Introduction to Packet Accelerator (PA). 7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer.

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Presentation transcript:

Introduction to Packet Accelerator (PA)

7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer 1 Physical Layer The 7 layers of OSI (Open Systems Interconnection)

Layer 4 - UDP, TCP, DCCP, SCTP PortProtocolUsage 1TCP/UDPTCPMUX (TCP port Service Multiplexer) 20TCPFTP 25TCPSMTP (simple mail transfer protocol) 67-68UDPBOOTP (also used as DHCP) 69UDPTFTP (Trivial FTP) 80TCPHTTP (Hypertext Transfer Protocol) 109TCPPOPv2 (Post office protocol) 110TCPPOPv3 1023TCP/UDPreserved TCP/UDPRegistered ports TCP/UDPDynamic or private ports Some Common Ports

Layer 3 - Ipv4, Ipv6, ICMP, ICMPv6, ECN,IGMP IpSec (tunneling) – encryption of the IP addresses and assign new IP addresses (virtual Private Network) Same destination might have multiple new IP addresses

Layer 2 - Ethernet 802.3, Token Ring 802.5, PPP, X.25, FDDI, ISDN, Frame Relay ECN,IGMP

Sending and receiving a packet

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