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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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