何谓e-Commerce？（）

A .  core layer B .  Internet boundary C .  aggregation layer D .  aggregation and core layers E .  access and aggregation layer

A . by tracking the status of objects along the path to the e-commerce module B . by detecting undesirable conditions along the path to the e-commerce module C . by using the MED to communicate the site preferences for traffic to multiple ISPs D . by communicating the available prefixes， routing policies， and preferences of each site to its ISP E . by moving the SLB to a position where selected traffic to and from the servers does not go through the SLB

A . 正确 B . 错误

A . core layer B . Internet boundary C . aggregation layer D . aggregation and core layers E . access and aggregation layer

A .  Routing is mostly static. B .  Hardcoded IP addresses are used to support failover. C .  Inbound servers use the CSM or ACE as the default gateway. D .  VLANs between the access layer switches are used for FHRP protocols.

A . 正确 B . 错误

A . core layer B . Internet boundary C . aggregation layer D . aggregation and core layers E . access and aggregation layer

A . secure transactions B . time to market C . maximum uptime D . database backups E . revenue growth F . scalability for future growth

A .  Routing is mostly static. B .  Hardcoded IP addresses are used to support failover. C .  Inbound servers use the CSM or ACE as the default gateway. D .  VLANs between the access layer switches are used for FHRP protocols.

A .  Routed mode requires the ACE run OSPF or EIGRP B .  Bridged mode switches a packet between the public and the private subnets when it sees itsMAC address as the destination C .  Two-armed mode will place the SLB inline to the servers， with different client-side and a server-side VLANs D .  One-armed mode， which uses the same VLAN for the client， the ACE， and the servers， requiresa traffic-diversion mechanism to ensure the traffic return from the server passes though the ACE

A . Routing is mostly static. B . Hardcoded IP addresses are used to support failover. C . Inbound servers use the CSM or ACE as the default gateway. D . VLANs between the access layer switches are used for FHRP protocols.

According to a new report by Forrester Research, e-commerce sales are【C1】______. to grow 11% , to ＄ 156 billion, in 2009. That【C2】______a slowdown from 13% growth last year and 18% in 2007. The major factor【C3】______to the pace shift is, of course,【C4】______consumer confidence. But e-commerce's slowed pace is, still【C5】______better than the National Retail Federation's【C6】______0.5% drop in overall retail sales this year. That means e-commerce is stealing market share from【C7】______retail -- and fast. By Forrester's estimates, in 2008 e-commerce【C8】______for 5% of all retail sales. In 2012, Forrester thinks ecommerce could have an 8%【C9】______. One recent factor is that online shopping promises bargains to price-sensitive consumers. 'The recession is definitely【C10】______more consumers to do their homework【C11】______they go and complete a purchase, ' says Forrester analyst Sucharita Mulpuru. E-commerce is also【C12】______protected because online shoppers tend to be wealthier: about half of all online shopping is done by households that earn more than ＄ 75,000 per year,【C13】______though they're just about a【C14】______of all households with Internet access. 【C15】______not all Internet companies are set to benefit equally. Last month, e-commerce【C16】______eBay posted its first-ever quarterly revenue decline,【C17】______Amazon reported a sales surge of 18%.Smaller players are particularly【C18】______risk. 'There are some pretty vicious wars as companies go online and duke it out to get market share,' says Mulpuru. 'The【C19】______I have is that we could go back down the spiral of death from 1999 and 2000, when companies would under-price themselves without thinking about【C20】______. 【C1】 A．hardly B．likely C．centainly D．seemly

E-commerce involves exchange among () A．customers B． vendors C． business partner D．corporate infrastructure 此题为多项选择题。

In e-commerce, supplier interacts with () A．manufacturer B．customer C． shipment provider. D．distributors.

A．A large number of online buyers do not pay with credit cards. B．Online auction customers do their business without seeing each other. C．China is not fully prepared for e-commerce. D．Credit ratings are not reliabl

是 否

是 否