[讨论]关于两套模拟题的几道题目,请大家指教一下

阿晨 · 发表于 2004-10-5 22:34:31

spoto的ftp服务器上的ccna的两套模拟题,我想很多人应该做了. 应该是老大20号考前辅导用的吧.偶太远,没去!(省钱阿....最近物价暴涨,温饱都成问题,更何况还要考ccna呢:() 有些问题不是很明白,贴出来大家来讨论谈论. 下面是问题,呵呵,一题一题来,不会算我恶意灌水吧[em2] 家如果还有什么没其他题目一起跟着贴吧 ［此帖子已被阿晨在 2004-10-6 13:06:42 编辑过］

阿晨 · 发表于 2004-10-5 22:39:55

Which three basic switch functions increase available bandwidth on the network? (Choose three) A. Loop avoidance. B. Address learning C. Hop count limiting D. Broadcast filtering E. Packet forward/filtering 答案选:ABE 不明白E,包的转发和筛选本来就是交换网络要实现的功能，与增加可用带宽有什么关系。当时我选的是ABC，我想对跳数的限制可以减少网络上的流量从而达到实现增加可用带宽的目的。

阿晨 · 发表于 2004-10-5 22:57:26

What are four function/characteristics of the network layer of the OSI model? (Choose four) A. It uses a two-part address. B. It maintains routing tables. C. It uses broadcast addresses. D. It establishes network addresses. E. It provides access to the LAN media. F. It provides media independence for upper layers. G. It provides path selection for internetwork communication. 答案选：ABCD 不明白选项:G 网络层用于路由选择，这个选项有错吗?当初选的是ABCG，网络层使用ip地址，建立ip地址感觉好像是老大一类人指定的^^~

阿晨 · 发表于 2004-10-5 23:07:31

With the hierarchical numbering of IP addresses what determines the portion of the address that will identify the network number? A. Subnet Mask B. Dots between octets C. Class of first octet D. Assignments of DHCP E. Address-resolution process 答案选：C 这好像是一个很简单的问题,我选A,我要是范了什么常识性错误不要B4我啊~!~~

阿晨 · 发表于 2004-10-6 13:02:20

昨天贴到熄灯.没贴完.....差点非法 继续.... Which three statements about common elements of the TCP/IP protocol stack are true? (Choose three) A. IP provides connection less service and routing capabilities. B. ARP enables devices to locate the IP address of local devices. C. UDP provides simple connection less service without windowing or acknowledgements. D. ICMP provides connection oriented management data to routers and layer three switches. E. TCP enables devices to send large quantities of data using switching in a connection-oriented manner. 答案选：ABC 不明白选项E,是不是不是用交换的方式发送大量数据,这里不是很清楚,有人点拨一下吗>?当初选ACE,arp不是把ip地址解析成MAC地址用的,locate mac address of local devices 似乎更正确一点.

阿晨 · 发表于 2004-10-6 13:04:38

Which of the following are not true of standard half-duplex Ethernet circuitry? A. It is alternate one-way communication. B. The receive (RX) is wired directly to the transmit (TX) of the remote station. C. The receive (TX) is wired directly to the receive (RX) of the remote station. D. Collisions are not possible. E. Both stations can transmit simultaneously. 答案选：D D肯定是要选的，有问题的时E，在半双工的以太网线路上可以同时发送数据吗？半双工传输不是可以在任意方向上传输，但不能在两个方向上同时传输吗？注意到题目的following后面跟的是are，估计答案不止一个，不知道对不^^.

丁丁 · 发表于 2004-10-7 13:20:33

第三题我也选A

chinamoon · 发表于 2004-10-12 11:31:09

C. Hop count limiting 这个是路由器的概念。

原文由 [B]阿晨[/B] 发表: Which three basic switch functions increase available bandwidth on the network? (Choose three) A. Loop avoidance. B. Address learning C. Hop count limiting D. Broadcast filtering E. Packet forward/filtering 答案选:ABE 不明白E,包的转发和筛选本来就是交换网络要实现的功能，与增加可用带宽有什么关系。当时我选的是ABC，我想对跳数的限制可以减少网络上的流量从而达到实现增加可用带宽的目的。

chinamoon · 发表于 2004-10-12 11:36:45

这题选ACE，以前更正过（详见旧帖）。 可能是给你的参考答案没有更正，特此说明。

原文由 [B]阿晨[/B] 发表: 昨天贴到熄灯.没贴完.....差点非法 继续.... Which three statements about common elements of the TCP/IP protocol stack are true? (Choose three) A. IP provides connection less service and routing capabilities. B. ARP enables devices to locate the IP address of local devices. C. UDP provides simple connection less service without windowing or acknowledgements. D. ICMP provides connection oriented management data to routers and layer three switches. E. TCP enables devices to send large quantities of data using switching in a connection-oriented manner. 答案选：ABC 不明白选项E,是不是不是用交换的方式发送大量数据,这里不是很清楚,有人点拨一下吗>?当初选ACE,arp不是把ip地址解析成MAC地址用的,locate mac address of local devices 似乎更正确一点.

Jeff0310 · 发表于 2004-10-12 13:26:24

最后一题：开始我也选E，后来想想是错的，因为就是可能会发生这种情况才定义了CSMA/CD，对吧！[em80]

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[讨论/求助] [讨论]关于两套模拟题的几道题目,请大家指教一下