disadvantages of ipv4 have gradually been exposed, that is, the network number occupies too many places, and the number of hosts is too small, so the host addresses it provides become increasingly scarce, currently, in addition to using the reserved IP address to allocate nat addresses within an enterprise, a high-class IP address is usually divided to form multiple subnets for use by different user groups.This is mainly to effectively use the IP address in the case of network segmentation. By
subnet can be "directly" interoperable. So how do you determine the subnet mask?Referring to the IP address sub-network number and host number, to divide a network into multiple subnets, so the network number will occupy the original master, for example, for a class C address, it uses 21 bits to identify the network number, to divide it into 2 subnets will need
subnet has 10 hosts, then for this subnet will need to 10+1+1+1=13 IP address. (Note that the first 1 is the gateway address required for this network connection, and the next two 1 refer to the network address and broadcast address respectively.) 13 is less than 16 (16 equals 2 4), so the host bit is 4 bits. And 256-16=240, so the
As we all know, IP is made up of four numbers, here, let's first look at the Class 3 commonly used IPClass A IP segment 0.0.0.0 to 127.255.255.255Class B IP segment 128.0.0.0 to 191.255.255.255Class C IP segment 192.0.0.0 to 223.255.255.255 The default subnet mask assigned by XP is only 255 or 0 per segmentClass A default subnet
IP address, subnet mask, network number, host number, network address, host address, IP address
IP Address: 4-segment decimal, 32-bit binary, for example, 192.168.1.1 binary is: 11000000 | 10101000 | 00000001 | 00000001The subnet mask shows how many bits are the network numb
subnet can be "directly" interoperable. So how do you determine the subnet mask? Referring to the IP address sub-network number and host number, to divide a network into multiple subnets, so the network number will occupy the original master, for example, for a class C address, it uses 21 bits to identify the network number, to divide it into 2 subnets will need
principle is very simple, using the ARP protocol to broadcast their own IP address to the network, if the response there is an IP conflict, this function in the tcp/ The first volume of the IP protocol ARP protocol chapter is described in detail. This first uses the ping command to probe the set IP address, and then in the ARP cache to find out if there are valid records, if any, there is an IP conflict. There is no need to care whether the ping command succeeds, whether or not it succeeds, as
be set according to certain rules. Same as the IP address, the subnet mask length is also 32 bits, the network bits on the left are represented by the binary number "1", and the host bits on the right are represented by the binary number "0. As shown in the following figure, the IP address is "192.168.1.1" and the subnet mas
, 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 network, that is, regardless of the hardware with this address (such as network cards, hubs, routers, etc.) access to the network where, it has the same MAC address, MAC address is generally immutable, can not be set by the u
are represented by the binary number "0. As shown in the following figure, the IP address is "192.168.1.1" and the subnet mask is "255.255.255.0. Among them, "1" has 24, representing the corresponding 24-bit IP address on the left is the network number; "0" has 8, the eight-digit host number on the right of the corresponding IP address. In this way, the
subnet can be "directly" interoperable. So how do you determine the subnet mask?Referring to the IP address sub-network number and host number, to divide a network into multiple subnets, so the network number will occupy the original master, for example, for a class C address, it uses 21 bits to identify the network number, to divide it into 2 subnets will need
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
Transferred from: http://www.cnblogs.com/JuneWang/p/3917697.htmlIn order to learn more about the TCP/IP protocol, recently read a lot of relevant information, collected and recorded as follows, for later use and convenient for you to learn:IP address, subnet mask, default gateway, what does DNS server mean?(a) Problem analysis001. Q: IP address, subnet
PS: found a good article on the Internet, carried over, in case you can't find it later. At the same time the individual made a simple change. IP address, subnet mask, default gateway, what does DNS server mean?(a) Problem analysis001. Q: IP address, subnet mask, default gateway, DNS server, what is the difference? I k
What is a subnet mask? The subnet mask, also known as a netmask, address mask, and subnet mask, is a way to indicate which bits of an IP address identify the host's
contiguous respectively. The length of the subnet mask is also 32 bits, the left is the network bit, with the binary number "1", the number of 1 is equal to the length of the network bit, the right is the host bit, with the binary number "0" means that the number of 0 equal
In order to learn more about the TCP/IP protocol, I have read a lot of relevant information recently and collected the following records for later use and convenience:
What does IP address, subnet mask, default gateway, and DNS server mean?
(1) Problem Analysis
001. Q: What is the difference between IP address, subnet mask
and one to distinguish between.
According to 255.255.0.0 (11111111,11111111,00000000,00000000), the front of the 16-bit is the network number, according to the subnet mask is based on the longest match, then now in the 17-bit 0 and one-zone divided into two. Then you can divide the
Subnet Mask and IP address calculation network address and broadcast address conversion
IP Address: 202.112.14.20.Subnet Mask: Too Many Subnet MaskWhat is the network address and broadcast address of this host?Solution:Step 1: Determine the network
places, while the number of hosts is too small, therefore, the host addresses it provides become increasingly scarce. Currently, in addition to using NAT to allocate reserved addresses within an enterprise, a high-category IP address is usually further divided, to form multiple subnets, which can be used by different user groups. This is mainly to effectively use the IP address in the case of network segmentation. By taking the high part of the host number as the
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