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1.Which is local network range?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2020/08/10 10:33:22
1.Which is local network range?
2km
10km
10km~
no limitation
2.Customer want to collect a serial signal from far 2km distance which can be a suggestion?
RS-485
Zigbee
Ethernet
Fiber
3.How many wires does RJ-45 connector have?
8
4
2
16
4.Which of the following connection mode does NOT require an AP?
Peer-To-Peer mode
Infrastructure mode
Ad-Hoc mode
None of above
5.If csutomer need cross region data transmit,which can be suggestion?
RS-232
RS-485
Ethernet
USB
6.Which of the following is supported operation mode of MODBUS gatway?
Virtual COM
MODBUS Master
Infrastructure Mode need AP to connect
Ad-Hoc Mode can work without AP
7.Following description about Anti-interference ability is right?
RS232>RS485
RS-232>RS422
Fiber>RS485
Wireless>RS-422
8.Which distance is less than the others?
LAN
MAN
WAN
All the same
9.For Peer to Peer aplication which function can reach this requirement?
Virtual COM
USDG
Double LAN
Double power input
10.What's the most commonly used cable type for fast Ethernet Network?
Cat5
Cat6
Cat5e
Cat4
1.A
2.D
3.A
4.B
5.C
6.A
7.A
8.A
9.
10.B
再问: 好像没全对啊哥们
再答: 第9题不会,其它的应该都差不多,你感觉哪道题不对,还可以讨论一下。
再问: 其实我也不确定,但是至少第4题你是错的。正确应该是A
再答: 看错题干了,我看成需要用AP了。不好意思。
再问: 别不好意思啊,帮忙确定下正确答案啊亲。急死我了。
再答: 其他的都对
再问: 我要吐血了,对了六道。哪四道错了啊亲,求帮忙问下确定下正确答案啊
再答: 估计应该是RS232那类的有问题。其它的应该都对。