.st-andrews.ac.uk/ITS/halls/ w98_connmain.html


Can you please give me more details on Peer-to-Peer networking?

Peer-to-Peer network (also popularly known as P2P) is a type of network in which each workstation has equivalent capabilities and responsibilities. This differs from Client/Server architectures, in which some computers are dedicated to serving others. P2P networks are generally simpler and less expensive, but they usually do not offer the same performance under heavy loads. A P2P network allows two or more computers to share their resources. Individual resources such as hard drives, CD-ROM drives, and printers can be shared. Resources are accessible from every computer. Because P2P computers have their own hard drives that are accessible by all computers, each computer acts as both a client and a server. A P2P network can be built with either 10BaseT (CAT 5) cabling and a hub or with thin coaxial cable.

The advantages of Peer-to-Peer over client-server systems include:

1. No need for someone to administer the network once it is setup.
2. The network is fast and inexpensive to setup.
3. It’s the easiest type of network to build.
4. Runs well on Windows 95/98/NT and 2000.

Please visit the following links for more information regarding Peer-to-Peer networking configuration.

 
     
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