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CS4550 Computer Networks II Topics In Applications Ref: Feit Chap 13-20 Tanenbaum Chap 7

CS4550 Computer Networks II Topics In Applications Ref: Feit Chap 13-20 Tanenbaum Chap 7. General Architecture. Clients, requestor programs. Servers, demon, reply peer. Telnet FTP SNMP E-mail WWW. Telnet FTP SNMP E-mail WWW. From Port 23. To port 23. TCP UDP IP

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CS4550 Computer Networks II Topics In Applications Ref: Feit Chap 13-20 Tanenbaum Chap 7

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  1. CS4550 Computer Networks IITopics In ApplicationsRef: Feit Chap 13-20Tanenbaum Chap 7

  2. General Architecture Clients, requestor programs Servers, demon, reply peer Telnet FTP SNMP E-mail WWW Telnet FTP SNMP E-mail WWW From Port 23 To port 23 TCP UDP IP DL and physical TCP UDP IP DL and physical From Protocol 6 To protocol 6

  3. Common Tools Ping Echo 7/udp netstat time 13/udp traceroute tracert quote 17/udp

  4. TELNET First Application Connect as a terminal to a networked host Terminal emulation Telnet to selected port Commands

  5. Connect as a terminal to a networked host NVT - Network Virtual Terminal Solves Multi vendor problem NVT code - 7 bit USASCII 128 characters Line Format- half duplex, stop and wait, <CR><LF> Command Format - Interpret As Command (IAC) Escape character IAC = 255 note 8’th bit set IAC Command option 255 251 24 will terminal type

  6. Terminal emulation

  7. Connect to a selected port Telnet cs.nps.navy.mil 7 echo service telnet cs.nps.navy.mil 13 time of day service telnet cs.nps.navy.mil 80 www service telnet cs.nps.navy.mil 25 mail service type help

  8. Telnet Commands get a list of commands Wolf> telnet telnet > ?

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