Lowest IP address
Highest IP address
Lowest MAC address
Highest MAC address
第1题：
A socket is composed of two addresses:(72)。
A．MAC address and IP address
B．MAC address and port address
C．port number and IP address
D．E-mail address and IP address
第2题：
Each machine in the ineternet is assigned a unique network address, called__(71)__,that is used to identify the machine for communication purposes.
A.MAC address
B.IP address
C.host address
D.domain name address
第3题：
文中（ 1 ）处正确的答案是（ ）。
A．The MAC address
B．The IP address
C．The subnet address
D．The virtual address
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(在早期还有2字节16bit的MAC地址)的形式。
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(Token Ring)是一种符合IEEE 802.5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(FDDI)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2 km，最大站间距离为200 km。
·具有较大的带宽，FDDI的设计带宽为100 Mbit/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，也桂绝了辐射波的窃听，因而是最安全的传输媒体。
第4题：
A.Switch A ,because it has the lowest MAC address
B.Switch C,because it has the lowest priority
C.Switch B,because it has the highest MAC address
D.Switch C,because it is the most centrally located switch
E.Switch A,because it is the most centrally located switch
F.Switch D,because it has the highest priority
第5题：
A. To ma a known IP address to a MAC address
B. To map a known DLCI to a MAC address
C. To ma a known MAC address to an IP address
D. To ma a known DLCI address to a IP address
E. To ma a known IP address to a SPID address
F. To ma a known SPID address to a MAC address
第6题：
Each machine in the internet is assigned a unique network address,called（）,that is used to identify the machine for communication purposes
A.MAC address
B.IP address
C.host address
D.domain name address
第7题：
A. lowest IP address
B. highest IP address
C. lowest MAC address
D. highest MAC address
第8题：
文中（ 3 ）处正确的答案是（ ）。
A．Email address and IP address
B．MAC address and port address
C．MAC address and IP address
D．port number and IP address
第9题：
A. the switch with the lowest MAC address
B. the switch with the higest MAC address
C. the switch witch the higest IP address
D. the switch with the lowest IP address
第10题：
A.to map a known DLCI to an IP address
B.to mapa known IP address to a MAC address
C.to map known SPID toa MAC address
D.to map a known DLCI to a MAC address
E.to map a known IP address to a SPID
F.to mapa known MAC address to an IP address