 - nslookup is the name of a program that lets an Internet server administrator or any computer user enter a host name (for example, "whatis.com") and find out the corresponding IP address. It will also do reverse name lookup and find the host name for an IP address you specify.
For example, if you entered "whatis.com" (which is one of the TechTarget sites), you would receive as a response our IP address, which happens to be :
65.214.43.37
Or if you entered "65.214.43.37", it would return "sites.techtarget.com".
nslookup sends a domain name query packet to a designated (or defaulted) domain name system (DNS) server. Depending on the system you are using, the default may be the local DNS name server at your service provider, some intermediate name server, or the root server system for the entire domain name system hierarchy.
Using the Linux and possibly other versions of nslookup, you can locate other information associated with the host name or IP address, such as associated mail services. nslookup is included with some Unix-based operating systems and in later Windows systems. In Windows XP, the command can be entered on the "Command prompt" screen. A more limited alternative to nslookup for looking up an IP address is the ping command.
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Learn more about LANs (Local Area Networks) |
| LAN administration guide: LAN administration is an arduous task and your responsibilities often involve many different aspects and may include many tasks. This guide will help you with each step and task. |
| LAN network design considerations: What are the steps to be kept in mind while designing a network having three hundred nodes within a three-floor building and one server room? |
| 10 Gigabit Ethernet tutorial: Connecting data centers, storage, LAN and beyond: Learn how to choose 10 Gigabit Ethernet cabling and components, why new Gigabit Ethernet protocols will improve performance, and how it can all result in data center optimization. |
| Best practices for securing your wireless LAN: Learn best practices for securing a wireless LAN (WLAN) in the enterprise, from systematically monitoring your WLAN for intruders to protecting users and the network itself. |
| A basic virtualized enterprise -- from 'Network Virtualization': Learn why and how to virtualize the network in this chapter from 'Network virtualization' by Victor Moreno and Kumar Reddy. |
| Configuring VLANs: Learn how to configure a virtual LAN (VLAN) in this step-by-step, automated, 15-minute demo. |
| Network administration guide: Network administration responsibilities, such as network design, troubleshooting, backup, documentation, security, and managing users are discussed in this guide. |
| CONTRIBUTORS: |
Ronny Smith |
| LAST UPDATED: |
25 Jul 2002
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