University:
University of California San Diego
Course:
CSE 100/101 | Data Structures and Algorithms
Academic year:

2023
Views:

205

Pages:

2
Author:

anon

Understanding Direct Addressing and Hashing: An In-Depth Guide A key stage in the hashing process and a fundamental idea in computer science and data structures is direct addressing. Direct addressing will be thoroughly explained in this article, along with how it functions and how to use it in code. What is Direct Addressing? An IP address can be transformed into a 32-bit integer number using the direct addressing technique. With the help of this conversion, a 232-dimensional array with indexes 0 through 232-1 can be produced. Each IP address will map to a distinct spot in this array, making it simple to access and manipulate data. How to Convert IP Addresses to Integers An IP address is made up of four integer integers, each of which has a maximum value of 255 and corresponds to 8 bits or 1 byte of the IP address's total size, which is 4 bytes or 32 bits. The 8 bits for the first number are joined with the 8 bits for the second number, third number, and fourth number to create an integer number from an IP address. This yields a string of 32 bytes, which may subsequently be expressed as a 32-bit integer number and translated to decimal form. Since all of the upper bits are zeroes and just the lowest bit, which corresponds to the number 1, is set, the IP address 0.0.0.1, for instance, would be converted to the integer number 1. The following formula and code can be used to convert an IP address to an integer number: Implementing Direct Addressing using Array A The IP addresses can be used to access and modify data contained in array A once they have been translated to integers. This array will be exactly 232 bytes in size and have indexes from 0 to 232-1. The entry in array A at that index is increased or decreased in accordance when a counter associated with an IP in the code is incremented or decremented. The IP is first transformed to an integer value. Direct addressing is a crucial step in the process of hashing and provides a convenient method for converting IP addresses into integer numbers. By using this conversion, data can be easily accessed and manipulated using an array of 32 size 2 . Understanding direct addressing is essential for anyone looking to delve deeper into the world of computer science and data structures.