how to calculate subnet mask from ip address manually

, why calculate network addressThe bottom line is that the computers in the network can communicate with each other. First look at the simplest network, Figure 3 is to use a network cable (crossover) directly connect two computers. Here are several IP address settings to see if the network is on or off in different settings.1, set the

different networks, so it does not pass.Here is a conclusion: the computer with a direct connection to the network cable or through the hub (hub) or the ordinary switch between the computer to be able to communicate with each other, the computer must be on the same network, that is, their network address must be the same, And the host address must be different. If it is not a network will not be able to pa

, infrared, etc., sometimes referred to as physical media. The MAC address is also called the physical address, hardware address, or link address, which is written by the network device manufacturer when it is produced inside the hardware. This address is not related to the

is a private address and cannot be applied directly in the Internet. The Internet must be converted to a public address.I. Why do I need to calculate the network address?In a word, computers in the network can communicate with each other. first, let's look at the simplest network. Figure 3 uses a network cable (crossover line) to directly connect the two compute

The subnet mask cannot exist alone, it must be used in conjunction with an IP address. The subnet mask has only one function, which is to divide an IP

IP addresses, subnet masks, and gateways in network management are the basic knowledge that each network administrator must master. Only by mastering them can you really understand the TCP/IP protocol settings. The following describes what a subnet mask is.To understand what

Summary: Class A, B, C is actually the concept of address block, the so-called application of a class C address, refers to the application of a Class C address block. C class Address block of specific IP address of this class C

): Network address + host address =192.168.100.1Broadcast address: 192.168.100.255How are these addresses calculated? Why calculate these addresses? To know how, first to understand a truth, the purpose of learning Network is how to make the network of computers communicate with each other, that is, around the word "to

Question: If a company has 100 computers and a class C registered IP address segment: 218.102.142.0, its Intranet (LAN) needs to be further divided into two subnets, each with 40 computers and 60 computers, Requirements: (1) Specify the subnet mask; (2) assume that the IP