256.DHCP 客户端在租期到达哪个比例时第一次发送续租报文?( )【单选题】

A. 广播类型

B. 点到点类型

C. 点到多点

D. NBMA

A. NextHop 显示此路由条目对应的本地接口地址

B. Pre 显示此路由协议的优先级

C. Destination/Mask 显示目的网络/主机的地址和掩码长度

D. Proto 显示学习此路由的来源

A. LSACK

B. LSU

C. Hello

D. LSR

A. acl number 2000
rule 5 deny source 100.0. 12.0.0.0.0.255
rule 10 permit
#
interface GigabitEthernet0/0/3
traffic-filter outbound acl 2000
#

B. acl number 2000
rule 5 permit source 100.0.13.0.0.0.0.255
rule 10 deny source100.0.12.0.0.0.0.255
#
interface GigabitEthernet0/0/3
traffic-filter outbound acl 2000
#

C. acl number 2000
rule 5 permit source 100.0.13.0.0.0.0.255
rule 10 deny
#
interface GigabitEthernet0/0/3
traffic-filter outbound acl 2000
#

D. acl number 2000
rule 5 deny source 100.0.12.0.0.0.0.255
rule 10 permit source 100.0.13.0.0.0.0.255
#
interface GigabitEthernet0/0/3
traffic-filter outbound acl 2000
#

A. Radius 认证

B. MAC 地址认证

C. 802.1x 认证

D. portal 认证

A. 更高的消耗

B. 更高每 AP 接入终端数

C. 更低的传输时延

D. 更高的带宽

A. Point-to-Point

B. Non-Broadcast Multi-Access

C. Point-to-Multipoint

D. Broadcast