subnetting and supernetting

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

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

addresses: "192.168.5.253/30, 192.168.5.254/30"Broadcast address: "192.168.5.255/30"quickly divide subnets to determine IPLet's take example 2 for example:The topic requires that we divide the 192.168.5.0/24 network address into subnets that can accommodate 101/54/2 hosts. Therefore, we need to determine 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

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 available address block is 172.16.2.192/30.Address: 172.16.2.192Binary representation:10101100.00010000.0000010.11000000Mask: 255.255.255.252Represents 30 bits in binary:11111111.11111111.1111111.11111100The IPV4 host address range provided is:172.16.2.193 to 172.16.2.194, broadcast address is 17

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 IP192.168.0.0-192.168.0.31/27-255.255.255.224192.168.0.32-192.168.0.63/27-255.255.255.224192.168.0

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 too high, so it is necessary to divide this network into multiple subnets. The subnet is divided by the first m bits in the host bit in the network address and the network address bits as th

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 subnet mask to represent the network, corresponding to the IP address conversion to binary only the previous few, such as 192.168.176.15/ 19, the network ID altogether 19 bits, then the network ID the first two bytes is 192.168.x.0 to change the third byte. So how do you quickly calculate the value o

subnets will need to occupy 1 bits of the original host identity bit. At this point the network number bit becomes 22 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 i

" operation with the IP address. For traditional IP address classifications, the subnet mask for Class A addresses is the subnet mask for the 255.0.0.0;b class address is the subnet mask for the 255.255.0.0;c class address is 255.255.255.0. For example, if you want to divide a class B network 166.111.0.0 into multiple Class C subnets, just set its subnet mask to 255.255.255.0, so that 166.111.1.1 and 166.111.2.1 belong to different networks. As such, the method of dividing a network into multipl

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

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 hosts 12, meets the requirements.Note: A value of 0 for the HostID field indicates that the Netid,

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

: 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

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

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 part of the mask is "0".By default, if no