物质的折光率因温度或入射波长的不同而改变,透光物质的温度升高,折光率( )A.变...

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【单选题】

物质的折光率因温度或入射波长的不同而改变,透光物质的温度升高,折光率( )

变大

变小

不变

不一定

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【多选题】继电器连接模块(RIM)作用( )

本地机车联锁的空气制动系统的输入和输出

输入强迫制动和紧急制动指令

BC （制动缸）压力抑制、紧急制动撒沙

机车控制回路的输出

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【单选题】203关于交换机和路由表的说法错误的是

广域网中的交换机称为分组交换机或包交换机

每个交换机均有路由表,用于确定收到的数据包从哪一个端口转发出去

路由表中的路由数据是固定不变的

交换机的端口有两种,连接计算机的端口速度较低,连接其他交换机的端口速度较高

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【单选题】下列是一台第三层交换机的部分路由表信息,表中的路由信息完全正确的是

C 222.29.155 0/24 is directly connected Vlan455O E1 222.29.87.0/24 [l20/21]via 162.105. 254.24,2d16h,Vlan2202 38 97.0/30 is subnetted 1 subnetsC 202.38.97.196 is directly connected VIan902O 222.29.70.0/24 [120/2] via 162.105.254.5, 2d16h,Vlan2O 222.29.117.0/24 [120/2] via 162. 105.254.15, 2d16h Vlan2C 222.29.159.8129 is direcly connected Vlan909S 222.29.159.48/28 [1/0]via 222.29.159.10

C 222.29.155 0/24 is directly connected Vlan455O El 222.29.87.0/24 [110/21]via 162.105. 254.24, 2d16h,Vlan2202.38 97.0/30 is subnetted,1 subnets

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【单选题】下列Cisco第三层交换机的路由表信息中,路由表项全部正确的是

O 202.205.159.0/24 [110/20] via 202.112.62.242, 00:23:00, Vlan2C 202.112.7.0/24 is directly commected, Vlan157C 219.243.224.168 is directy connected VIan30O E2 202.205.233.0/24 [110/20] via 202.112.62 242, 00:23:00,Vlan253S 202.38.97.196 [1/0]via 202.112.41.226S* 0.0.0.0/0 [1/0]via 202.112.38.17

O 202.205.159.0/24[110/20] via 202. 112.62.242, 00:23:00 Vlan2

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【单选题】下列Cisco第三层交换机的路由表信息中，路由表项全部正确的是______。

O 202.205.159.0/24 [110/20] via 202.112.62.242,00:23:00,Vlan2C 202.112.7.0/24 is directly connected,FastEthernet2/2C 219.243.224.168 is directly connected,GigabitEthernet8/0O E2 202.205.233.0/24 [110/20] via 202.112.62.242,00:23:00,Vlan253S 202.38.97.196 [1/0] via 202.112.41.226S * 0.0.0.0/0 [1/0] via 202.112.38.17

O 202.205.159.0/24 [110/20] via 202.112.62.242,00:23L00,Vlan2C 202.112.7.0/24 is directly connected,Vlan157C 219.243.224.168 is directly connected,Vlan30O E2 202.205.233.0/24 [110/20] via 202.112.62.242,00:23:00,Vlan253S 202.38.97.196 [0/0] via 202.112.41.226S * 0.0.0.0/32 [0/0] via 202.112.38.17

O 202.205.159.0/24 [110/20] via 202.112.62.242,00:23:00,Vlan2C 202.112.7.0/24 is directly connected,Vlanl57C 219.243.224.168 is directly connected,Vlan30O E2 202.205.233.0/24 [110/20] via 202.112.62.242,00:23:00,Vlan253S 202.38.97.196 [1/0] via 202.112.41.226S * 0.0.0.0/0 [1/0] via 202.112.38.17

O 202.205.159.0/24 [115/20] via 202.112.62.242,00:23:00,Vlan2C 202.112.7.0/24 is directly connected,Vlanl57C 219.243.224.168 is directly connected,Vlan30O E2 202.205.233.0/24 [115/20] via 202.112.62.242,00:23:00,Vlan253S 202.38.97.196 [1/0] via 202.112.41.226S * 0.0.0.0/0 [1/0] via 202.112.38.17

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【单选题】下列是一台第三层交换机的路由表信息,表中的管理距离值为缺省值,其中路由表项全部正确的是

O 162.105.152.0/24 [110/2]via 162.105.254.8, 00:23:00 Vlan2 O 162.105.152.0/24 [110/2]via 162.105.254.14, 00:23:00 Vlan2 C 162.105.157.0/24 is directly connected Vian157 C 162.105.156.0/24 is directy connected Vlan30 O E1 162.105.144.0/25 [110/30] via 162. 105.253.249,00:23:00,Vlan253 O 162.105.151.0/24 [110/2] via 162.105. 254.14,00:23:00 Vlan2 S 162.105.239.0/25 [1/0] via Vlan252 S 162.105.125.128/26 [1/0]via Vlan3

O 162.105.153 0/24 [110/2]via 162. 105.254.8, 00:23:00 Vlan2 O 162.105.152.0/24 [110/2] via 162.105.254.14, 00:23:00, Vlan2 C 162.105. 157.0/24 is directly connected, 00:23:00 POS3/0 C 162.105.156.0/24 is directly conncted, 00:23:00, FastEthernet2/5 O E1 162.105.144.0/25 [110/30] via 162.105.253.249,00:23:00Vlan253 O 162.105.151.0/24 [110/2]via 162. 105.254.14.00:23:00. Vlan2 S 162.105.239.0/25 [1/0]via 202.112.41.6 S 162.105.125.128/26 [1/0] via 202.112.7.1

