itil fundamentals

20145239 "Information Security system Design Fundamentals" The 7th Week study summary textbook Learning content Summary6.1 Storage Technology6.1.1 Random access memory (divided into two categories)Static RAM (SRAM): Fast, as cache memory. (hundreds of thousands of MB)Dynamic RAM (DRAM): As main memory, the frame buffer of the graphics system. (1. static RAMWith a dual stable state , it can be kept for a period of two different voltage configurations (

20145216 Shi Yao "Information Security system Design Fundamentals" Seventh week Study summary teaching Contents summary Sixth chapter memory hierarchyA memory system is a hierarchical structure of storage devices with different capacities, costs, and access times.CPU registers, cache memory, primary storage, disk.The first section of storage technologyOne, random access memory (RAM)1.RAM classification: Static sram-faster, more expensive, as

User and group Management fundamentals Brief introductionIn Linux systems, user management is the allocation of resources based on user name and password user category: User id: userid,uid16bits binary number: 0-65535 admin: ID number is 0,------as long as 0 is Admin user Ordinary user:1-65535 System users: 1-499 (centos6), 1-999 (centos7) login User: 500-60000 (CentOS6), 1000-60000 ( CENTOS7) name resolution: Name translation Usernamecategorie

20165230 2018-2019-1 "Information Security system Design Fundamentals" The second week study summary of learning Contents There are two general rules for arranging the bytes of an object: The small-end method (least significant byte at the front) and the big-endian (the most significant byte in front). The expression x>>k will shift the X arithmetic right to K (the left side complements the K-effective bit) and the x>>>k will make a logical (lef

2018-2019-1 20165334 "Fundamentals of Information Security system Design" Third week study summary and Buffer Overflow Vulnerability experiment One, instruction learning gcc -Og -o xxx.c learns to -Og tell the compiler to use an optimization level that generates machine code that conforms to the overall structure of the original C language code. gcc -Og -S xxx.cLearning ( -S option to view compiled code generated by the C language compiler) gcc -Og -c

2018-2019-1 20165230 "Fundamentals of Information Security system design" The third week study summary of learning Contents The actual implementation of the memory system is to combine multiple hardware memory and operating system software. How valid addresses are calculatedImm(Eb,Ei,s) = Imm + R[Eb] + R[Ei]*s ISA: Instruction set architecture, which defines the state of the processor, the format of the instruction, and the effect of

NGS Fundamentals-High throughput Sequencing principlesOriginal: Bibi target sheng Singbaodeng 2017-07-23 The NGS series includes five parts: NGS Foundation, transcriptome Analysis, chip-seq analysis, DNA methylation analysis, and re-sequencing analysis.NGS Basic series articles include high-throughput sequencing principles, sequencing data acquisition and quality assessment, common file format interpretation and Conversion 4 parts.This paper (high-t

-2018-2019-1 20165206 "Information Security system Design Fundamentals" 4th Week Study summary-Textbook learning content Summary Programmer-Visible state: Each instruction in the Y86-64 program reads or modifies portions of the processor state, which is known as the programmer's visible state. Includes: program register, condition code, program status, program counter, and memory. Y86-64 directive: The y86-64 instruction is a subset of th

20145317 "Information Security system Design Fundamentals" 9th Week Study Summary 1Summary of learning contents of textbook 10.1 Unix I/O A UNIX file is a sequence of M bytes (b0b1b2 ... BM-1). All IO devices, such as networks, disks, and terminals, are modeled as files, and all inputs and outputs are executed as read and write to the corresponding file. 2. All inputs and outputs are treated as a unified approach:1) Open the file. An applicat

-2018-2019-1 20165206 "Information Security system Design Fundamentals" 3rd week Study summary-Textbook learning content Summary Program code: The GCC command invokes a complete set of programs to convert the source code into an executable file.First, the C preprocessor expands the source code;Second, the compiler produces the source file assembly code;The assembler then converts the assembly code into a binary target code file;Finally, the l

Clustered Data ONTAP Fundamentals Course Learning (Introduction)NetApp learningcenter Clustered Data ONTAP Fundamental the course mainly introduces Clustered Data ONTAP the advantages of the system, through learning can understand Clustered Data ONTAP the architecture and functions of the system, master the basic management operations, including: installation, configuration and management. By studying this course, you can master the following skills:(

multiprocessor architectures. The interface was initiated by SGI Corporation.Includes the compilation guide, the execution function library and the environment variable three parts, has the serial equivalence (whether using one or more threads to execute a program, all bring the same result, easier to maintain and understand) and incremental parallelism (the processor starts with a serial program, and then looks for those snippets that are worth parallelization).The execution model of Openmpi i

20145306 "Fundamentals of Information Security system Design" 14th Week study summary textbook Learning content Summary physical and virtual addressingPhysical addressing: The main memory of a computer system is organized into an array of cells consisting of m contiguous byte sizes. Each byte has a unique physical address of Pa. The address of the first byte is 0, the next byte has an address of 1, the next is 2, and so on. Given this simple structure

by Visio Studio, enable OpenMP to be seen as a parallel program or as a serial program, or to make it easy for a user to rewrite a serial program as a parallel program while keeping the serial program part intact.–mapreduce–Google,pagerank the construction of the inverted table index. Map inputs input into the middle of the key/value pair, reduce the Key/value synthesis final output.–hadoop–Open source version of MapReduce. Hfds,namenode (Jobtracker), DataNode (tasktracker), cluster architectur

20145317 "Fundamentals of Information Security system design" 13th Week study summary textbook Learning content Summary Network programming client-server programming model An application consists of a server process and one or more client processes Server process, manage some kind of resource, by manipulating this resource to provide a service to its clients Basic operations: Transactions A client-server transaction consists of fo

. Contains the compilation guide, the Run function library and the environment variable three parts, has the serial equivalence (whether using one or more threads to run a program, all results in the same result, easier to maintain and understand) and incremental parallelism (the processor starts with a serial program, and then looks for those snippets that are worth parallelization). Openmpi's execution model adopts the Fork-join form, that is, the main thread, which reduces the difficulty and

LESSON10: Fundamentals of Network programmingNetwork programming is an important branch of computer programming, is the basis of network communication, network programming is mainly used in the Windows system system provides socket. Network communication is also divided into TCP-based and UDP-based two kinds. This paper mainly explains the basic knowledge of network programming based on TCP and UDP.1. TCP-based socket programming1.1 TCP Server#include

20145216 20145330 "Fundamentals of Information Security system design" a familiar experimental report cover for the Experimental development environmentExperimental content1. Connecting the ARM Development Board2. Build HyperTerminal3. Start the experimental platform4. Modify the IP of the XP system and the Redhat virtual machine so that they are in the same network segment as the IP of the arm machine5. Installing the ARM compiler6. Configure Environ

# 20145301 "Fundamentals of Information Security system Design" 5th Week study Summary# # Textbook Learning Content Summary* X86 addressing mode through three generations:1 The flat mode of the DOS era, not distinguishing between user space and kernel space, very insecure2-8086 segmented mode3 IA32 Flat mode with protected mode* CPU contains a set of 8 registers that store 32-bit valuesstored integer data and pointers: EAX,ECX,EDX,EBX,ESI,EDI,ESP,EBP.

2018-2019-1 20165316 "Information Security system Design Fundamentals" the second week to summarize the learning contents of the teaching materials Small end, low address to low, high address to high; You can determine the size and end type of a machine by forcibly extracting a byte of storage from either the cast or union. A logical operation has only 0 or 12 results, while bit-level operations are bitwise-processing. Round to even r