While the main purpose of the Domain Name System is to point domains to IP addresses, a PTR record works in the opposite way - it associates an IP with a
A pointer record is a part of DNS that allows for areverse DNS lookup, thus correlating IP addresses with domain names. Depending on your operating system, you can perform a reverse DNS lookup using the DNS PTR tool or other command-line tools. When the user enters the IP address, the t...
152/168 8 Architecture Architecture-specific data address and size. 160/176 8 Global Ptr Relative virtual address of the value to be stored in the global pointer register. Size member of this structure must be set to 0. 168/184 8 TLS Table Thread Local Storage (TLS) Table address and siz...
The word size determines the address space. In programming (C/C++), the word is typically represented by the int_ptr type, which has the same length as a pointer, this way abstracting these details. Some APIs might confuse you though, such as Win32 API, because it has types such as ...
Understand what PTR records are and how they store IP addresses Related Content Dynamic DNS What is DNS? DNS records Primary vs. secondary DNS DNS Root Server Want to keep learning? Subscribe to theNET, Cloudflare's monthly recap of the Internet's most popular insights!
What is DNS? The Domain Name System (DNS) is the phonebook of the Internet. Humans access information online through domain names, like nytimes.com or espn.com. Web browsers interact through Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so browsers can load Inte...
Do you mean an IntPtr that you get from maybe a native call or Marshal.AllocHGlobal? Do you mean a GCHandle? The all are essentially the same thing - a representation of a memory address where something is stored - be it a class, a number, a struct, whatever. And for the re...
IntPtr nSize, IntPtr lpNumberOfBytesWritten );Looking at MSDN we can see that the C prototype for this function is: BOOL ReadProcessMemory( HANDLE hProcess, LPCVOID lpBaseAddress, LPVOID lpBuffer, SIZE_T nSize, SIZE_T* lpNumberOfBytesRead );There...
What a unit test is The differences between shared, private, and volatile dependencies The two schools of unit testing: classical and London The differences between unit, integration, and end-to-end testsAs mentioned in chapter 1, there are a surprising number of nuances in the definition of ...
F# 6 allows the syntax expr[idx] for indexing and slicing collections.Up to and including F# 5, F# has used expr.[idx] as indexing syntax. Allowing the use of expr[idx] is based on repeated feedback from those learning F# or seeing F# for the first time that the use of dot-...