毛泽东指出的中国反帝反封建的资产阶级民主革命的先行者是（）A．康有为B．孙中山C．严复D．章太炎

A. Integrated Services Routers

B. Firewall Appliances

C. Cisco Unified CallManager

D. Multilayer switch with enhanced image

E. Cisco Unity

F. VPN Concentrators

A. Cisco SMB Support Assistant

B. Cisco Advanced Services

C. Cisco Technical Support Services

D. Cisco SMARTnet

A. Cisco SMB Support Assistant

B. Cisco Technical Support Services

C. Cisco Advanced Services

D. Cisco SMARTnet

A. Cisco IOS upgrade, including the most recent patches and bug fixes

B. OnSite Support

C. Advanced Hardware Replacement

D. No Hardware Replacement

A. The best option is to download it from the Cisco TAC website

B. The best option is to download it from the Cisco.Com Software support site

C. The best option is to download it form the Cisco Advanced Services website

D. The best option is to download it from the TFTP site on Cisco.com

A. Integrated Hardware for offload of encryption services

B. Wireless LAN

C. SRST with centralized Cisco CallManager fro up to 120 IP Phones

D. Support For up to Eight NMEs

E. Cisco CallManager Express for up to 36 IP Phones support

F. High Performance Architecture optimized for concurrent service deployment

A. Cisco Unity

B. CiscoIntegrated Messaging

C. Cisco WebEx Connect

D. CiscoUnified Personal Communicator

A．用于小型企业的Cisco统一通信500系列设备

B．Cisco统一IP电话

C．Cisco 4402 WLAN控制器

D．Cisco 521无线Express AP

Cisco路由器查看路由表信息的命令是______。

A．show route

B．show router

C．show ip route

D．show ip router

先阅读如下说明，然后回答问题。

[说明]

IPSec(Internet协议安全)是一个工业标准网络安全协议，为IP网络通信提供透明的安全服务，保护TCP/IP通信免遭窃听和篡改，可以有效抵御网络攻击，同时保持易用性。IPSec有两个基本目标：保护 IP数据包安全；为抵御网络攻击提供防护措施。以下是IPSec部分配置清单。

Cisco 3640 (config) crygto isakmp policy 1 (1)

Cisco 3640 (config-isakmp) group 1 (2)

Cisco 3640 (config-isakmp) anthentication pre-share (3)

Cisco 3640 (config-isalmap) lifetime 3600

Cisco 3640 (config) crypto isakmp key noIP4u address202.10.36.1 (4)

Cisco 3640 (config) access-list 130 permit ip 192.168.1.0 0.0.0.255 172.19.20.0 0.0.0.255 (5)

Cisco 3640 (config) crypto ipsec transform-set vpn1 ah-md5-hmac esp-des esp-md5-hmac (6)

Cisco 3640 (config) crypto map shortsec 60 ipsec-isakmp

Cisco 3640 (config-crypto-map) set peer 202.10.36.1

Cisco 3640 (config-crypto-map) set ixansform-setvgnl (7)

Cisco 3640 (config-crypto-map) match address 130

Cisco 3640 (config) interface s0

Cisco 3640 (config-if) crypto real/shortsec (8)

......

请解释上述标有下画线语句的含义。