Computer Level 4 network attack corpse notes

Now I am bored and report to the computer's 4-level network attack dead. It was originally a hard-to-remember task, but now I have learned the knowledge in a down-to-earth manner. // I am too lazy. The concept details are directly linked.   Chapter 1 Basic Principles of network system structure and design   1.1 Basic KnowledgeLan man (man, Khan !) Wan wanieee American Institute of Electrical Engineering set up the 802 committee for the development of international LAN standards. In 1985, IEEE published five standard documents of the IEEE 802 standard, after becoming a u. S. Standard in the same year, ISO recommended that the 802 standard be set as Lan International Standard 1, LLC and macieee 802. The data link layer should be divided into two sub-layers: one is related to the physical media, media Access Control Layer Mac, the other is the unified logical control layer LLC // data link layer http://baike.baidu.com/view/239592.htm//MAC Ethernet // Ethernet http://baike.baidu.com/view/848.htm//wired 802.3 ingress etherhet V2 standard and 802.3 standard/Wireless 802.11 Gbit/s

Starting from 2004, IEEE formed a new unit to develop 802.11n. The speed of 540 Mb/s is fifty times that of 802.11b (11 Mb/s)

5 times of 802.11g (54 m/s)

// Connectionless protocol http://baike.baidu.com/view/732127.htm

 

1.2.5 practical training task

1. Structure of broadband MAN

// Man http://baike.baidu.com/view/61730.htm

 

// It seems that it is too troublesome to upload images. It is better to buy books because the pictures are too detailed, so they are deleted.

// It is good to collect the relevant materials for assisting reading. Today I read this book by introducing psychology, which is a good method.

 

Chapter 2 Overall Planning and Design of the Network System for Small and Medium-sized Enterprises

2.2.2 practical training task 2: Basic Network Design Methods // key *****

2. network topology structure http://baike.baidu.com/view/228909.htm