by mortiz


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Application, presentation, session (Layers 5-7)
Telnet, HTTP, FTP, SMTP, POP3, VoIP, SNMP
Transport (Layer 4)
TCP, UDP
Network (Layer 3)
IP
Data link (Layer 2)
Ethernet (IEEE 802.3), HDLC, Frame Relay, PPP
Physical (Layer 1)
RJ-45, EIA/TIA-232, V.35, Ethernet (IEEE 802.3)
x of y cards