ccna basics

Transport Layer: two important agreements TCP and the UDPTcp: Connection-oriented protocol: to establish a connection (three handshake of TCP) before transmitting user data Error checking Packet serialization Reliability

After learning rip, we know some basic routing protocols for routing, and now let's get to know a private protocol for Cisco: EIGRPEIGRP Routing Protocol(also known as Enhanced Internal Gateway Protocol Enhanced Interior Gateway Protocol)It is a

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OSI seven-layer model Application LayerPresentation LayerSession LayerTransport Layer Core LayerNetwork Layer aggregation LayerData Link Layer Access layerPhysical LayerFirst, the physical layer1. Transmission unit: bit bitstream2. Device NIC,

Switch port configurationA LAN switch is an intermediary device that provides interconnection for each segment of a network. Therefore, the physical interface on the switch does not have an IP address. The physical interfaces on the routers are

The main learning is the Cisco Internetwork Operating System (IOS) software and the configuration files for routers and switches. This includes accessing and using the IOS CLI mode and configuration process, as well as understanding the meaning and

1. Static route with one jump: -----------------------R1---------------------------- R1 (config) #ip Route 2.2.2.0 255.255.255.0 12.1.1.2 R1 (config) #ip Route 23.1.1.0 255.255.255.0 12.1.1.2 R1 (config) #ip Route 3.3.3.0 255.255.255.0 12.1.1.2

Concept: 1. Neighbor table: The address of the direct-attached router and the interface to which it is connected 2. Topology table: A. Routing Status: P (passive) a (activity) B. Feasible distance (FD): Minimum metric to destination (metric) C.

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Thinkphp basics (2) and thinkphp basics. Thinkphp basics (2). thinkphp basics section 1 describes thinkphp basic paths, and Section 2 describes common thinkphp usage (M layer and V layer) we will first create thinkphp basics at the Controller layer (2) and thinkphp

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Day 1 Computer basics, day Computer BasicsComputer Basics 1. Why learning computer basics? The role of programming languages: commands that humans use to make machines understand and act. It is similar to English in human society. Relationship: Computer Hardware-Operating System (OS)-software (finished programming language, learning results ). Hardware: There is

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Android Basics Getting Started tutorial--7.6.1 Socket Learning Network Basics Preparationtags (space delimited): Android Basics Getting Started TutorialIntroduction to this section: To take care of beginners who have not learned Java sockets, or to smooth out the concepts related to network protocols involved in Android development,After all, the intervi

JavaScript language basics 1: javascript language basics We need to know what JavaScript is. First, we need to know what features JavaScript has? What is JavaScript? It is an object-based and secure scripting language! It is a scripting language. Therefore, it has the following features: 1) It is a scripting language and an explanatory language. It is interpreted line by line during the program running. 2

JavaScript language basics 3: javascript language basics JavaScript can process data types from the real world, such as numbers and text. At the same time, JavaScript also contains some Abstract data types, such as object data types. JavaScript is a weak type language. In many cases, when we process data, we do not need to declare the data type. Their types have been calculated. Since JavaScript is a weak t