单选题221.17.101.223/28 is an example of which kind of notation？（）A ARPB CIDRC DNSD Port Number

题目

单选题

221.17.101.223/28 is an example of which kind of notation？（）

ARP

CIDR

DNS

Port Number

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相似问题和答案

第1题：

下面的( )协议提供了把域名地址转变为IP 地址。

A. ARP

B. TCP

C.DNS

D.UDP

参考答案：C

第2题：

如果想通过目标主机的IP地址得到其MAC地址,需要通过( )协议来完成。

A、ARP

B、RARP

C、DNS

D、DHCP

正确答案：A

第3题：

Internet上实现将域名转换为IP地址的协议为( )。

A.ARP

B.RARP

C.DNS

D.SNMP

正确答案:C

第4题：

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）

A、lowest port MAC address
B、port priority number and MAC address
C、VTP revision number
D、highest port priority number
E、path cost

正确答案:E

第5题：

The maximum number of routers per OSPF area typically depends on which three factors?()

A. the kind of OSPF areas being implemented

B. the number of external LSAs in the network

C. the number of DRs and BDRs in the areas

D. the number of virtual links in the areas

E. how well the areas can be summarized

F. the use of LSA filters

参考答案：A, B, E

第6题：

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?

A. path cost

B. lowest port MAC address

C. VTP revision number

D. highest port priority number

E. port priority number and MAC address

F. None of the above

正确答案：A
A 解析：Explanation:
At the conclusion of the root bridge election process, the switches move on to selecting Root Ports. The Root Port of a bridge is the port that is closest to the Root Bridge in terms of Path Cost.

Every non-Root Bridge must select one Root Port. Again, bridges use the concept of cost to measure closeness. As with some routing metrics, the measure of closeness using STP is not necessarily reflected by hop count. Specifically, bridges track what is referred to as Root Path Cost, which is the cumulative cost of all links to the Root Bridge.

第7题：

17.101.223／28isanexampleofwhichkindofnotation?()

A.ARP

B.CIDR

C.DNS

D.PortNumber

参考答案：B

第8题：

域名解析使用的应用层协议是

A．ARP

B．POP

C．DNS

D．RIP

正确答案：C
解析：DNS是域名系统(Domain Name System)的缩写，用于将域名解析为对应的IP地址，工作在应用层。

第9题：

（）协议负责解析IP地址到MAC地址的转换。

A、ARP
B、SNMP
C、DNS
D、ICMP

正确答案:A

第10题：

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-treetopology?（）

A、lowest port MAC address
B、port priority number and MAC address.
C、VTP revision number
D、highest port priority number.
E、pathcost

正确答案:E

单选题221.17.101.223/28 is an example of which kind of notation？（）A ARPB CIDRC DNSD Port Number

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