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Sockets and Ports. …for dummies. Kramer Ritchie Matthew lowery Devon bercegeay. :80. Sockets. …Not that kind of socket. TCP/IP Protocol. Table 4-3 Commonly used TCP/IP port numbers. Well-known Ports. Registered Ports. Dynamic Ports. Open/listening port. Netstat - AN. sockets. - PowerPoint PPT Presentation
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Sockets and Ports…for dummies
Kramer RitchieMatthew loweryDevon bercegeay
PORTS
ports are 16-bit numbers between 0 and 65535 assigned to a particular
TCP/IP secession:80
Sockets
…Not that kind of socket
used as a unique address required by A tcp/ip communication process
A socket is a process’s port number plus its host machine’s IP address
TCP/IP ProtocolConnection-oriented subprotocol
Ensures reliable data delivery
Well-known Ports
Table 4-3 Commonly used TCP/IP port numbers
Range • 0-1023
Use • Operating system or Administrative
Registered PortsPort number range: 1024 to 49151less administrative privileges
Dynamic PortsPort number
range: 49152 – 65535
Also known as private ports
Open/listening port
Responds to any IP Packets destined for a specific port number
Shows that port is ready for packets
Netstat - AN
sockets
Socket SocketPair
Stored in RAM
Keeps track of status of communication
Sockets10.43.3.87 :80
Host Computer’s IP Address: Port Number:
Socket:
Why is this necessary?
The two computers communicating need to know:
where to send information
where to receive information
NEtstatThe Netstat utility allows users to see who their computers are connected to by viewing their sockets