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Linux系统中,默认安装DHCP服务的配置文件为 ( ) 。
A、/etc/dhcpd.conf
B、/etc/dhcp.conf
C、/etc/dhcpd.config
D、/etc/dhcp.config
IEEE 802.11i标准增强了WLAN的安全性,下面关于802.11i的描述中,错误的是 ( ) 。
A、加密算法采用高级数据加密标准AES
B、加密算法采用对等保密协议WEP
C、用802.1x实现了访问控制
D、使用TKIP协议实现了动态的加密过程
在SNMPv2中,一个实体接收到一个报文,一般经过四个步骤:
A、(1)(3)(2)(4)
B、(3)(2)(1)(4)
C、(4)(1)(3)(2)
D、(2)(1)(3)(4)
下面是显示交换机端口状态的例子:
2950# show interface fastEthernet0/1 switchport
Name: fa0/1
Switchport: Enabled
Administrative mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1, 2
Pruning VLANs Enabled: 2-1001
第42题:以下关于HTTPS的描述中,正确的是( )。
A.HTTPS和SHTTP是同一个协议的不同简称
B.HTTPS服务器端使用的缺省TCP端口是110
C.HTTPS是传输层协议
D.HTTPS是HTTP和SSL/TLS的组合
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