9_30 telnet CGI

9_30 telnet CGI - Datagram service type UDP Udp datagram...

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Datagram service: type UDP? Udp datagram TCP: byte stream service can deliver any ip address to any ip and TCp? TCP attach to a TCP port. TCP its like a phone call. TCP is bi directional : send back and forth to hosts http: web browser, every time u go to a website. When u hit return on url, web browser is an application, makes systems calls . library of functions that a program can call. Want to connect to that website over http” fire fox opens a tcp connection, . url: the name. if u know the ip address u can substitute it for the name. need to figure out what ip address is it when giving name DNS,----------- bleh Ip address of the dns server. www.yahoo.com I need to know the ip address. Sees that request sends u back a reponse. www. Basld. Com is blah blah blah. www.yahoo.com for mirrors. Use dns for load balancing . the standard thing is http: the most common protocol, port 80, http is text based a text command is sent over open a port to port 80 connect to the website load the website? Most objects that are transferred are over TCP
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This note was uploaded on 11/02/2011 for the course ECE 158a taught by Professor Cruz during the Spring '11 term at UCSD.

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9_30 telnet CGI - Datagram service type UDP Udp datagram...

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