7. Application Layer - DHCP, DNS, FTP, HTTP, IMAP4, NNTP, POP3, SMTP, SNMP, SSH, TELNET and NTP This layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services., HTTP, IMAP4, NNTP, POP3, SMTP, SNMP, SSH, TELNET and NTP 6. Presentation layer – SSL, WEP, WPA, Kerberos, 5. Session layer - Logical Ports 21, 22, 23, 80 etc. 4. Transport - TCP, SPX and UDP 3. Network - IPv4, IPV6, IPX, OSPF, ICMP, IGMP and ARP 2. Data Link - 802.11 (WLAN), Wi-Fi, WiMAX, ATM, Ethernet, Token Ring, Frame Relay, PPTP, L2TP and ISDN 1 - Physical - Bit stream: physical medium, method of representing bits 1. Physical - Hubs, Repeaters, Cables, Optical Fiber, SONET/SDN,Coaxial Cable, Twisted Pair Cable and Connectors |
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