')
　　 verify Verify a file
　　 where List active connections
　　 write Write running configuration to memory, network, or terminal
　　 x28 Become an X.28 PAD
　　 x3 Set X.3 parameters on PAD
　　
　　 Router#disable (退出特权执行模式，进入用户执行模式)
　　 Router>? (查看用户执行模式下的所有命令)
　　 Exec commands:
　　 access-enable Create a temporary Access-List entry
　　 access-profile Apply user-profile to interface
　　 ... (此处省略)
　　 udptn Open an udptn connection
　　 where List active connections
　　 x28 Become an X.28 PAD
　　 x3 Set X.3 parameters on PAD
　　 Router>show version (查看路由器的版本信息和组件信息)
　　 Cisco Internetwork Operating System Software
　　 IOS(tm)2500 Software(C2500-D-L),Version 12.1(8a),RELEASE SOFTWARE(fc1) IOS版本信息
　　 Copyright (c) 1986-2001 by cisco Systems, Inc.
　　 Compiled Wed 23-May-01 01:20 by yiyan
　　 Image text-base: 0x0000144C, data-base: 0x00843EA8
　　 ROM:System Bootstrap. Version 5.2(8a), RELEASE SOFTWARE ( ROM 版本信息)
　　 BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fcl)
　　
　　 Router uptime is 56 minutes (本路由器的开机时间)
　　 System returned to ROM by power-on
　　 System image file is "flash:c2500-d4.121-8a.mz" ( Flash中的IOS映像文件名)
　　 cisco 2500 (68030) processor (revision L) with 14336K/2048K bytes of memory. (处理器信息)
　　 Processor board ID 03215594, with hardware revision 00000000
　　 Bridging software.
　　 X.25 software, Version 3.0.0.
　　 2Ethernet/IEEE 802.3 mterface(s) (路由器物理接口)
　　 2Serial network interface(s) (路由器物理接口)
　　 32K bytes of non-volatile configuration memory. ( NVRAM, 大小为32K )
　　 8192K byte