Agilent Technologies N8201A manual 116

7Glossary

The subnet mask can be used with a device’s IP address to determine the address of the subnet that the device is on. To do this, you perform a logical AND of the subnet mask and the IP address. (A logical AND combines two binary numbers into a single number. The new number contains 1s in positions where both numbers had 1s, and 0s everywhere else.)

For example, if a device has an IP address of 192.168.12.34 and the subnet mask 255.255.255.0 then:

192.168.12.34	=	11000000.	10101000.	00001100.	00100010
255.255.255.0	=	11111111.	11111111.	11111111.	00000000
Subnet Address =		11000000.	10101000.	00001100.	00000000
		192	168	12	0

The device is on the subnet with the 192.168.12.0 address.

A device with the IP address 192.168.12.100 is on the same subnet as the device with the IP address 192.168.12.34 (the 192.168.12.0 subnet), but a device with an IP address of 192.168.100.34 is on a different subnet (the 192.168.100.0 subnet).

116 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 3 Hz to 26.5 GHz