1. Describe the working principle of the network.

◆ Understand the purpose and function of main network equipment.

◆ Components can be selected according to network specifications.

◆ Explain how data is transmitted in the network with OSI and TCP/IP models and related protocols.

Describe common network applications, including web applications.

◆ Describe the purpose and basic operation of protocols under OSI and TCP models.

◆ Describe the effect of network-based applications (IP audio and IP video).

◆ Explain the network topology diagram.

◆ Determine the network path between two hosts in the network.

◆ Describe the structure of network and interconnection communication.

◆ Identify and correct common network faults at 1, 2, 3 and 7 layers by using hierarchical model.

◆ Distinguish the functions and characteristics of WAN and LAN.

2. Configure, check and repair VLAN and switches in the exchange communication environment.

Select appropriate media, cables, ports and connectors to connect the switch with the host or other network devices.

◆ Explain Ethernet technology and media access control methods.

◆ Explain the concepts of network segmentation and basic traffic management.

◆ Explain the concept of basic switching and the role of Cisco switches.

◆ Complete and verify the initial switching configuration tasks, including remote access control.

◆ Use basic programs (including ping, traceroute and telnet). SSH, arp, ipconfig) and show &；; The DEBUG command verifies the working status of the network and switches.

◆ Identify, specify and solve common switching network media problems, configuration problems, automatic negotiation and switching hardware failures.

◆ Describe advanced switching technologies (including VTP, RSTP, VLAN, PVSTP, 802. 1q).

◆ Describe how VLANs create logically isolated networks and the necessity of routing between them.

◆ Configure, check and repair VLANs.

◆ Configure, check and repair the trunking of Cisco switches.

◆ Configure, check and repair inter-VLAN routing.

◆ Configure, check and maintain VTP.

◆ Configure, check and repair the RSTP function.

◆ By explaining the output of SHOW and DEBUG commands in various situations, judge the working state of Cisco switching network.

◆ Implement basic switch security policies (including port security, aggregate access, VLAN management except VLAN 1, etc.). ).

3. Implement IP address planning and IP services to meet the network needs of branch networks of medium-sized companies.

◆ Describe the functions and benefits of using private IP and public IP.

◆ Explain the functions and advantages of DHCP and DNS.

◆ Configure, verify and debug DHCP and DNS operations (including command line mode and SDM mode) on the router.

◆ Realize the static and dynamic IP address service of the host under the LAN environment.

◆ Calculate and apply IP address planning in the network supporting VLSM (Variable Length Subnet Mask).

◆ Use VLSM and address summarization to determine the appropriate classless address planning to meet the address planning requirements of different LANs/WANs.

◆ Describe the technical requirements (including protocol release, dual-stack mode and tunnel mode) for realizing IPv6 under the storage condition of IPv4 network.

◆ Describe the IPv6 address.

◆ Identify and correct common IP address and host configuration problems.

4. Basic router operation and configuration, inspection and debugging of Cisco equipment routing.

Describe the basic concepts of routing (including IP packet forwarding and routing query)

◆ Describe the operation process of Cisco router (including the initial startup process, self-test and physical composition of the router).

Select the appropriate media, cables, ports and connectors to connect the router to other network devices and hosts.

Configuration, inspection and debugging of ripv2.

◆ Access the router and configure basic parameters (including command line mode and SDM mode).

◆ Connect, configure and check the working state of the equipment interface.

◆ Check the configuration of the equipment, and use commands such as ping, traceroute, telnet and SSH to check the network connectivity.

◆ Implement and verify the configuration of static route and default route under the given routing requirements.

◆ Manage IOS configuration files (including saving, modifying, updating and restoring).

◆ Manage Cisco IOS

◆ Compare different routing implementation methods and routing protocols.

◆ OSPF configuration, inspection and debugging

◆ EIGRP configuration, inspection and debugging

◆ Check the network connection (including using ping, traceroute, telnet, SSH and other commands).

◆ Routing fault debugging

◆ Use show and debug commands to check the running status of router hardware and software.

◆ Realize static router security.

5. Explain and select the appropriate manageable WLAN task.

◆ Describe wireless related standards (including IEEE, WIFI Alliance, ITU/FCC).

◆ Identify and describe the purpose of small wireless network structure (including SSID, BSS, ess).

◆ Determine the basic configuration of wireless network equipment and ensure that it is connected to the correct intervention point.

◆ Compare the characteristics and performance of different wireless security protocols (including: open, WPA, WEP- 1/2).

◆ Understand the common problems in WLAN implementation (including interface and configuration errors).

6. Identify network security threats and describe general methods to mitigate these threats.

Describe the current network security threats and explain the necessity of implementing comprehensive security strategies to reduce security threats.

◆ Explain the general methods to reduce the security threats to network devices, hosts and applications.

◆ Describe the functions of safety equipment and application software.

◆ Describe suggestions for safe operation procedures (including initial safety configuration of network equipment).

7. Implement, check and repair NAT and ACL in the branch network of small and medium-sized enterprises.

◆ Describe the functions and types of ACL.

◆ Configure and apply ALCs according to network filtering requirements (including command line mode and SDM mode).

◆ Configure and apply ALCs to restrict telnet and SSH access to the router (including command line mode and SDM mode).

◆ Check and monitor the ACL in the network environment.

◆ ACL debugging

◆ Describe the basic working principle of NAT.

◆ Configure NAT according to the given network requirements (including command line mode and SDM mode).

◆ NAT debugging

8. Implement and verify WAN connectivity

◆ Describe different ways to connect to the WAN.

◆ Configure and check the basic WAN serial link.

◆ Configure and check Frame Relay on Cisco router.

◆ Troubleshooting for WAN implementation

◆ Describe VPN (Virtual Private Network) technology (including its importance, advantages, influence and composition).

◆ Configure and check the PPP link between Cisco routers.

Or through 640-822 ICND 1 (CCENT new course) and 640-8 16 ICND2.