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SNMPv2增加了一个非原子的Get命令,可以做到 (1) ,SNMPv2增加的 Inform命令使得网络管理的结构可以是 (2) 。SNMPv1的报文中除版本号和SNMP PDU外,还包括 (3) ,在SNMPv2中在原PDU的基础上增加了 (4) 信息。 RMON2监视 (5) 层的通信。 3()

A. 数据
B. 用户
C. 口令
D. 团体

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沙发的坐面高度尺寸一般选择356~432mm。( )

A. 对
B. 错

若采用策略路由将来自192.168.4.0/24网络去往Internet的数据流转发到ISP1,将来自192.168.1.0/24网络去往Internet的数据流转发到ISP2,请将以下(7)~(12)空缺处的内容填写完整。 R1 (config)#access-list 1 permit 192.168.1.0 0.0.0.255 R1 (config)#access-list 2 permit 192.168.4.0 0.0.0.255 R1 (config)# roune-map ISP1 permit 10 R1 (config-route-map)# match ip address (7) R1 (config-route-map)# set interface (8) R1 (config-route-map# exit R1 (config)# route-map ISP2 permit 20 R1 (config-route-map)# match iP address (9) R1 (config-route-map)# set interface (10) R1 (config-toure-map)# exit R1 (config)# interface f0/1 R1 (config-if)#ip policy route-map ISP2 R1 (config-if)# interface f0/2 R1 (config-if)#ip policy route-map (11) R1 (config-if)# interface (12) R1 (config-if)#ip policy route-map ISP1 R1 (config-if)#

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) , it must describe the traffic to be offered and the service expected. 4()

A. flow
B. admission
C. traffic
D. time

RS-232标准在初期可以满足人们的要求,但当人们要求以更高的速率传送到更远的距离时,需要有新的标准,RS-449就可以实现这个目的。它的标准规格中,RS-422标准是平衡式的,传输一个信号用两条线,逻辑信号的表示用 (1) ,双线传输的好处是 (2) 。 X.21的接口是 (3) 之间的接口,为兼容RS-232设备,制定了 (4) 。X.21接口每根线上可以 (5) 。 1()

A. 正负5V以上
B. 正负3V以上
C. 两条线的电平差
D. 两条线的电子

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