1. 1 computer network overview
1. 1. 1 Basic concepts of computer networks
1. 1.2 Functions of computer network
1. 1.3 development and present situation of computer network
1. 1.4 computer network standardization and related organizations
1. 1.5 Composition of computer network
1.2 classification of computer networks
1.2. 1 Classify according to the coverage of the network.
1.2.2 by transmission medium
1.2.3 Classification by scope of use
1.2.4 classified by topological structure
1.2.5 Classification according to the communication mode of the network.
1.3 computer network architecture
The basic concept of 1.3. 1
1.3.2 ISO/OSI reference model
1.3.3 OSI communication principle
Disadvantages of 1.3.4 OSI/RM
1.3.5 TCP/IP architecture
Comparison of 1.3.6 OSI and TCP/IP reference models
1.3.7 architecture of five-layer protocol
summary
utilize
Chapter 2 Data Communication and Physical Layer
2. 1 Basic concepts of data communication
2. 1. 1 Basic model of data communication system
2. 1.2 information, data and signals
2. 1.3 analog and digital
2. 1.4 DTE and DCE
2.2 Performance indicators of data communication system
2.2. 1 data transmission rate
bandwidth
Baud rate
time lag
2.2.5 delay bandwidth product
2.2.6 Utilization ratio
error rate
2.3 Channel capacity
2.3. 1 Nyquist criterion
2.3.2 Shannon theory
2.4 data transmission mode
2.4. 1 simplex mode, half-duplex mode and full-duplex mode
2.4.2 Parallel transmission and serial transmission
2.4.3 Synchronous transmission and asynchronous transmission
2.4.4 baseband transmission and frequency band transmission
2.5 data coding and data modulation
2.5. 1 Digital signal coding of digital data
2.5.2 Digital data analog signal coding
2.5.3 Digital signal coding of analog data
2.6 channel multiplexing technology
2.6. 1 frequency division multiplexing
time-division multiplexing
wavelength division multiplex
code division multiplexing
2.7 Digital transmission system
2.7. 1 quasi-synchronous digital hierarchy
2.7.2 synchronous optical network and synchronous digital series
2.8 Physical layer transmission medium
2.8. 1 guided transmission medium
2.8.2 unguided transmission medium
2.9 Functions, models and characteristics of the physical layer
2.9. 1 physical layer function
2.9.2 Physical layer characteristics
Example of physical layer interface standard
RS-232 serial interface standard
summary
utilize
Chapter 3 Data Link Layer
3. 1 Overview of Data Link Layer
3. 1. 1 Basic functions of data link layer
3. 1.2 data link layer service
3.2 Frame synchronization function
3.2. 1 character counting method
3.2.2 Ending and Ending Delimiter Methods for Character Filling
3.2.3 Headend Delimiter Method for Bit Filling
3.3 Flow Control Function
Stop and wait protocol
3.3.2 Post-N-Frame ARQ Protocol
3.3.3 selective retransmission ARQ protocol
sliding window protocol
3.4 Error control function
3.4. 1 error characteristics
3.4.2 Principles of Error Detection and Correction
Error detection code
Error correction code
3.5 Data Link Layer Protocol
High-level data link control program
3.5.2 Internet data link control protocol PPP
summary
utilize
Chapter 4 LAN technology
4. Overview of1LAN
4.2 LAN architecture
4.2. 1 IEEE 802 LAN reference model
4.2.2 Media access control sublayer
4.2.3 logical link control sublayer
4.3 Ethernet Media Access Control Technology
4.3. 1 aloha
4.3.2 CSMA
CSMA/ CD
4.4 Ethernet frame format and data encapsulation
4.4. 1 Ethernet frame format
4.4.2 Ethernet data encapsulation
Addresses in Ethernet
4.5 Ordinary Ethernet
4.5. 1 Traditional Ethernet
4. 5. 2 100 Mbps Ethernet
4.5.3 Gigabit Ethernet
4.5.4 10 Gigabit Ethernet
4.6 Switched Ethernet
4.6. 1 switch
4.6.2 Switched Ethernet and its characteristics
4.7 Virtual LAN
4.7. 1 Virtual LAN concept
4.7.2 Advantages of VLAN over traditional LAN
Types of virtual LAN
4.7.4 Virtual local area network protocol standard
