【名词&注释】
路由器(router)
[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)
A. A device waits for an electronic signal before transmitting.
B. A device listens and waits until the media is not busy before transmitting.
C. All devices on an Ethernet segment see data that passes on the network medium.
D. Only the sender and the receiver devices see data that passes on the network medium.
E. Ethernet networks allow you to configured devises with higher transmission priority.
查看答案&解析
举一反三：
[单选题]While troubleshooting a connectivity issue from a PC you obtain the following information:Local PC IP address: 190.0.3.35/24
A. Default Gateway: 190.0.3.1
B. Remote Server: 190.0.5.250/24
C. You then conduct the following tests from the local PC:
D. Ping 127.0.0.1 - Unsuccessful
E. Ping 190.0.3.35 - Successful
F. Ping 190.0.3.1 - Unsuccessful
G. Ping 190.0.5.250 – Unsuccessful
H. What is the underlying cause of this problem?
I. TCP/IP not correctly installed
J. Local physical layer problem
K. NIC not functioning
L. Remote physical layer problem
M. None of the above
[单选题]How many usable IP addresses can you get from a conventional Class C address?
A. 128
B. 192
C. 254
D. 256
E. 510
[单选题]配置路由器时，封装PPP协议的命令是：()
A. encap ppp
B. ppp
C. group ppp
D. int ppp
[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)
A. Create the VLAN.
B. Name the VLAN.
C. Configure an IP address for the VLAN.
D. Add the desired ports to the new VLAN.
E. Add the VLAN to the VTP domain.
[单选题]扩展IP访问权限表的表号范围是：()
A. 1—100
B. 1-99
C. 100-199
D. 800-899
[多选题]Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)
A. The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.
B. The DHCP Discover message uses UDP as the transport layer protocol.
C. The DHCP Discover message uses a special Layer 2 multicast address as the destination address.
D. The DHCP Discover message uses TCP as the transport layer protocol.
E. The DHCP Discover message does not use a Layer 2 destination address.
F. F. The DHCP Discover message does not require a transport layer protocol.
[多选题]As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)
A. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds
B. It encourages industry standardization by defining what functions occur at each layer of the model
C. It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting
D. It provides a means by which changes in functionality in one layer require changes in other layers
E. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers
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