OSI Network Model

1
OSI Network Model

• FTP / Telnet
• HTML/MPEG/ASCII
• NFS/Netbios Name
• TCP/UDP/SPX
• IP/IPX/Apple DDP
• HDLC/PPP/ATM/802.3
• V.35/V.22/Ethernet/FDDI

Application
7
Presentation
6
Session
5
Transport
4
Network
3
Packets
Data Link (LLC and MAC)
2
Frames
Physical
1
Bits
2
IEEE 802 Standards

• 802.1 - Standards introduction
• 802.2 - Logical Link Control (LLC) - to prevent
  senders from overwhelming receivers (ACK) see
  the Data Link sublayer of the OSI model- stop and
  wait/sliding window
• 802.3 - Ethernet - CSMA/CD, multiple media access
  methods, and packet (frame) format.
• 802.4 - Token Bus - 75 ohm CATV coax or Fiber
• 802.5 - Token Ring - physical standard and media
  access sublayer
• 802.6 - MAN (Metropolitan Area Network) - similar
  to FDDI
• 802.7 - Broadband
• 802.8 - Fiber Optics
• 802.9 - Integrated Voice and Data
• 802.10 - LAN Security
• 802.11 - Wireless
• 802.12 -100 VG AnyLAN

3
Cisco/Novell Encapsulation
4
LAN Switching

• http//www.cisco.com/univercd/cc/td/doc/cisintwk/i
  cs/cs010.htm

5
ISDN

• http//www.cisco.com/univercd/cc/td/doc/cisintwk/i
  to_doc/isdn.htm