Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] packets 2nd 3rd 4th 5th acknowledgement numbers encapsulation error recovery forward acknowledgement headers IP 2nd header sequence numbers versus segments PAP 2nd 3rd passwords clear-text patch panels PCs (personal computers) phones comparing with modems 2nd physical connectivity 2nd cabling cross-over cabling connectors 2nd 3rd structured wiring plans 2nd 3rd physical LANs creating 2nd pins PIX Firewall point-to-point links POP (point of presence) POP3 2nd and SMTP port numbers TCP 2nd PPP PPP (Point-to-Point Protocol) preamble print servers print services proprietary networking models 2nd protocols PSTN public networking models TCP/IP IP 2nd TCP PUT command (FTP) PVCs CIR |