In the field of computer network communications, a firewall is a device that helps ensure the security of information. It will allow or restrict the transmission of data in accordance with specific rules. Xiao Zhang installed firewall software on his computer. The following statements are correct:. ["Firewall software may prevent Xiao Zhang's computer from accessing specific web sites.", 'The firewall software may cause Xiao Zhang to be unable to access the documents stored on the hard disk of his computer.', 'Firewall software makes Xiao Zhang not easy to be deceived by false advertisements when shopping online.', 'Firewall software allows Xiao Zhang to disguise his gender and name when chatting with strange netizens.']