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Introduction to Packet Accelerator (PA)

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Page 1: Introduction to Packet Accelerator (PA). 7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer

Introduction toPacket Accelerator (PA)

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

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

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

7 Application Layer6 Presentation Layer5 Session Layer4 Transport Layer3 Network Layer2 Data Link Layer1 Physical Layer

The 7 layers of OSI (Open Systems Interconnection)

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

Layer 4 - UDP, TCP, DCCP, SCTP

Port Protocol Usage1 TCP/UDP TCPMUX (TCP port Service Multiplexer)20 TCP FTP25 TCP SMTP (simple mail transfer protocol)67-68 UDP BOOTP (also used as DHCP)69 UDP TFTP (Trivial FTP)80 TCP HTTP (Hypertext Transfer Protocol)109 TCP POPv2 (Post office protocol)110 TCP POPv31023 TCP/UDP reserved1024-49151 TCP/UDP Registered ports 49152-65535 TCP/UDP Dynamic or private ports

Some Common Ports

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

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

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

Destination MAC address

6 bytes

Source MAC address 6

Bytes

Preamble 7 bytes

SOF (start of Frame) 1 byte

Frame Check Sequence – CRC 4 bytes

Type of higher

Protocol2 bytes

Data46-1500

bytes

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

Page 8: Introduction to Packet Accelerator (PA). 7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer

Sending and receiving a packet

Application/preentation/session

Transport Layer – Layer 4 Port number and check sum

Network layer – layer 3 IP address

Data link layer – layer 2 MAC address and FCS

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