ip getter

Reference Original address: http://www.cnblogs.com/JuneWang/p/3917697.htmlIP Address:IPv4IP address = network number + host numberSubnet Mask:A subnet mask is a basis for determining whether the IP addresses of any two computers belong to the same subnet . The simplest understanding is that the respective IP addresses of the two computers and the subnet mask after the and operation, the result is the same,

First, explain the concept of "intranet" and "Extranet": Intranet: That is to say the LAN, such as the school's local area network, the local area network each computer IP address in this local area network has the mutual opposite sex, is not repeatable. But the intranet IP in two LAN can have the same. Extranet: That is, the Internet, LAN through a server or a router external connection network, this

operating system and protocol software to manage the main tasks related to the network access layer. The modularization of the protocol stack enables software components in the network access layer dealing with hardware to provide interfaces for the upper layers unrelated to hardware. Network access layer and OSI model-- The physical layer in the OSI model is responsible for converting data frames into bit streams suitable for transmission media. The data link layer completes two independent ta

The IP protocol is the most important protocol in the family of TCP/IP protocols, which provides unreliable, non-connected datagram transport services. So understanding IP protocols is critical to our learning network.IP headerImportant Field Introduction：4bit First ministerial degree: in 4 bytes, determines the IP hea

International regulations: divide all IP addresses into A, B, C, D, and E. Class DefaultSubnet Mask: Class A is 255.0.0.0; Class B is 255.255.0.0; Class C is 255.255.255.255.0. The subnet mask is a 32-bit address. It is used to shield a part of the IP address to distinguish the network ID and host ID, and shows whether the IP address is on the LAN or on a remote

Version (4bit) Header Length (4bit) Priority and service type (8bit) Total Length (16bit) Logo (16bit) Logo (3bit) Segmented offset (13bit) Survival Period (8bit) Protocol (8bit) Header Checksum (16bit) Source IP address (32bit) Destination IP address (32bit) Option (0 or 32bit, if any) Dat

How To Disable IP address modification and prevent lan ip conflict attacks on LAN computersHow can I prevent LAN computers from modifying IP addresses and preventing LAN IP conflict attacks? The author believes that it can be implemented through the following channels:Method 1: Disable

Jsp to obtain the Client ip address. jsp to obtain the Client ip Address This example describes how to use jsp to obtain the IP address of a client. We will share this with you for your reference. The details are as follows: Public static String getIpAddr (HttpServletRequest request) {String ip = request. getHeader (

How PHP prohibits access to an IP or IP address segment This article mainly introduces the PHP prohibit IP or IP address segment access method, involving the server variable $_server, file and string operation skills, with a certain reference value, the need for friends can refer to the next The example of this art

network layer is responsible for routing, grouping and reorganizing the data between the subnets. The unit of data transfer in this layer is the packet (packet) (this packet can is either an IP datagram or a fragment of the IP datagram). The specifications that belong to this layer are IP, IPX, RIP, OSPF, ICMP, IGMP, and so on. Devices that are actually in use,

for many friends who have just come into contact with Linux, how to set the IP address of the Linux system, as the first step, the following small series of CentOS system as an example, to show you how to set the IP address of the CentOS , how do I modify the Linux system IP address? Linux systems, CentOS View

is with IP conflict resolution This situation is mainly due to other computers under the router is also using your computer's IP address, resulting in IP address conflicts, there is no access to the Internet and so on. The main reasons for this situation are: 1, the local computer uses the 192.168.1.1 IP address, an

The lan ip Address becomes the IP Address of the WAN and implements nat (Port ing) on the router. First, we will introduce some basic concepts: NAT (Network Address Translators) and Network Address Translation: network Address Translation is generated when IP addresses are increasingly lacking. Its main purpose is to reuse IP