I. Virtualization
(one) the classification of virtualization technology 1, platform virtualization is usually said virtualization. The operating system running on the host is called the main operating system. The operating system of a virtual machine is called the client operating system.
1) A full virtualization vm simulates a complete hardware environment. The operating system or various system software can run in it without any modification at all. VMware is available.
2) The operating system of the hypervirtualization VM has been rewritten to access hardware interfaces. Paravirturing can significantly improve performance by eliminating the need to generate additional exceptions and simulate part of the hardware execution process.
3) Hardware-assisted virtualization The OPERATING system of a VIRTUAL machine directly deals with all hardware. The VM operating system is automatically and completely isolated from the host operating system execution environment.
4) Some virtualization operating systems must be modified to run on virtual machines.
5) Operating system-level virtualization Lightweight virtualization technology. Separate different processes by creating multiple virtual operating system instances (kernels and libraries). Processes in different instances are completely unaware of each other’s existence.
2. Resource Virtualization Virtualization of specific resources, such as memory and network resources
3, application virtualization simulation, simulation, interpretation technology, etc
(2) Virtualization mode 1, a single resource multiple logic means a machine multiple VMS
2. Multiple resources A single logic means that multiple machines form a VM
3. Providing a single logical representation between multiple resources means that multiple copies can provide complete services externally. Like load balancing.
4. A single logical representation of a single resource such as a WEB server
5. Compound or layered virtual
Cloud computing cloud computing is an Internet-based computing method whereby shared hardware and software resources and information can be provided to computers and other devices on demand. Cloud is actually a metaphor for the network and the Internet. The core idea of cloud computing is to centrally manage and schedule a large number of computing resources connected by networks, forming a computing resource pool to provide on-demand services to users.
Generally speaking, the network that provides resources is the cloud. Resources in the cloud are like running water and electricity, which are easy to access and cheap. Except instead of water pipes and power lines, it travels over the Internet. Before the cloud, IT resources were like the power of a single generator; After the clouds, there is electricity from power plants.
1 (a) the characteristics of cloud computing, improve the equipment capacity 2, distributed computing resources integration capability of disaster data center to ensure system, software and hardware isolated reduce dependency 4 high scalability, platform modular design reflects the 5, virtual resource pool to provide flexible services 6, on-demand paid to reduce the cost
(2) Types of cloud computing 1. Software as a Service (SaaS) 2. Platform as a Service (PaaS) 3.
Cloud computing applications 1. Cloud security 2. Cloud storage 3. Cloud call Call center based on cloud computing 4
The Internet of Things is an Internet that connects things. On the one hand, the core and foundation of the Internet of Things is still the Internet, which is an extended and expanded network based on the Internet. On the other hand, this kind of extension and extension reaches the object to object, carries on the information exchange and the communication.
1. The perception layer is used to identify objects and collect information.
2. The network layer transmits information
3, the application layer to achieve extensive intelligence
1. Radio frequency identification technology 2. Two-dimensional code technology 3.
4, M2M Machine to Machine/Man to Machine/Machine to Man Data from one terminal to another terminal, man-machine dialogue, machine-machine dialogue.
(iii) The application of the Internet of Things