O 162.105.153.0/24 [110/2] via 162. 105.254.8,00:23:00 Vlan2 O 162.105.152.0/24 [110/2] via 162.105.254.14 00:23:00 Vlan2 C 162.105.157.0/24 is directly connected Vian157 C 162.105.156.0/24 is directy connected Vlan30 O E1 162.105.144.0/25 [110/30] via 162. 105.253.249, 00:23:00,Vlan253 O 162.105.151.0/24[110/2] via 162.105. 254.14,00:23:00 Vlan2 S 162.105.239.0/25 [10]via 202112.41.6 S 162.105.125.128/26 [1/0] via 202.112.7.1

O 162.105.153.0/24 [170/2] via 162. 105.254.8,00:23:00 Vlan2 O 162.105.152.0/24 [170/2] via 162.105.254.14 00:23:00 Vlan2 C 162.105.157.0/24 is directly connected Vian157 C 162.105.156.0/24 is directy connected Vlan30 O E1 162.105.144.0/25 [170/30] via 162. 105.253.249, 00:23:00,Vlan253 O 162.105.151.0/24[170/2] via 162.105. 254.14,00:23:00 Vlan2 S 162.105.239.0/25 [1/0]via 202112.41.6 S 162.105.125.128/26 [1/0] via 202.112.7.1

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【单选题】下列是台第三层交换机的部分路由表, 其中管理距离为缺省值,正确的路由信息是

O 162.105.153.0/24 [110/2] via 162 105 254.8, 0023:00, Vlan2 O E1162.105.144.0/25 [110/30] via 162.105.253.249, 00:23:00,Vlan253 C 162.105.157.0/24 is directly connected, Vlan157 C 162.105.156.0/24 is directly comected, Vlan30 S 162.105.239.0/25 [1/0] via 202 112.41.6 S 162.105.125.128/26 [1/0] via 202. 112.7.0

O 162.105.1530/24 [120/2] via 162.105.254.8, 00:23:00, Vlan2 O E1 162105144.0/25 [12030] via 162.105 253249, 00:23:00,VIan253 C 162.105.157.0/24 is directly connected, VIan157 C 162.105.156.0/24 is drectly conected, Vlan30 S 162.105.239.0/25 [1/0]via 202.112.41.6 S 162.105.125.128.26[1/0]via 202.112.7.1

O 162.105.1530/24 [110/2] via 162.105.254.8, 00:23:00, Vlan2 O E1 162.105.144.0/25 [110/30]via 162.105.253.249,00:23:00,Vlan253 C 162.105.157.0/24 is directly connected, Vlan157 C 162.105.156.0/24 is directly connected, Vlan30 S 162.105.239.0/25 [1/0] via 202.112.41.6 S 162.105.125.128/26 [1/0]via 202.112.7.1

O 162.105.153.0/24 [110/2]via 162. 105.254.8, 00:23:00, Vlan2 O E1 162.105.144.0/25 [110/30] via 162.105.253.249, 00:23:00,Vlan253 C 162.105.157.0/24 is directly connected, via 162.105.157.1 C 162.105.156.0/24 is directly connected, via 162.105.156.1 S 162.105.239.025 [1/0]via202.112.41.6 S 162.105.125.128/26 [1/0]via 202.112.71

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【单选题】关于交换机和路由表的说法错误的是________。

广域网中的交换机称为分组交换机或包交换机

每个交换机有一张路由表

路由表中的路由数据是固定不变的

交换机的端口有两种,连接计算机的端口速度较低,连接其它交换机的端口速度较高

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【单选题】下列是一台第三层交换机的部分路由表，其中管理距离为缺省值，正确的路由信息是______。

O 162.105.153.0/24[110/2]via 162.105.254.8，00:23:00，Vlan2 O \r\nE1162.105.144.0/25[110/30]via 162.105.253.249，00:23:00，Vlan253 \r\nC162.105.157.0/24 is directly connected.via 162.105.157.1 \r\nC162.105.156.0/24 is directly connected，via 162.105.156.1 \r\nS162.105.239.0/25[1/0]via 202.112.41.6 S162.105.125.128/26[1/0]via \r\n202.112.7.1

O 162.105.153.0/24[120/2]via 162.105.254.8，00:23:00，Vlan2 O \r\nE1162.105.144.0/25[120/30]via 162.105.253.249，00:23:00，Vlan253 \r\nC162.105.157.0/24 is directly connected，Vlanl57 C162.105.156.0/24 \r\nis directly connected，Vlan30 S162.105.239.0/25[1/0] via \r\n202.112.41.6 S162.105.125.128/26[1/0] via 202.112.7.1

162.105.153.0/24[110/2]via 162.105.254.8，00:23:00，Vlan2 O E1 \r\n162.105.144.0/25[110/30]via 162.105.253.249，00:23:00，Vlan253 \r\nC162.105.157.0/24 is directly connected，Vlan157 C162.105.156.0/24 \r\nis directly connected，Vlan30 S162.105.239.0/25[1/0]via \r\n202.112.41.6 S 162.105.125.128/26[1/0]via 202.112.7.0

O 162.105.153.0/24[110/2]via 162.105.254.8，00:23:00，Vlan2 O \r\nE1162.105.144.0/25[110/30]via 162.105.253.249，00:23:00，Vlan253 \r\nC162.105.157.0/24 is directly connected，Vlanl57 C162.105.156.0/24 \r\nis directly connected，Vlan30 S162.105.2390/25[1/0]via \r\n202.112.41.6 S 162.105.125.128/26[1/0]via 202.112.7.1

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【简答题】在电气系统中,元器件的驱动部分和被驱动部分表示方法有 3 种 : ( )、( )和( )。

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【多选题】继电器连接模块(RIM)作用( )

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【单选题】203关于交换机和路由表的说法错误的是

广域网中的交换机称为分组交换机或包交换机