vlsm subnetting

unique in a network. Each network device uses an IP address as the unique identifier.4 IP Address Classification:IP address addressing has undergone three historical stages:1 Classified IP addresses: the corresponding standard protocol was adopted in 19812 subnetting: This is an improvement to the most basic address method for IP addresses, which was passed in RFC 950 in 19853 Composition of the Net: presented in 1993.IP address = network number + ho

significant waste of IP addresses. Therefore, the IP address also supports VLSM technology, which can be further divided into subnets based on the ABC network.2. Subnet maskIn order to identify the network part and the host part of the IP address, to be combined with the address mask, the mask is also the same as the IP address of bits, in dotted decimal notation. The IP address network portion of the corresponding mask portion is all "1", the host p

that the default subnet mask for Class A addresses is the 255.0.0.0,b class of 255.255.0.0,c class 255.255.255.0. The following table is the Class C address subnetting and related subnet masks:Number of subnet-subnet-netmask hosts available hosts1 255.255.255.128 128 1262 255.255.255.192 64 623 255.255.255.224 32 304 255.255.255.240 16 145 255.255.255.248 8 66 255.255.255.252 4 2You may notice that the table above is divided by the number of hosts an

that the default subnet mask for Class A addresses is the 255.0.0.0,b class of 255.255.0.0,c class 255.255.255.0. The following table is the Class C address subnetting and related subnet masks:Number of subnet-subnet-netmask hosts available hosts1 255.255.255.128 128 1262 255.255.255.192 64 623 255.255.255.224 32 304 255.255.255.240 16 145 255.255.255.248 8 66 255.255.255.252 4 2You may notice that the table above is divided by the number of hosts an

address divided into 2 subnets with 22 bits to identify the network number, its subnet mask is: 1111111111111111 1111111110000000 is 255.255.255.128. So we can see that the default subnet mask for Class A addresses is the 255.0.0.0,b class of 255.255.0.0,c class 255.255.255.0. The following table is the Class C address subnetting and related subnet masks:Number of subnet-subnet-netmask hosts available hosts1 255.255.255.128 128 1262 255.255.255.192 6

that the default subnet mask for Class A addresses is the 255.0.0.0,b class of 255.255.0.0,c class 255.255.255.0. The following table is the Class C address subnetting and related subnet masks:Number of subnet-subnet-netmask hosts available hosts1 255.255.255.128 128 1262 255.255.255.192 64 623 255.255.255.224 32 304 255.255.255.240 16 145 255.255.255.248 8 66 255.255.255.252 4 2You may notice that the table above is divided by the number of hosts an

this point the network number bit becomes 25 bits, and the host label becomes 7 bits. Similarly borrowing 2 host bits can divide a class C network into 4 subnets ... How did the computer know if the network was divided into subnets? This can be seen from the subnet mask. The subnet mask is as 32bit as the IP address, and the subnet mask is determined by using "1" for all corresponding bits that identify the network number in the IP address, and the bits corresponding to the host number are "0".

IP address to multiple hosts in the internal network. Through Nat address translation, the reserved IP address is converted into a real IP address when accessing the external network. This ensures that the internal network adopts the TCP/IP protocol while maintaining the uniqueness of the IP address on the Internet. If the internal network is not connected to the Internet, you can actually use any type of address. Otherwise, the connected network address must be unique.

network. There are currently three methods of partitioning: taxonomy, subnetting, and CIDR.Classification Basic classificationTaxonomy is one of the earliest and simplest partitioning methods. It divides the IPV4 address into five categories: A, B, C, D, and E.Class A divides the first 8 bits into the network ID, but the 1th bit must be 0;Class B divides the first 16 bits into network IDs, but the first 2 bits must be 10;Class C divides the first 24

192.168/16When connected to a public network, it is converted to a public address via NAT (Network address translation) NAT: Public Private One by one correspondence (typically used to hide internal structures) PAT: Re-use the IP by changing the port number; The disadvantage is that each time you have to disassemble the tcp,checksum, and then look at the port number 3 Mask and CIDR (classless Inter Domain routing classless routing between domains) Definition: Continu