4.7.5 Link type of virtual local area network
4.8 Other LANs
4.8. 1 Token Ring
token bus
4.8.3 FDDI network
4.9 Wireless LAN
4.9. 1 Concept and characteristics of wireless local area network
4.9.2 Major WLAN standards
Architecture of wireless LAN
4.9.4 Media Access Control Mode of WLAN
4.9.5 Establishment of wireless local area network
Security of WLAN
summary
utilize
Chapter V Wan
5. Overview of1WAN
5.2 Data exchange technology of computer network
5.2. 1 circuit switching
Store and forward switching
5.3 WAN access technology
5.3. 1 DSL access technology
Frame relay network
5.3.3 ATM network
summary
utilize
Chapter 6 Network layer
6. 1 network layer overview
6. 1. 1 Functions of the network layer
6. 1.2 Services provided by the network layer
6.2 IPv4 protocol
6.2. Introduction to1IPv4 Protocol
6.2.2 IPv4 address and subnet division
IP datagram format
6.2.4 IP datagram segmentation and reassembly
IP datagram forwarding
6.2.6 Classless Inter-domain Routing
Network address translation
6.3 Network layer protocol
6.3. 1 ARP and RARP
ICMP
6.4 Routing Algorithm and Routing Protocol
6.4. 1 Routing Protocol Classification
6.4.2 Routing Information Protocol
6.4.3 Shortest Path First Routing Algorithm (SPF)
6.4.5 Open Shortest Path First Algorithm (OSPF)
bgp
6.5 Network layer equipment
6.5. 1 Composition and function of router
6.5.2 Routing table
Routing and forwarding
6.6 IPv6 protocol
6.6. Design Defects of1IPv4 Protocol
IPv6 datagram format
6.6.3 IPv6 address structure
6.6.4 Transition technology from IPv4 to IPv6
summary
utilize
Chapter 7 Transport layer
7. 1 overview
7. 1. 1 transport layer function
7. 1.2 transport layer service
7.2 Elements of Transmission Protocol
7.2. 1 transport layer addressing
7.2.2 Establish transmission connection
Release transport connection
7.2.4 Flow Control and Cache
7.3 TCP/IP transport layer
7.3. 1 User Datagram Protocol
User datagram format
7.4 transmission control protocol TCP
7.4. Overview of1TCP
7.4.2 header of TCP segment
7.4.3 TCP data numbering and confirmation
TCP reliability guarantee
TCP flow control
TCP congestion control
7.4.7 TCP transmission connection management
summary
utilize
Chapter 8 Application layer
8. 1 Basic concepts of application layer
8. 1. 1 Main application layer protocols
8. 1.2 network application mode
8.2 Domain Name System
8.2. 1 Internet Domain Name Structure
8.2.2 Domain Name Server
8.2.3 Domain Name Resolution Process
8.2.4 message format of DNS
8.3 file transfer protocol
8.3. Working principle of1FTP
8.3.2 FTP data format
FTP commands and responses
8.3.4 Simple File Transfer Protocol
8.4 Remote Login Protocol
8.4. Working principle of1telnet
8.4.2 Telnet Syntax and Remote Login Implementation
8.5 e-mail
8.5. 1 composition of e-mail system
8.5.2 E-mail format and MIME
SMTP and POP3
8.6 World Wide Web
8.6. 1 Working principle of World Wide Web
8.6.2 Uniform Resource Locator
Hypertext transfer protocol
8.7 Dynamic Host Configuration Protocol
8.7. Common terms of1DHCP
The working process of DHCP
8.8 Simple Network Management Protocol
8.8. 1 SNMP network management system
SNMP
Management information structure
8.8.4 Management information base
summary
utilize
Chapter IX Network Security
9. 1 Network Security Overview
9. 1. 1 Common network attack methods
9. 1.2 network security service
9. 1.3 network security mechanism
9.2 Data encryption technology
9.2. 1 symmetric key cryptosystem and DES algorithm
9.2.2 Public key cryptosystem and RSA algorithm
9.3 Digital Signature and Message Digest
9.3. 1 digital signature
Message summary
9.4 Computer virus
9.4. 1 The concept of computer virus
9.4.2 Characteristics of Computer Virus
9.4.3 Computer Virus Classification
9.4.4 Prevention and Control of Computer Virus
9.5 firewall technology
9.5. 1 Basic concept of firewall
Firewall architecture
Limitation of firewall
summary
utilize
refer to