CR系统用成像板(IP)来接收X线的模拟信息，然后经过模／数转换来实现影像的数字化。对IP的曝光过程就是信息采集。

关于IP的叙述错误的是

A:IP作为辐射接收部件替代了常规X线摄影用的胶片 B:IP在X线下受到第一次激发时储存连续的模拟信息 C:IP被扫描后所获得的信息可以同时进行存储和打印 D:曝光后的成像板，由于吸收X线而发生电化学反应 E:IP的影像数据可通过施加强光照射来消除

如何使Star2624路由器启用IP路由？（）

A:router（config）#ip routing B:router（config）#ip init C:Router（config）#route ip D:touter（config）#ip route

Traditional IP packet forwarding analyzes the （1）IP address contained in the network layer header of each packet as the packet travels from its source to its final destination. A router analyzes the destination IP address independently at each hop in the network. Dynamic （2） protocols or static configuration builds the database needed to analyze the destination IP address (the routing table). The process of implementing traditional IP routing also is called hop-by-hop destination-based（3） routing. Although successful, and obviously widely deployed, certain restrictions, which have been realized for some time, exist for this method of packet forwarding that diminish its （4）. New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure. This first chapter concentrate on identifying these restrictions and presents a new architecture, known as multipleprotocol （5）switching, that provides solutions to some of these restrictions.

（2）是（）

A:routing B:forwarding C:transmission D:management E:

Traditional IP packet forwarding analyzes the____(1)____IP address contained in the network layer header of each packet as the packet travels from its source to its final destination．A router analyzes the destination IP address independently at each hop in the network．Dynamic ____(2)____protocols or static configuration builds the database needed to analyze the destination IP address(the routing table)．The process of implementing traditional IP routing also is called hop—by—hop destination—based____(3)____routing．Although successful，and obviously widely deployed，certain restrictions，which have been realized for some time，exist for this method of packet forwarding that diminish its____(4)____．New techniques are therefore required to address and expand the functionality of an IP—based network infrastructure．This first chapter concentrate on identifying these restrictions and presents a rew，architecture，known as multipIeprotocol____(5)____switching，that provides solutions to some of these restrictions．(2)

A:routing B:forwarding C:transmission D:management

试题(57)～(60) 某网络拓扑结构如下图所示。 在路由器陇上采用命令____(57)____得到如下所示结果。 则PC1可能的IP地址为____(58)____，路由器R1的SO口的IP地址为____(59)____，路由器R1和R2之间采用的路由协议为____(60)____。 57（）

A:netstat-r B:show ip route C:ip routing D:route print

Traditional network layer packet forwarding relies on the information provided by network layer （） protocols, or static routing, to make an independent （） decisions at each hop within the network. The forwarding （） is based solely on the destination（） IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （） toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.

Traditional network layer packet forwarding relies on the information provided by network layer routing protocols, or static routing,to make an independent （） decisions at each hop within the network

A:forwarding B:connecting C:routing D:killing

Traditional network layer packet forwarding relies on the information provided by network layer （） protocols, or static routing, to make an independent （） decisions at each hop within the network. The forwarding （） is based solely on the destination（） IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （） toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.

Traditional network layer packet forwarding relies on the information provided by network layer routing protocols, or static routing,to make an independent （） decisions at each hop within the network

A:forwarding B:connecting C:routing D:killing

Which routing algorithm is described belowIt is a mechanism in which the sending station determines the route the frame will follow andincludes the routing information with the flame；bridges read the routing information to determineif they should forward the frame．

A:Fixed Routing B:Spanning Tree C:Source Routing D:Frame Forwarding