The Intel central architecture is made up of several central control chips

Traditionally, the core of the motherboard is the north and south bridges. Northbridge is responsible for memory control and bus control. Nanqiao is responsible for the management of peripheral equipment.

Most of the corresponding motherboard chipsets of processors with integrated memory controllers (and even integrated graphics cards) are single-chip. Manage these transactions in one place.

,ich,fwh

GMCH Northbridge chips.

The ICH North Bridge is connected to the South Bridge.

FWH Southbridge Transmission Protocol.

The architecture of the network management system (referred to as network topology) is one of the important factors that determine the performance of network management. In general, it can be divided into two types of architectures: centralized and non-centralized.

Currently, centralized network management architectures typically adopt a platform-centric working model that separates a single manager into two parts: managing the platform and managing applications. The management platform is primarily concerned with collecting information and performing simple calculations, while the management application leverages the information provided by the management platform to make decisions and perform more advanced functions.

A decentralized network management architecture includes both hierarchical and distributed. The hierarchical approach adopts the concept of manager of manager (MOM), which is based on domains, and each domain has a manager, and the communication between them is through the MOM of the upper level, rather than communicating directly. The hierarchical approach is relatively scalable:

The hierarchy can be further deepened by adding a MOM level. Distributed is an end-to-end (peer-to-peer) architecture, where the whole system has multiple administrators, several peer-to-peer managers running in the network at the same time, and each manager is responsible for managing a specific "domain" of the system, and the managers can communicate with each other or coordinate through senior managers.

The choice of centralized or decentralized depends on the needs of the actual situation. The distributed network management architecture in between is a new type of positive network management architecture that has been developed recently and takes into account the advantages of both.

Concept: A set of rules, standards, or conventions established for the exchange of data in a computer network, and a protocol always refers to a layer of protocol. To be precise, it is a combination of communication rules or conventions established for communication between entities of the same layer.

Composition: The network protocol consists of three elements: semantics: involves control information for coordination and error handling; Syntax: data and controllable information formatting, coding and signal level, timing: speed matching and sequencing, etc.

Features: The network protocol has the following main functions: segmentation and reassembly; Encapsulation; connection control; flow control; error control; Addressing; multiplexing; additional services;

The hard drive that you turn will be better. If it's good, it should be the i5 machine of the acer (20111-2 months there is i5 second generation of only Lenovo or Acer,And Lenovo's machines are basically ATI graphics cards),To be honest, the cost performance of the acer is very high,If you are a game expert, then I still advise you to go to the i7 that is not much expensive,If you just want to deal with daily work,This machine seems to be very good, But the problem brought by the high configuration is whether the stability is good,And is the workmanship good。 As the old saying goes, "you get what you pay for", there are more doubts behind the cheapness.

It's very simplethinkpad,Why is Fujitsu expensive,Good workmanship,The most important thing is stability,Compared to the configuration of their poor acer base,Lenovo's machine configuration is a lot,But on the contrary, heat dissipation,Durability,The selection of material accessories is indeed the strength of these machines,And as long as the workmanship is tp,Fujitsu high-end (E,SL,L is not counted) are praised。 Moreover, a first-generation i-series configuration T410 is still more expensive than ACER, and the second-generation ASUS machine at the same price often indicates the quality of the machine. As an aside, Sandy Bridge was blown up in the quality door, and it seems that the whole line is going to be recalled to replace the motherboard, so if you want to buy it, the landlord will also be an improved version at the earliest3-4 months, that's all.

The complete information system security system framework is jointly constructed by the technical system, the organizational system and the management system.

The technical system consists of two parts: physical security technology and system security technology.

Physical security technology: the conditions of the building, computer room and hardware equipment of the information system meet the mechanical protection safety of the information system; Through selective measures for the anti-electromagnetic interference and electromagnetic leakage performance of power equipment and information system components, the corresponding safety purpose is achieved. Physical security technology is applied to the physical security environment (the physical environment that includes system components).

System security technology: Through the security selection measures or autonomous control of the operating system of the information system and security-related components, the software working platform of the information system security components reaches the corresponding security level, on the one hand, it avoids the risk caused by the vulnerability and vulnerabilities of the operating platform itself, and on the other hand, it blocks the intrusion of any form of unauthorized behavior into the security components of the information system or takes over the system management right.

The organizational system is the organizational guarantee system for information system security, which consists of three modules: organization, post and personnel.

There are three levels of organization: decision-making, management and execution.

A position is a position set by the information system security management authority to be responsible for one or several security affairs according to the needs of system security.

A personnel organization is an organization that conducts quality education, performance appraisal and safety supervision for employees who are incumbents, waiting for jobs and resigned from the posts set by the management organization.

Management system: Management is the soul of information system security. The management system of information system security consists of three parts: legal management, system management and training management. The so-called "three points of technology, seven points of management".

1) Legal management is the regulation and restraint of information system subjects and their related behaviors with the outside world in accordance with relevant national laws and regulations.

2) System management is a series of internal rules and regulations formulated within the information system according to the security needs of the country and the group necessary for the system.

3) Training management is the premise of ensuring the security of the information system.