Subnet Masks in VB.NET

Creator PDF417 in VB.NET Subnet Masks

Subnet Masks
Printing PDF-417 2d Barcode In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Reader In Visual Basic .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
The subnet mask tells a TCP/IP host how to interpret IP addresses by defining what portion of the IP address is network ID and what portion is host ID. A 255 in the subnet mask indicates that the corresponding octet in an IP address is to be interpreted as part of the network number. A 0 in the subnet mask indicates that the corresponding octet in an IP address is to be interpreted as part of the host ID. The default subnet masks for Class A, B, and C network numbers are as follows:
Barcode Encoder In VB.NET
Using Barcode drawer for .NET framework Control to generate, create bar code image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Recognizer In VB.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Class A 255.0.0.0 Class B 255.255.0.0 Class C 255.255.255.0
PDF 417 Generation In Visual C#.NET
Using Barcode creator for VS .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Drawer In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
If you compare these mask values with the information that was already presented on Class A, B, and C IP addresses, you would notice the correlation between the place ment of 255s in the mask and octets that represent the network number. For example, the default Class B subnet mask is 255.255.0.0, indicating that the first two octets are to be interpreted as network number, and the remaining octets are to be interpreted as host ID. In the Class B address of 172.16.89.203, we determined 172.16 to be the network number and 89.203 to be the host ID. The same logic applies to the Class A and Class C IP addresses that we analyzed.
PDF-417 2d Barcode Printer In VS .NET
Using Barcode encoder for .NET Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Linear Barcode Creation In Visual Basic .NET
Using Barcode maker for .NET framework Control to generate, create Linear 1D Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Lesson 1
UPC - 13 Drawer In VB.NET
Using Barcode creator for VS .NET Control to generate, create European Article Number 13 image in .NET framework applications.
www.OnBarcode.com
Code 128 Code Set B Generation In Visual Basic .NET
Using Barcode generation for VS .NET Control to generate, create Code 128 Code Set C image in .NET applications.
www.OnBarcode.com
Overview of TCP/IP
Draw Bar Code In VB.NET
Using Barcode drawer for VS .NET Control to generate, create barcode image in .NET framework applications.
www.OnBarcode.com
USS Code 93, USS 93 Generation In VB.NET
Using Barcode drawer for .NET Control to generate, create USS-93 image in .NET applications.
www.OnBarcode.com
10-9
Barcode Recognizer In VS .NET
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Data Matrix 2d Barcode Generator In Java
Using Barcode encoder for Java Control to generate, create Data Matrix image in Java applications.
www.OnBarcode.com
Hosts use the subnet mask to determine their network numbers and also to determine whether a destination host is on the same or a different network. If a destination host is on the same network, the source host will attempt to communicate with the destina tion directly. If the destination host is on a different network, the source host will use its configured default gateway (typically a router) to communicate with the destina tion host. The subnet mask can be referenced in either dotted decimal notation or classless interdomain routing (CIDR) notation. Dotted decimal notation is the format used to enter subnet mask values when configuring Windows XP. The subnet mask values of 255.0.0.0, 255.255.0.0, and 255.255.255.0 are in dotted decimal notation. CIDR notation makes note of the number of binary 1 bits in the subnet mask, and that number of bits is placed at the end of the network ID. For example, the network num ber 192.168.1.0 with a subnet mask value of 255.255.255.0 is referenced as 192.168.1.0/ 24 in CIDR notation. The value of 24 represents 24 binary one bits in the subnet mask; each value of 255 represents 8 bits, there are three 255s in the mask, and 3 8 = 24. Table 10-3 displays several more examples of CIDR notation contrasted with dotted decimal notation.
GTIN - 128 Recognizer In VB.NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
UCC-128 Printer In None
Using Barcode printer for Online Control to generate, create GTIN - 128 image in Online applications.
www.OnBarcode.com
Table 10-3
Code 128 Code Set B Drawer In None
Using Barcode maker for Font Control to generate, create ANSI/AIM Code 128 image in Font applications.
www.OnBarcode.com
Painting Barcode In Java
Using Barcode drawer for BIRT Control to generate, create bar code image in BIRT applications.
www.OnBarcode.com
Dotted Decimal Versus CIDR Subnet Mask Notation
Decode Bar Code In VB.NET
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in .NET framework applications.
www.OnBarcode.com
EAN-13 Generator In None
Using Barcode creation for Office Word Control to generate, create GS1 - 13 image in Office Word applications.
www.OnBarcode.com
Subnet Mask, Dotted Decimal Notation 255.0.0.0 255.255.0.0 255.255.255.0 CIDR Notation 10.0.0.0/8 172.16.0.0/16 192.168.0.0/24
IP Network Address 10.0.0.0 172.16.0.0 192.168.0.0
Subnetting an IP Network Number Subnetting is the process of dividing a single IP network number into multiple IP networks by modifying the subnet mask value. When a subnet mask is modified from the default, it changes how TCP/IP devices interpret the network number and the host ID portion of an IP address. For example, if a subnet mask of 255.255.255.0 is applied to the Class B IP network address of 172.16.0.0, the first three bytes (172.16.0) are interpreted as network num ber, and only the last byte is interpreted as host ID. It is still a Class B address, but the third byte of this address can now be used to define several subnetworks, or subnets, that each support fewer host IDs. In this example, up to 254 subnets can be defined, each with up to 254 host IDs. Table 10-4 outlines the first few ranges of the subnet information for this example. When looking at this table, pay close attention to the third octet because that is where the subnetting occurs.
10-10
Copyright © OnBarcode.com . All rights reserved.