what is packet tracer

What is a jar file?The jar file format is based on popular ZIP file formats and is used to aggregate many files into one file. Unlike ZIP files, Jar files are not only used for compression and release, but also for deployment and encapsulation of libraries, components, and plug-in programs, and can be directly used by

What is the TCP.IP protocol? Generally speaking, TCP/IP protocol is the Technology foundation of Internet based on TCP/IP protocol (Transmission Protocol/Inter-network protocol). Full name Transmission Control protocol/internet Protocol. The Protocol of Transmission Control Protocol/Internet, also known as network Communication protocol,

I.. what is the document of RDB? RDB is the initials of the English relational database, and the Chinese language is generally translated into relational databases. RDB file extension refers to the relational database file, which is used to specify the corresponding relatio

maintenance department?At present, we lack clear role definition and responsibility division in the operation and management process, and automated integrated operation and maintenance management platform, so that it is difficult to find the reason quickly and accurately after the problem, and the lack of necessary tracking and recording after dealing with the fault.2 . Secrets hidden behind trafficNetwork interface of the end, the size of traffic, h

enterprise is an important dimension that affects personal work and development. In a commercial society, the position of a company can be easily understood: A company with many chips has a higher right of control and a higher right of voice. Specifically, the payment is at the top, and the money is at the bottom. For example, if company a subcontract the busine

in today's network era, rub net believe many friends are not unfamiliar. But have you ever thought of such a problem: routers are hackers rub the net, the user will have what harm? Will he threaten the owner, or will he be able to hack me? or the router is connected by a malicious stranger, what can they do? Today we are going to talk about

In MPEG-4 14496-2, there is no definition of Simple Profile level 0, the smallest is simple profile Level 1, so what is simple profile level 0? As follows: I have heard of a level 0 for Simple Profile, what is it? Level

What is ping? Often a netizen asked me this question, in fact, the word ping originally originated from the sonar detection system, intended to refer to the pulse signal from the sonar equipment. In the development of the Internet, the process of detecting the connectivity between two nodes in the network is very similar to the sonar detection process, so the nam

fields to the IP datagram header ). The UDP header field consists of four parts, two of which are optional. Each 16-bit source port and destination port are used to mark the application process sent and received. Because UDP does not need to respond, the source port is optional. If the source port is not used, set it to zero. The destination port is followed by

this case is a cache overflow that occurs due to changes in the data when the clock is effectively aligned. This may require a large number of simulations and considerations for all possible input conditions to model and simulate this error behavior.Figure 1: Elastic cache block Diagram　　High-level requirementsMany companies have used assertion-based validation (ABV) technology to shorten validation times

The creation of virtual concept and the background of virtual operator In recent years, due to the rapid development of data service, voice service, video service and the improvement of communication network technology, all kinds of monopoly will be broken along with IP technology, especially VoIP technology becoming more mature and telecom opening up. The application of integrated voice, data and video services through packet networks has become mor

Typical Security Enhancement Methods 1. Access prohibited (Block) 2. Allow access (Permit) 3. Authenticate) 4. tamperproof) 5. Encryption (encrypt) IPSec is a group of protocols and services. IPSec provides a variety of security services for IP-level (that is, the network layer) communication. These security services include: Certification-who are you talking about? Who are you talkin

to the sustainable development of the Internet and long-term. At present, the Internet organization has decided to set up two specialized working groups to develop corresponding international standards. IPv6 FAQ 1. What is IP? What is IPV4? What

#-*-coding:cp936-*-#python#Xiaodeng#What is XML RPC? #Chinese called: Remote Procedure Call#RPC mechanism for Transport protocol using HTTP protocol, using XML text to transfer commands and data#an RPC system must consist of 2 parts:#1. RPC client: Used to call the method to the RPC server and receive the return data of the method#2. RPC server: Used to respond to RPC client requests, execute methods, and e

What is the difference between a WINS server and a DNS server? For many people, the relationship between the WINS server and the DNS server is still mysterious. However, we hope to clarify this matter with your question. First, DNS refers to "Domain Name Server", while WINS refers to "Windows Internet name service ". Both are used to resolve the domain name, but

What is the relationship between East-West traffic and SDN? The relationship between East-West traffic in the data center and SDN is reflected in the fact that many SDN solutions are designed to address the challenges posed by such dynamic traffic. There is no shortage in the network industry to discuss the relationsh

1. The relationship between the HTTP protocol and the TCP/IP protocolLong connections and short connections to HTTP are essentially TCP long connections and short connections. HTTP belongs to the Application layer protocol, which uses the TCP protocol at the Transport Layer and IP protocol at the network layer. The IP protocol mainly solves the network routing and addressing problem, the TCP protocol mainly solves how to reliably pass the packet over

Some of the answers collected online: The connection was maintained on state, and I understood so is actually maintaining a variable on both the client and server side, this variable maintains the current state of data transmission, such as what is being transmitted, what data is