Subnet Mask - Anritsu MS2024A/MS2026A User Manual

G-4 Operating System Tools

Subnet Mask

This parameter is usually extracted from the Static IP address based upon the class of the
address. It determines the destination of any broadcast messages that might be sent from the
instrument. It can be customized if necessary. The subnet mask may also be provided with
the Static IP address.
Example 1
In this example, a Static IP address has been chosen because no network is available. The
instrument is connected to the network port on the PC with a crossover Ethernet cable (not
included). This is also referred to as Direct Connect:
IP Address: 10.0.0.2
Default Gateway: 10.0.0.2
Subnet Mask: 255.255.0.0
Example 2
In this example, the Static IP address has been assigned with an associated gateway and
subnet mask:
IP Address: 153.56.100.42
Default Gateway: 153.56.100.1
Subnet Mask: 255.255.252.0
G-4 Operating System Tools
A few tools that are built into the Microsoft Windows operating system can assist in making
some determinations about the network that the PC is plugged into.
Ipconfig Tool
Typing at a command prompt will display information about the in-use parameters of
ipconfig
the PC and its network connection. Below is an example of the typical results expected.
The ipconfig display does not report if the information is from a DHCP server or a
Note
Static IP setup
Y:\>ipconfig
Windows 2000 IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix. : us.anritsu.com
IP Address . . . . . . . . . . . . : 172.26.202.172
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Default Gateway . . . . . . . . . : 172.26.200.1
G-2
Appendix G — More About DHCP
MS20xxA VNA Master UG 10580-00166 Rev. C