basic computer programs

family. For example, the family names of the famous CIH virus are unified "CIH ", in addition, the family name of the recently popular wannacache worm is "Sasser ". A virus suffix is a variant of a virus. It is used to distinguish a variant of a specific family of viruses. Generally, 26 letters are used for representation, such as Worm. sasser. B Refers to B, a variant of the worm, which is generally referred to as "B variant" or "B variant ". If the virus has many variants (It also indicates t

program are not one by one corresponding. A program can be loaded into memory multiple times, becoming multiple simultaneous processes, such as opening multiple terminal windows at the same time, each running a shell process, and their corresponding programs are/bin/bash files on disk. The operating system (OperatingSystem) itself is also a piece of program that is saved on disk, and the computer executes

corresponding request to the client's 5000 port. Then use the IP address of the IP layer to find the destination.3) The client's network layer is not related to the application layer or the transport layer of things, the main thing is to find the routing table to determine how to reach the server, during the period may pass through a number of routers, these are done by the router, not too much description, is simply to find the route table to reach the server through that path.4) The link laye

explained and displayed, or even the end of the string is unknown. So how can we retain the encoding flag to indicate the encoding of the string? There are some basic methods.For example, add the following content to the form header: Content-Type: text/plain; charset = "UTF-8" For a web page, the web server sends an HTTP header similar to Content-Type along with the web page itself.(Not in HTML, but as a response header sent before the HTML page) The

address. The client browser initiates an HTTP session to 220.161.27.48, and then encapsulates the packet via TCP, which is entered into the network layer.2) in the client's transport layer, the HTTP session request into the message segment, add the source and destination port, such as the server use 80 port to listen to the client's request, the client by the system randomly select a port such as 5000, and the server to exchange, the server to return the corresponding request to the client's 50

, the main thing is to find the routing table to determine how to reach the server, during the period may pass through a number of routers, these are done by the router, not too much description, is simply to find the route table to reach the server through that path.4) The link layer of the client, the packet is sent through the link layer to the router, through the neighbor protocol to find the MAC address of the given IP address, and then send the ARP request to find the destination address,

the destination.3) The client's network layer is not related to the application layer or the transport layer of things, the main thing is to find the routing table to determine how to reach the server, during the period may pass through a number of routers, these are done by the router, not too much description, is simply to find the route table to reach the server through that path.4) The link layer of the client, the packet is sent through the link layer to the router, through the neighbor pr

graphics is necessary, in addition to today many CPUs are built into the core graphics card, if there is no large game requirements, rely on the CPU built-in core graphics can meet the You don't need to match a standalone video card. In layman's parlance, the video card is equivalent to the human eye, without which the computer will not be able to drive the display screen. Memory: Memory belongs to the CPU and other hardware communication bridge, de

First, the purpose of the experiment 1. Master the concept of network topology structure. 2. Understand the main factors to consider when choosing a network topology. 3. Recognize several common network topologies. 4. Master the basic methods of accessing information by using a browser to access the Internet.Second, the content of the experiment 1.Understand the software and hardware information of the network used in the experiment; 2.Draw the networ

limit.m68k: Motorola also produces CPUs.PowerPC later Apple and IBM Motorola developed a CPU that was nearly as close as power.Linux now supports all of these CPUs, which is the open source advantage of Linux.The concept of the operating system:The CPU can only run one program at a time. But what we're seeing is really like running many programs at the same time. The computer was very fast, but the input a