1. FUNCTIONS OF OSI LAYERS T S Pradeep Kumar VIT Chennai http://www.pradeepkumar.org

2. PHYSICAL LAYER Representation of bits Data Rate Synchronization of bits line configuration physical topology Transmission mode Eg: IEEE802.1x, PON, OTN, DSL, USB, Bluetooth, etc

3. DATA LINK LAYER Framing physical addressing flow control error control access control Eg: LLC, Frame relay, PPP, ATM,

4. NETWORK LAYER logical addressing routing Eg: IPv4, IPv6, ICMP, IGMP, IPX, AppleTalk

5. TRANSPORT LAYER Service point addressing segmentation and reassembly connection control flow control error control TCP, UDP, SCTP, DCCP

6. SESSION LAYER dialog control synchronization Named Pipe, NetBIOS, RTP, SOCKS

7. PRESENTATION LAYER translation encryption compression MIME, XDR

8. APPLICATION LAYER network virtual terminal file transfer, access and management email services directory services NFS, SMTP, SNMP, Telnet, DHCP, HTTP, FTP

9. Questions????