[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fM_zpmFKRSHymic4UotdyMJtrb7KVKte_oXjNAFkeSRk":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":16,"question":23,"related":24,"source":34,"type":39},[],"2024-01-18 10:53:10",101536154,[8,9,10,11,12,13,14,15],"Is able to use a persistent TCP connection to transfer multiple objects","Operates mostly as a "client pull" protocol","Uses server port 25","Uses server port 80","Uses a blank line (CRLF) to indicate end of request header","Has ASCII command\u002Fresponse interaction, status codes","Operates mostly as a "client push" protocol","Uses CRLF.CRLF to indicate end of message",{"count":17,"courseId":18,"courseImg":19,"courseName":20,"workId":21,"workName":22},18,"e72831d5ae79f0dc59ef12579266df0f","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F229b271893d56f55c5e4953c78fb2f20.png","计算机网络-自顶向下","work_30336809","SMTP POP","Which of the following characteristics apply to HTTP only (and do not apply to SMTP)? Note: check one or more of the characteristics below",[25,36,40,47,52,58,63,68,73,78],{"answer":26,"createTime":5,"id":27,"options":28,"question":33,"source":34,"type":35},[],101510308,[29,30,31,32],"2.5","3.5","2","3","How many RTTs are there from when a client first contacts an email server (by initiating a TCP session) to when the client can begin sending the email message itself – that is following all initial TCP or SMTP handshaking required? Recall the figure below from our class notes: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7c883fe109815c32bbc2712a673ea27.png\">","v1",0,{"answer":37,"createTime":5,"id":6,"options":38,"question":23,"source":34,"type":39},[],[8,9,10,11,12,13,14,15],1,{"answer":41,"createTime":42,"id":43,"options":44,"question":45,"source":34,"type":46},[],"2023-10-25 20:40:26",101536158,[],"HTTP response status codes ( ) OK request succeeded, requested object later in this msg",2,{"answer":48,"createTime":42,"id":49,"options":50,"question":51,"source":34,"type":46},[],101536161,[],"FTP commands, responses: RETR filename ( ) (gets) file",{"answer":53,"createTime":54,"id":55,"options":56,"question":57,"source":34,"type":46},[],"2023-12-05 19:41:33",101536164,[],"RTT: Round-( ) Time: 往返时间",{"answer":59,"createTime":42,"id":60,"options":61,"question":62,"source":34,"type":46},[],101536167,[],"mail server port numbers( )",{"answer":64,"createTime":42,"id":65,"options":66,"question":67,"source":34,"type":46},[],101536169,[],"TCP service provide ( ) control、congestion control",{"answer":69,"createTime":42,"id":70,"options":71,"question":72,"source":34,"type":46},[],101536171,[],"Match the functionality of a protocol with the name of a the email protocol (if any) that implements that functionality. Pushes email from a mail client to a mail server. Pulls mail from one mail server to another mail server. Pulls email to a mail client from a mail server. ANSWER LIST: IMAP SMTP Neither SMTP nor IMAP does this",{"answer":74,"createTime":42,"id":75,"options":76,"question":77,"source":34,"type":46},[],101536174,[],"IMAP: Internet ( ) Protocol",{"answer":79,"createTime":54,"id":80,"options":81,"question":82,"source":34,"type":46},[],101536178,[],"SSL- Security ( ) Layer 加密套接字协议层"]