Avirtual(71)network,orVPN,isanencryptedconnectionovertheInternetfromadevicetoanetwork.Theencryptedconnectionhelpsensurethatsensitivedataissafely(72).Itprevents(73)peoplefromeavesdroppingonthetrafficandallowstheusertoconductworkremotely.TrafficonthevirtualnetworkissentsecurelybyestablishinganencryptedconnectionacrosstheInternetknownasa(74).AremoteaccessVPNsecurelyconnectsadeviceoutsidethecorporateoffice.Asite-to-siteVPNconnectsthecorporateofficetobranchofficesovertheInternet.Site-to-siteVPNsareusedwhendistancemakesitimpracticaltohavedirectnetworkconnectionsbetweentheseoffices.Thinkofsite-to-siteaccessas(75)tonetwork.
A.public
B.private
C.personal
D.proper
正确答案是B