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Cisco IOS software is the embedded software architecture in all Cisco IOS devices and is also the operating system of Catalyst switches. Its functions include carrying the chosen network protocols, connectivity, security, scalability, and reliability. A switch or IOS device can be configured from a local terminal connected to the console port or from a remote terminal connected via a modem connection to the auxiliary port. The CLI is used by network administrators to monitor and configure various Cisco IOS devices. CLI also offers a help facility to aid network administrators with the verification and configuration commands.

From the privileged EXEC mode, you can enter the global configuration mode, providing access to other configuration modes such as the interface configuration mode or line configuration mode. The main function of a router is to relay packets from one network device to another. To do this, the characteristics of the interfaces through which the packets are received and sent must be defined. Interface characteristics, such as the IP address and bandwidth, are configured using the interface configuration mode.

With 802.1X, the access point, acting as the authenticator at the enterprise edge, allows the client to associate using open authentication

网络安全关于理解交换机安全 Hardware threats Environmental threats Electrical threats Maintenance threats

Cisco路由器安全配置简易方案

各监控系统的应用监控,包括网络设备，数据库，操作系统等