在下列指标中，属于反映企业盈利能力的指标有()。

A、ask directly for the home address of people you are talking with

B、ask to connect on Facebook, WeChat, etc.

C、share the name card

D、share the phone number

r devices participate it the collection and distribution of network-layer information, and perform Layer 3 switching based on the contents of the network layer （） of each packet. You can connect the routers directly by point-to-point （） or local-area networks, or you can connect them by LAN or WAN switches. These Layer 2 switches unfortunately do not have the capability to hold Layer 3 （） information or to select the path taken by a packet through analysis of its Layer 3 destination address. Thus, Layer 2 switches be involved in the Layer 3 packet （） decision process.

A.application B. network C.physical D.link A.header B.connection C.protocol D.data A.medium B.links C.switches D.carriers A.network B.links C.protocol D.routing A.switching B.processing C.forwarding D.connecting

A.Basic router

B.Basic switch

C.Bridge

D.Repeater

According to the SOLAS convention, the bilge water system .

A.must connect the bilge well suction directly

B.should not pump out the water accumulated in the cargos

C.should not used for emergency drainage in case of ship collision

D.should connect to the fire fighting system directly

A．repeater

B．bridge

C．switch

D．router

Once you can't see any use out of the word you take at random, ______.

A．try to take another random word

B．keep trying to connect it to the present problem

C．look for a proper word to your problem

D．replace the word with a picture or an object at once

A router that performs Network Address Translation (NAT) is installed between your computer and the Internet.The router fails. You connect the computer directly to the Internet.You need to ensure that the computer is connected to the Internet in the most secure manner possible.What should you do？（）

A.A

B.B

C.C

D.D