IP routing
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RIP - Routing Information Protocol (RFC 1058)
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OSPF - Open Shortest Path First (RFC 1247)
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EGP - Exterior Gateway Protocol (RFC 904)
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Transport layer: TCP / UDP
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port numbers are used to identify applications; on Unix port numbers are defined in /etc/services; well-known ports:
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21 (ftp), 23 (telnet), 25 (smtp), 80 (www), 119 (nntp), 123 (ntp)
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sockets - a combination of IP address and port number
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Other Protocols
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DHCP - Dynamic Host Configuration Protocol designed (Microsoft) to centrally manage IP addresses on the network by allocating them dynamically whenever a client requires one. DHCP maintains a database of the addresses reserved and leased to clients.
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BOOTP- Booting Protocol (RFC 951)
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SNMP - Simple Network Management Protocol SNMP v1,2,3
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