unisys address

Transferred from: http://blog.csdn.net/ordeder/article/details/41630945Copyright NOTICE: This article for Bo Master (http://blog.csdn.net/ordeder) original article, without Bo Master permission not reproduced.Directory (?) [-] Virtual space Organization of the process virtual address 1 Virtual Space User space 2 Memory Interval Organization of the system physical address

The following is a question from readers in the technical discussion group: Q: Program When downloading to nor, the loading address in ads is 0x30000000, which is the address of SDRAM. Is it automatically handled by the debugger? A: One address is the loading address, and the other is the running

Why do you want to bind IP? Can you specify the IP can not be on the network? The reason to bind IP is because he will change the IP. For example, I am the IP on this computer is 192.168.1.11 this IP has been done in the firewall above the setting can not be online, but if I know that there is an IP is 192.168.1.30 IP can surf the internet, then I will not change the 192.168.1.11 replaced by 192.168.1.30 can be online?So the binding IP is to prevent him from changing IP. Because the MAC

, that subnet mask set how much appropriate? Let's set out a formula first.2 m-Time Square =560First, we determine that 2 must be greater than 8 square, because we know that 2 of 8 is 256, that is, the number of Class C IP maximum capacity of the computer, we from 9 times a trial 2 9 is 512, less than 560, 2 10 is 1024, it seems 2 of the most suitable. The subnet mask consists of a total of 32 bits, has determined that the next 10 bits is 0, the front 22 bits is 1, the most appropriate subnet ma

I. Basic knowledge of memory management1.S3C2440 uses a maximum of two page tables: the first-level page table is used when converting in segments, and the two-level page table is used when converting pages. There are three sizes of pages: Large pages (64KB), small pages (4KB), and minimal pages (1KB). Entries are also referred to as "descriptors", which are: segment descriptors, large page descriptors, small page descriptors, minimal page descriptors--they save large pages, small pages, startin

Ordeder original article, original link: http://blog.csdn.net/ordeder/article/details/41630945Source Version 2.4.01. Virtual Space0-3G User space 0x00000000 ~ 0XBFFFFFFF3-4G kernel space 0xc0000000 ~ 0xFFFFFFFFEach user process has a separate user space (virtual address 0-3), and the kernel space is unique (equivalent to sharing)The user space for each process is described by mm_struct, which is task_struct.mm.2. Organization of the process virtual

Changes in the source IP address, destination ip address, and MAC address of a data packet during route forwarding. Does the source ip address, destination IP address, source MAC address, and destination mac change? A -- (B1-B2) -

In fact, I have never used a 10-bit address or a universal broadcast address. the general broadcast address should be used for communications between multiple MCU using I2C. although it is useless, it is still translated and may be used in the future: 10bit address: the number of addresses that can be extended by 10bit

on the motherboard varies with the physical memory size. However, the linear space provided for application programmers is fixed, it does not change with the physical memory, so as to ensure the portability of applications. Although the size of the physical memory can affect the performance of the application program running, and in many cases there is a minimum requirement on the size of the physical memory, these factors are only for the normal operation of an OS.The size of the linear space

Description: Each socket address structure should be implemented in network programming. So the main socket address structure after the premise network planning, address structure can be sent in two directions: from the process to the kernel and kernel processing. Conversion between binary values in the structure.Most socket functions require a pointer to the soc

Http://blogold.chinaunix.net/u1/43206/showart_518836.htmlSocket INADDR_ANY listens to the 0.0.0.0 address. The socket only binds the port so that the route table decides which ip address to transfer.INADDR_ANY indicates the address 0.0.0.0. In fact, this address indicates an uncertain

MAC (Medium/media Access Control) address is for the network card, the manufacturer in the production process, the network card in its EPROM burned in a group of numbers, this group of numbers, each net card is different, this is the MAC (physical) address of the network card. That is to say: A network card corresponds to a unique MAC address. 　　The difference b

In WEB applications, it is also very common to locate and record access logs based on IP addresses. in ThinkPHP, you can easily obtain and locate ThinkPHP IP addresses. Can be in the official website http://www.thinkphp1.cn/extend/223.htmldownload ippositioning extended class library, download package (http://www.thinkphp1.cn/down/253.html) has also included the extension class. If the upload class Library is downloaded separately, put the decompressed IpLocation. class. php in the ThinkPHP/Ex

In WEB applications, it is also very common to locate and record access logs based on IP addresses. in ThinkPHP, you can easily obtain and locate IP addresses at http://www.thinkphp1.cn/extend/223.html) it also contains the extension class. If the upload class Library is downloaded separately, put the decompressed IpLocation. class. php in the ThinkPHP/Extend/Library/ORG/Net/Directory (if not, manually create it. 1. obtain the IP address If you only

We know that the IP address is a 4-byte (total 32bit) number, divided into 4 segments, 8 bits per segment, and periods separated by a period. For ease of expression and recognition, the IP address is expressed in decimal form such as 210.52.207.2, each paragraph can represent the maximum number of decimal not more than 255. The IP address consists of two parts, t

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 i

1 Basic ConceptsAn IP address is an Internet protocol address, each Internet package must have an IP address, and each Internet service provider (ISP) must request a set of IP addresses from the organization concerned, and then generally dynamically assign it to its users.The MAC address is the

What is an IP address? IP address This word has been heard many times but has been unclear what exactly is, only know that the computer Internet to IP address, in order to understand this problem, small compiled a lot of information, the following to share with you. There are millions of hosts on the Internet, and in order to differentiate these hosts, each host

In the campus network, the most convenient way to make trouble is to steal someone else's IP address, the computer that is embezzled IP address not only can not use the campus network normally, but also will frequently appear the IP address is occupied the prompt dialog box, to the campus network security and the user application brings the extremely hidden dange

Tag:httpioosarsp Data divon code The Http://baike.baidu.com/view/69334.htmMAC (Media Access Control) address, or MAC location, is used to define the locations of network devices. In the OSI model, the third layer of the network layer is responsible for the NBSP;IP address, while the second layer of data link is responsible for MAC addresses. Therefore, a host will have an IP