Which of us_knows something about physics does not know this（）

A .  class of service B .  bandwidth profiles C .  user-network interface D .  Ethernet LAN circuit attributes E .  Ethernet virtual circuit attribute

A . Hierarchical OSPF networks need to be in one area B . Multiple OSPF areas must connect to area 0 C . Single area OSPF networks must be configured in area 1 D . Areas can be assigned any number from 0 to 63535 E . Area 0 is called the backbone area F . Each OSPF area need to be configured with a loopback interface

A . They increase the size of collision domains. B . They allow logical grouping of users by function. C . They can enhance network security, D . The increase the size of broadcast domains while decreasing the number of the broadcast domains. E . The increase the number of broadcast domains while decreasing the size of the broadcast domains. F . They simplify switch administration.

A .  It will only become active after a software failure. B .  It will only become active after a hardware failure. C .  It requires that Cisco NSF be enabled in order to work successfully. D .  It synchronizes the MAC·， FIB·， and adjacency tables between Active and Standby RouteProcessors.

A . The wires in each pair are wrapped around each other B . An insulating material covers each of the individual copper wires in it C . It comes in eight-pair wire bindles D . EMI and RFI cause only limited degradation to signals running over it E . It comes in seven categories F . IT has an external diameter of approximately 0 28 inche

A .  Layer 3 MPLS VPNs can forward only IP packets B .  Layer 2 MPLS VPNs can forward any network protocol C .  MPL S label paths are automatically formed based on Layer 2 frames D .  Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 frames E .  In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policie

A . can be used over analog circuits B . maps Layer 2 to Layer 3 address C . encapsulates several routed protocols D . supports IP only E . provides error correctio

A .  buffering B .  cut-through C .  windowing D .  congestion avoidance E .  load balancing

A . class of service B . bandwidth profiles C . user-network interface D . Ethernet LAN circuit attributes E . Ethernet virtual circuit attribute

A . non-registered users B . stores C . organizations D . products E . access grou

A .  multicast routing uses RPF B .  multicast routing is connectionless. C .  In multicast routing， the source of a packet is known. D .  When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath E .  Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destinatio

A . buffering B . cut-through C . windowing D . congestion avoidance E . loadbalancing

A . The righting arms at various angles of inclination and displacement B . The metacentric height at large angle of heel C . The height of the center of buoyancy at various angles D . The metacentric radius at various angle

A . The righting arms at various angles of inclination and displacement B . The metacentric height at large angles of heel C . The height of the center of buoyancy at various angles D . The metacentric radius at various displacement

A .  -27 -- 27-1 B .  0 -- 216-1 C .  -215 -- 215-1 D .  -231 -- 231-1

A．It is responsible for pricing the items for rent. B．It develops vigorously in the past few years. C．It provides insurance for valuable items rented. D．It offers the fastest car rental services in France.

A．A.Itsaves costs and reduces travel tim B．B.Itimproves motivation and productivity. C．C.It better balances work and family lif D．D.How to manage teleworkers and evaluate their performance is still a problem.

A、A. Personal information B、B. salutation C、C. Job objectives D、D. Work experience