网络中经常使用DDN服务，请选出DDN的优点（）

【名词&注释】

路由器(router)、优先级(priority)、物理层(physical layer)、专用线路(dedicated line)、数据链路层(data link layer)

[多选题]网络中经常使用DDN服务，请选出DDN的优点（）

A. 传输质量高
B. 接入方式灵活
C. 偷占带宽
D. 使用虚电路
E. 专用线路

查看答案&解析查看所有试题

学习资料：

[单选题]当拓扑信息完成交换，相邻路由器具有相同的LSDB时，下列哪项OSPF邻居状态是希望得到的()

A. 2-WAY
B. FULL
C. Exchange
D. Loading

[单选题]关于OSPF中DR的说法不正确的是（）

A. 通过hello报文选举DR
B. 如果某路由器优先级比DR优先级高，但启动晚，它会抢占原来的DR自己成为DR
C. 一个广播类型网络中只能有一个DR
D. 一旦DR失效，BDR接替DR的工作，并重新选举一个BDR

[单选题]在启用IGRP协议时，所需要的参数是：()

A. 网络掩码
B. 子网号
C. 自治系统号
D. 跳数

[单选题]OSI七层模型中，“包”是哪一层数据封装的名称（）

A. 物理层
B. 数据链路层^{(data link layer)}
C. 网络层
D. 传输层

[单选题]RIP路由协议认为“网络不可到达”的跳数是：()

A. 8
B. 16
C. 24
D. 100

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

A. The cable is attached properly.
B. CDP has discovered the connected device.
C. Keepalives are being received on the interface.
D. A carrier detect signal has been received from the connected device.
E. IP is correctly configured on the interface.

[单选题]Assuming you build networks to exact specifications, what is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?

A. 100 meters
B. 100 feet
C. 100 yards
D. 200 meters
E. None of the above

[单选题]From where does a small network typically get its IP network addresses or IP block?

A. From the Internet Domain Name Registry (IDNR)
B. From the Internet Assigned Numbers Authority (IANA．
C. From the Internet Service Provider (ISP)
D. From the Internet Architecture Board (IAB．
E. None of the above

[单选题]Study the Exhibit below carefully:London#show vtp

A. VTP Version: 2
B. Configuration Revision: 0
C. Maximum VLANs supported locally: 64
D. Number of existing VLANs: 5
E. VTP Operating Mode: Client
F. VTP Domain Name: London
G. VTP Pruning Mode: Disabled
H. VTP V2 Mode: Disabled
I. VTP Traps Generation: Disabled
J. Based on the information given above, what is the VTP function of this particular switch?
K. Learn and save VTP configuration in the running configuration.
L. Create and change VLANs.
M. Forwards information about VTP configuration.
N. VTP is disabled on this device.
O. VTP is not saved to NVRAM.

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