An internet is a combination of networks connected by （71） . When a datagram goes from a source to a （72） , it will probably pass many （73） until it reaches the router attached to the destination network. A router receives a （74） from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available （75） is the optimum pathway?

（71）

A． modems

B． routers

C． switches

D． computers

（72）

A． user

B． host

C． city

D． destination

（73）

A． destinations

B． routers

C． packets

D． computers

（74）

A． destination

B． resource

C． packet

D． source

（75）

A． pathways

B． routers

C． diagrams

D． calls

[单选题]A．n internet is a combination of networks connected by()A．modemsB．routersC．switchesD．computers

[单选题]A．n internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pass many (73) until it reaches the router attached to the destination network．A router receives a (74) from a network and pas

[单选题,共用题干题] An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and

[单选题]Business risk is the combination of:A.Operating risk and financial risk.B.S

[单选题](75) is the combination of computer and video technology.(75)A．MultimediaB．DisplayC．CommunicationD．Internet

[名词解释] 荷载组合（load combination）

[问答题] 组合育种（combination breeding）

[单选题]The(71)is a combination of keys that allows the user to activate a program function without clicking a series of menus options.(71)A.shortcut-keyB．quick-keyC．fast-keyD．rapid-key

[单选题]A combination of interest rate calls is referred to as an interest rate:A.c

[主观题]最优投人品组合（Optimal input combination）