how to subnetting

Read Catalogue I. IP Address Basics 1.1 IP Address structure and classification 1.2 special IP address 1.3 subnet mask 1.4 IP address request two. subnetting 2.1 subnetting Concept 2.2 Class C sub-network Division 2.3 subnetting Step 2.4 subnetting Case 2.5 sub-division Network considerations 2.6 Why

IP addresses are classified into five categories--------------------------------------------------------------------------------------------------------------- ----------------------------------------------------the meaning of the subnet mask and subnetting according to the subnet maskThe subnet mask is used to divide subnets. For example, a Class A network can hold 16777214 hosts. However, in practice, it is impossible to use a class A network only f

address: 32-bit00000000 00000000 00000000 00000000Broadcast address:11111111 11111111 11111111 11111111Example of subnetting:1, a company to apply to a class C IP address, but to connect 6 subsidiaries, the largest one sub-The company has 26 computers, each subsidiary in a network segment, the subnet mask should be set to?A: Assume that the C network address is 192.168.0.0/24,6 subsidiary, namely Divide 8 subnets, two not, each subnet can hold 30 IP1

the host location, and then determine the network bit based on the host bit, and finally determine the detailed IP address.① determining the host bitSet the number of hosts that you need to be arrogant and small: 101/54/2, and then determine the host bit for each subnet based on the number of IP IPs the network has: if 2 n times -2≥ The IP number of that segment, then the host bit equals N. So, get: 7/6/2.② determines network bit based on host bitWith 32 minus the host bit the remaining value i

representation:10101100.00010000.0000010.10000000Mask: 255.255.255.192Represents 26 bits in binary:11111111.11111111.1111111.11000000The IPV4 host address range provided is:172.16.2.129 to 172.16.2.190, broadcast address is 172.16.2.191.The result is a 62 unique IPV4 address for the administrator LAN.WANThe last network segment is a WAN connection and requires 2 host addresses. Support WAN links with just 2 primary seats. 2^2-2 = 2.This leaves 8 bits to define the local subnet address. The next

used in multicast (multicast). Class E:the first four bits of IP must be 1111, The network address is: 1111 0000-1111 1111, reserved for future use.Second, Sub-network division in the actual application, a company applied for a public network, such as 201.1.2.0/24, but the company has two groups, a group of the number of hosts is 6, the number of hosts in the other group is 4, and do not want the two groups of hosts to communicate with each other, if you apply for a public network , the cost is

network ID, we can write the subnet mask right away. So how do we calculate for 1000 0000,1100 0000 and 1110 0000? 27=8 is 1000 0000=128,1100 0000=128+64,1110 0000=128+64+32, so we do not need to remember how much each, only need to do a simple addition and subtraction to take care of the subnet mask calculation. Network ID Results We all know that the network ID part is unchanged, the host ID portion becomes 0, then in the calculation of the network ID, first look at how many bits in the subn

11111111 11111111 10000000 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 hosts 1 255.255.255.128 128 126 2 255.255.255.192 64 62 3 255.255.255.224 32 30 4 255.255.255.240 16 14 5 255.255.255.248 8 6 6 255.255.255.252 4 2

First, a sample from a Shehiren teacher's book is referenced:Host H1 the process of sending packets to H2:First, with the subnet mask in the subnet:255.255.255.128 and target host H2 IP address:128.30.33.128 and get network number: 128.30.33.128. Obviously this does not match the network number of Subnet 1:128.30.33.0.The datagram is then forwarded by the default route R1 Subnet 1. At this point, R1 will look for its own routing table. Think of the host address and subnet mask of the H2, and whe

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 Subnet Partitioning First, before we learn about subnetting, let's review the knowledge of IP addresses and learn about public and private IP addresses: There are millions of hosts on the Internet, in order to differentiate these hosts, each host is assigned a dedicated address, called an IP address. The Internet IP address is unified by the NIC (Internet Network information Center) for the planning and management of global addresses, while I

-Times of Nnet≤2。 For example, if the number of subnets Nnet is 10, then select the length value of the SubnetID field to x=4,2 4 times=16, which is larger than the maximum number of subnets that may be used 10, meets the requirements.2) Select the length value y of the HostID field, and ask for the Y-order of the Nhost≤2。 For example, if the number of subnet hosts is nhost to 12, select the length value of the HostID field to y=4,2 4 times=16, which is larger than the maximum number of possible

IntroductionThis article describes what the IP address and its function and IP address composition, IP address classification, IP subnet partition, subnet mask, public address, private address,VLSM (variable eldest son netmask), CIDR (Non-class inter-domain routing) and other CCNA basics.Article Directory0x1. What is an IP addressthe role of the 0X2.IP address0x3.ipv4 Address Composition0x4.ipv4 Address CategoriesA. Reserved IP addressB. Private IP addressc. Special IP address0x5.ip Sub-network

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

IP subnetting and variable length subnet masks (vlsm) Subnetting Basics Advantages of subnetting: 1. reduce network traffic 2. Improve Network Performance 3. simplified management 4. Easy to expand geographic scope How to creat subnets How do I divide subnets? First, you must note that the power of 2: The power of 2 0 to the power of 9 are: 1, 2, 4, 8, 16, 32, 64

1. From level two IP address to level three IP address:* * Level Two IP address design unreasonable:The utilization of ①IP address space is sometimes very low;② assigns a network number to each physical network, which causes the routing table to become too large and thus causes the network performance to become worse;③ level Two IP address is not flexible;2. subnetting: Since 1985 a "Subnet Number field" has been added to the IP address so that the le

-tailored to the network of less than 254 hosts!Default Mask:Class A: 255.0.0.0Class B: 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

class B address is used, only 500 of the 60,000 + host addresses are used, resulting in a 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 corr

make better use of the existing IP address resources and reduce waste, the IP address can be further divided into smaller networks, that is, sub-network division. In order to create subnets, the host in the mask needs to be partitioned into network bits, a process that is often called borrow or leased.After subnetting, the subnet mask of the IP address is no longer a mask with a standard IP address, and the IP address can be divided into two classes:

Theoretical learningproblem 1 : How does the switch work? By learning the computer MAC address of each interface, it realizes the data communication of each computer, and the routing table of the router is similar, the switch is realized by the Mac-port mapping table.problem 2 : Two layer switch, three layer switch, router difference? Two-layer switch: For switching, LAN, WAN switching onlyLayer Three switch: Also known as the routing switch, with the dual functions of routing and switching, onl