Resolved: basic networking questions

crashmaster · 04-11-2007, 01:10 AM

I recently got a new job as the "IT guy" in a travel agency with a network of about 18 computers. It seems to be configured as a workgroup. I'm not an expert in networking ... coming from a programming background.

I have more than a few questions that I would like to ask, but I guess I need to buy a book on networking. However, I would appreciate it if I get answers to some questions ... such as...

How do I know the IP addresses of all computers on the LAN? without sitting down at each computer.

What is the pool of IP addresses that new computers on the LAN can use from?

Here is my configuration:
IP Address: 192.168.0.168
Subnet mask: 255.255.255.0
Default Gateway: 192.168.0.1

DNS Server: 195.229.241.222
Altnernate DNS Server: 213.42.20.20

Many Thanks

**M_Alani** · 04-11-2007, 02:01 AM

Hi,
To get a better view of the network, you can use programs like "LAN View" (can be found on http://www.jxdev.com/).
If the gateway (192.168.0.1) is a server, you can issue the command 'arp -a' on the command line prompt of the server to see the IP addresses of all the computers. This has one condition to be accurate, make sure all the computers are running and perhaps using the internet (if they use the server to connect to the Internet).
And of course all of this is possible if the gateway is a server not a router. And this command will only show you the IP addresses used and you will not know which IP address is for which computer.
So, its would be better to do some effort and check the IP addresses on each computer.
Your range of IP addresses is 192.168.0.1 to 192.168.0.254

I recommend that you read a book about Network+. It should give you the basic knowledge that you need.

Mohammed

tom_vear · 04-11-2007, 02:55 AM

Quote:

Originally Posted by crashmaster

I recently got a new job as the "IT guy" in a travel agency with a network of about 18 computers. It seems to be configured as a workgroup. I'm not an expert in networking ... coming from a programming background.

I have more than a few questions that I would like to ask, but I guess I need to buy a book on networking. However, I would appreciate it if I get answers to some questions ... such as...

How do I know the IP addresses of all computers on the LAN? without sitting down at each computer.

What is the pool of IP addresses that new computers on the LAN can use from?

Here is my configuration:
IP Address: 192.168.0.168
Subnet mask: 255.255.255.0
Default Gateway: 192.168.0.1

DNS Server: 195.229.241.222
Altnernate DNS Server: 213.42.20.20

Many Thanks

A pool of adresses for IP is usually ina DHCP setup. Its much more probable that they are static IPs. Its obviously not auto assigned PIP addresses as they start with 169........if you look at the tcp/ip porpteites of an NIC on a computer on the lan it will either be set to an IP address or it will be set to auto to aquire ip/dns/gateway

johnwill · 04-11-2007, 06:44 AM

A simple free tool is SuperScan, it'll scan the whole subnet.

crashmaster · 04-25-2007, 12:46 AM

Thanks everyone.

04-11-2007, 01:10 AM	#1 (permalink)
crashmaster Registered User Join Date: Apr 2007 Posts: 4 OS: Windows Server 2003	Resolved: basic networking questions I recently got a new job as the "IT guy" in a travel agency with a network of about 18 computers. It seems to be configured as a workgroup. I'm not an expert in networking ... coming from a programming background. I have more than a few questions that I would like to ask, but I guess I need to buy a book on networking. However, I would appreciate it if I get answers to some questions ... such as... How do I know the IP addresses of all computers on the LAN? without sitting down at each computer. What is the pool of IP addresses that new computers on the LAN can use from? Here is my configuration: IP Address: 192.168.0.168 Subnet mask: 255.255.255.0 Default Gateway: 192.168.0.1 DNS Server: 195.229.241.222 Altnernate DNS Server: 213.42.20.20 Many Thanks

04-11-2007, 02:01 AM	#2 (permalink)
M_Alani TSF Articles Team Join Date: Dec 2006 Location: Iraqi living in Jordan Posts: 42 OS: XP	Re: basic networking questions Hi, To get a better view of the network, you can use programs like "LAN View" (can be found on http://www.jxdev.com/). If the gateway (192.168.0.1) is a server, you can issue the command 'arp -a' on the command line prompt of the server to see the IP addresses of all the computers. This has one condition to be accurate, make sure all the computers are running and perhaps using the internet (if they use the server to connect to the Internet). And of course all of this is possible if the gateway is a server not a router. And this command will only show you the IP addresses used and you will not know which IP address is for which computer. So, its would be better to do some effort and check the IP addresses on each computer. Your range of IP addresses is 192.168.0.1 to 192.168.0.254 I recommend that you read a book about Network+. It should give you the basic knowledge that you need. Mohammed __________________ MSc. in Computer Engineering CCNA,CCAI,MCP,MCDST, http://www.RouterGeek.net http://www.MohammedAlani.com

04-11-2007, 06:44 AM	#4 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 32,581 OS: XP-Pro, Vista, Linux Blog Entries: 1	Re: basic networking questions A simple free tool is SuperScan, it'll scan the whole subnet. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

04-25-2007, 12:46 AM	#5 (permalink)
crashmaster Registered User Join Date: Apr 2007 Posts: 4 OS: Windows Server 2003	Re: basic networking questions Thanks everyone.