（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.A.The MAC address B.The IP address C.The subnet address D.The virtual address

题目

（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

A.The MAC address
B.The IP address
C.The subnet address
D.The virtual address

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相似问题和答案

第1题：

How is network layer addressing accomplished in the OSI protocol suite?()

A. Internet Protocol address

B. Media Access Control address

C. Packet Layer Proto col address

D. Network Service Access Point address

E. Authority and Format Identifier address

参考答案：D

第2题：

For each blank，choose the best answer from the four choices and write down on the answer sheet.
（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
（请作答此空）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
（）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands.
（）is the popular LAN developed under the direction of the IEEE 802.5.
（）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

A.ISO
B.ANSI
C.CCITT
D.IEEE

答案：D

解析：

MAC地址就是在媒体接入层上使用的地址，通俗点说就是网卡的物理地址，现在的MAC地址一般都采用6字节48bit。
IEEE是由多个研究底层协议的机构组成的权威组织。
以太网是共享介质的，物理层接收帧，如果地址和自己的地址一致（或者是广播消息），就留下；反之则转发。因此当主机的数量增加时，网络就会变得十分嘈杂，传送效率明显降低。而网桥是工作在数据链路层的设备，它将一个大型的以太网分为几个小网段，可以取得减少通信量的作用。
令牌环网是一种符合IEEE802.5标准的局域网。监督帧，即令牌，顺序地从一个网站传递到相临的网站上。希望获得网络访问权的网站必须等到令牌到达之后才能传输数据。
光纤分布数据接口是目前成熟的LAN技术中传输速率最高的一种。这种传输速率高达100Mb/s的网络技术所依据的标准是ANSIX3T9.5。该网络具有定时令牌协议的特性，支持多种拓扑结构，传输媒体为光纤。使用光纤作为传输媒体具有多种优点：
较长的传输距离，相邻站间的最大长度可达2km，最大站间距离为200km。
具有较大的带宽，FDDI的设计带宽为100Mbit/s。
具有对电磁和射频干扰抑制能力，在传输过程中不受电磁和射频噪声的影响，也不影响其他设备。
光纤可防止传输过程中被分接偷听，也杜绝了辐射波的窃听，因而是最安全的传输媒体。

第3题：

is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication。

A．The virtual address

B．The subnet address

C．The MAC address

D．The IP address

正确答案：C
解析：MAC地址是一个OSI第2层(即数据链路层)6个字节的地址，提供点对点通信时唯一地标识每个网络设备。

第4题：

Which two statements are true when the extended system ID feature is enabled？（）

A、The BID is made up of the bridge priority value（two bytes） and bridge MAC address （six bytes）.
B、The BID is made up of the bridge priority （four bits）， the system ID （12 bits）， and a bridge MAC address （48 bits）.
C、The BID is made up of the system ID （six bytes） and bridge priority value （two bytes）.
D、The system ID value is the VLAN ID （VID）.
E、The system ID value is a unique MAC address allocated from a pool of MAC addresses assigned to the switch or module.
F、The system ID value is a hex number used to measure the preference of a bridge in the spanning-tree algorithm.

正确答案:B,D

第5题：

For each blank，choose the best answer from the four choices and write down on the answer sheet.
（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
（）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
（请作答此空）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands.
（）is the popular LAN developed under the direction of the IEEE 802.5.
（）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

A.The hub
B.The bridge
C.The router
D.The proxy

答案：B

解析：

第6题：

Refer to the exhibit. Which three statements correctly describe Network Device A?()

A.With a network wide mask of 255.255.255.128, each interface does not require an IP address.

B.With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.

C.With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other.

D.With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.

E.With a network wide mask of 255.255.254.0, each interface does not require an IP address.

参考答案：B, D

第7题：

For each blank，choose the best answer from the four choices and write down on the answer sheet.
（请作答此空）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
（72）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
（73）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands.
（74）is the popular LAN developed under the direction of the IEEE 802.5.
（74）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

A.The MAC address
B.The IP address
C.The subnet address
D.The virtual address

答案：A

解析：

第8题：

OSI is a theoretical model that shows how any two different systems can communicate with each other. Router, as a networking device, operate at the ______ layer of the OSI model.

A．transport

B．application

C．network

D．physical

正确答案：C

第9题：

Access Point R1 is an Aironet 1200 that has been converted from autonomous mode to LWAPP mode. After this conversion， which two statements are true？（）

A、 LWAPP-enabled access points can still communicate with Wireless Domain Services （WDS） devices.
B、 An LWAPP-enabled access point console port provides read-only access to the unit.
C、 LWAPP-enabled access points support Layer 2 LWAPP.
D、 LWAPP-enabled access points must get an IP address and discover the controller using DHCP， DNS， or an IP subnet broadcast.
E、 An LWAPP-enabled access point console port provides read-write access to the unit.

正确答案:B,D

第10题：

In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）

A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application
B、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
C、To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0
D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

正确答案:C,D

（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

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（ ）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

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（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.