IP Address Five classes of IP addresses, just remember 0-127,128-191,192-223,224-239 (multicast), 240-255 (reserved), 127 is the self-ring address, 0.0.0.0 is the network address, 255.255.255.255 is the broadcast address. Private IP three classes, 10.x.x.x,172.16.x.x-172.31.x.x,192.168.x.x. Sub-network DivisionFrom the point of view of address assignment, the subnet is the extension of the network segment address. In order to make the use of IP address more flexible, only assign IP address netwo

This information from the Huawei Enterprise Technology Exchange community about the computer network is very good, recommended to everyone!The following is a link to a series of articles:"Big Pulpit 01" Using TCP/IP model to understand data communication processHttp://support.huawei.com/ecommunity/bbs/10217323.html"Number of Big pulpit 02" IP subnetting (VLSM)Http://support.huawei.com/ecommunity/bbs/1021732

A summary of the concept and function of two-subnet mask how to use subnet mask four how to get network/host address by subnet mask classification of five subnet masks six subnet addressing technology seven how to divide subnets and determine subnet mask eight correlation judgment method A tutorial on subnet mask and subnetting, learn　　This tutorial requires a certain foundation (except the Master of course), it is recommended to read the previous tu

IP address management is the foundation of a successful logical design. This section describes how to develop a Scalable IP address management plan that supports Network resizing at any time. This section also describes the use and importance of key tools such as variable length subnet masks and route aggregation. It is equally important to select an appropriate routing protocol. The suitability parameters used to evaluate a routing protocol are also studied and discussed here. The different fea

IP address management is the foundation of a successful logical design. This section describes how to develop a Scalable IP address management plan that supports Network resizing at any time. This section also describes the use and importance of key tools such as variable length subnet masks and route aggregation. It is equally important to select an appropriate routing protocol.The suitability parameters used to evaluate a routing protocol are also studied and discussed here. The different feat

Ii. Expand the I P address The rapid development of the Internet is incredible. This rapid development has led to two major address challenges:* IP address depletion* Route table growth and manageability IP addressing solution:Enable more hierarchical layers in IP addresses to reduce IP address consumption and Internet route table entries. These solutions include:* Subnet Mask* Private Network Address Allocation* Network Address Translation (NAT)* Systematic addressing* Variable Length Subnet M

use is divided into four categories:　　　　1. Reserved multicast address (224.0.0.0~224.0.0.255): These IP addresses are not assigned to specific users, and are primarily allocated to multicast routing protocols. IP packets that use this multicast address are not forwarded by the router.2. Public multicast address (224.0.1.0~224.0.1.255): These multicast addresses are available worldwide and can be used directly on the Internet, as well as applications and purchases.3. Temporary multicast address

This article is a computer class of high-quality pre-sale recommendation >>>>"TCP/IP Fundamentals"Editor's recommendationThis book is an educational training and certification exam material for network engineers, as well as a textbook or reference book for courses related to undergraduate and higher vocational colleges, and is also available to network technicians and managers as well as network enthusiasts.Content IntroductionThis book is the 4th Book of the Network Engineers ' Education series

mechanisms: horizontal segmentation, toxicity reversal, defining the maximum number of hops, transient update, and restraining timing. Horizontal segmentation is a rule used to prevent the generation of routing loops. The rule here refers to the routing information learned from an interface and will not be sent from this interface. The RIP Protocol is divided into version 1 and version 2. Both version 1 and Version 2 have the following features: 1. is the distance vector routing protocol; 2. us

: 255.255.0.0Class C: 255.255.255.0Concept:IP Address: IP address, used in an IP network, the only identification of a device, the IP address consists of 32-bit 2 binary number, this 32-bit binary number can be divided into the network and the host two parts of the subnet mask. These 32-bit binary numbers are divided into 4 bytes (one byte equals 8 bits)10.1. 23.19 (10 binary)00001010 00000001 00010111 00010011 (2 binary)The decimal number for each byte is 0-255, or binary 00000000-11111111Addre