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The NetBIOS method queries IP addresses for an existing NetBIOS service. This method detects active hosts by sending NetBIOS queries and listening for NetBIOS replies. It is a fast discovery that focuses on Microsoft hosts or non-Microsoft hosts that run NetBIOS services.
You configure the timeout value and the number of attempts in the Discovery Manager wizard. This method returns the following information for each detected host:
IP address: The IP address of the host.
MAC address: Only if the discovered host is running Microsoft.
OS: This value is set to Microsoft for an active host that has a MAC address in the NetBIOS reply.
NetBIOS name: This value is set to the name returned in the NetBIOS reply.
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To use the full discovery, all the filter and firewall requirements in the ICMP, NetBIOS, and TCP discovery methods apply.
The following is a summary of the supported IP discovery methods:
Discovery Type | Returned Data | Guideline | Mechanism |
|---|---|---|---|
ICMP |
| Use ICMP for a rough and fast discovery | ICMP echo request and reply |
NetBIOS |
| Use NetBIOS for discovering Microsoft networks or | NetBIOS query and reply |
TCP |
| Use TCP for an accurate but slow discovery | TCP SYN packet and SYN ACK packet |
Full |
| Use Full for a general and comprehensive discovery | 1. ICMP echo request and reply 2. NetBIOS query and reply 3. TCP SYN packet and SYN ACK packet |
The method you select to run an IP discovery determines the kind of information the discovery returns and the time it takes to complete an IP discovery. If time is a concern, the following are factors you may consider when configuring an IP discovery:
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