CCNA系列认证
多选题When you compare the differences between half-duplex and full-duplex Ethernet,which of the following characteristics are exclusive to half-duplex?（）AHalf-duplex Ethernet operates in a shared collision domain.BHalf-duplex Ethernet operates in an exclusi
题目
Half-duplex Ethernet operates in a shared collision domain.
Half-duplex Ethernet operates in an exclusive broadcast domain.
Half-duplex Ethernet has efficient throughput.
Half-duplex Ethernet has lower effective throughput.
Half-duplex Ethernet operates in an exclusive collision domain.
相似问题和答案
第1题：
A.how the activities fit the objectives
B.the differences between the what and the how of each activity
C.you can plan the activity with any different forms as you like
D.which activities demand oral or written work, which have visual, and which have tactile elements
第2题：
Again, differences between people and the opportunity for natural selection to take advantage of it have diminished.
68. 【译文】人与人之间的差异以及自然选择利用该差异的机会减少了。
【解析】注意 differences between people和 the opportunity for natural selection to take advantage of it是两个并列的主语，千万不要理解成 people与the opportunity 是between 的并列宾语。另外注意句中的 it 指代的是 differences between people。
重点词组：natural selection 自然选择；take advantage of 利用
第3题：
You want to upgrade the Ezonexam LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
A．Full-duplex Ethernet consists of a shared cable segment. Half-duplex provides a point-to-point link
B．Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive
C．Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
D．Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal
E．None of the above
第4题：
What are the differences between full-duplex Ethernet and half-duplex Ethernet?（）
- A、Half-duplex Ethernet operates in a shared collision domain.
- B、Full-duplex Ethernet has a lower effective throughput.
- C、Half-duplex Ethernet operates in a private collision domain.
- D、Full-duplex Ethernet allows two-way communication.
- E、Half-duplex Ethernet operates in a private broadcast domain.
正确答案:A,D
第5题：
The most recognizable differences between American English and British English are in（）and vocabulary.
Ausage
Bgrammar
Cpronunciation
Dstructure
C
略
第6题：
It is easy to detect the physical differences between originals and copies.()
第7题：
When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating ________．
A.Heave it home as fast as you can
B.Heave it home intermittently，between swells
C.Leave the anchor under foot，until the vessel may be brought before the sea
D.Wait for a calm spot between seas，then house it
第8题：
When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)
A．Half-duplex Ethernet operates in a shared collision domain.
B．Half-duplex Ethernet operates in an exclusive broadcast domain.
C．Half-duplex Ethernet has efficient throughput.
D．Half-duplex Ethernet has lower effective throughput.
E．Half-duplex Ethernet operates in an exclusive collision domain.
解析：Explanation:
A single device could not be sending a frame. and receiving a frame. at the same time because it would mean that a collision was occurring. So, devices simply chose not to send a frame. while receiving a frame. That logic is called half-duplex logic.
Ethernet switches allow multiple frames to be sent over different ports at the same time. Additionally, if only one device is connected to a switch port, there is never a possibility that a collision could occur. So, LAN switches with only one device cabled to each port of the switch allow the use of full-duplex operation. Full duplex means that an Ethernet card can send and receive concurrently.
Incorrect Answers:
B. Full duplex effectively doubles the throughput of half-duplex operation, because data can be both sent and received at the full 10/100 speed.
C, E. In half duplex operation, the network is shared between all devices in the collision domain.
第9题：
When should traffic shaping be implemented on Frame Relay PVCs？（）
- A、When you want to drop excess traffic above the CIR
- B、When there is a speed mismatch between the central site and the remote site
- C、When using Frame Relay SVCs
- D、When over-subscribing the central site link
- E、When LLQ is implemented on the Frame Relay PVC
- F、When Multilink PPP LFI is implemented on the Frame Relay PVC
正确答案:B,D
第10题：
When should you enable Network Address Translation Transparency (NAT-T) on the Teleworker?（）
- A、when a router between the Teleworker router and the head-end VPN router is doing NAT/pNAT and does not support IPSec pass-through
- B、when the Teleworker router itself is doing NAT/pNAT
- C、always
- D、never
正确答案:A