TCP/IP | Tech Info | Network Information | TCP protocol | Addressing | Well Known Ports |
Transmission Control Protocol/Internet Protocol (TCP/IP) -
A collection of protocols, including the TCP, IP, e-mail, file transfers and others which makes possible the communication between differently configured computers and operating systems.
For an explanation of TCP Addressing see the TCP/IP mask addressing page.
For the TCP/IP "Well Known Ports" see the "TCP/IP Well Known Ports" page.
- Flow control using sliding windows
- Is acknowledged, full-duplex, connection-oriented
- IP uses Time-to-Live to limit the length of a datagram's life
- Both the network and node addresses are included in the IP address
- TCP/IP functions at the layers above the Physical and Data-Link Layers of the OSI model.
The TCP packet Breakdown
Item 0-31 Source Port 32-63 Destination Port 64 - 95 Sequence # 96 - 127 Acknowledgement # 128 - 131 Data Offset 132 - 137 Reserved 138 URG 139 ACK 140 PSH 141 RST 142 SYN 143 FIN 144 - 159 Windows 160-175 Checksum 176 - 191 Urgent Pointer 192 - 223 Options/Padding 224 - Data ---
- Functions at the Network Layer of the OSI model
- Offer Datagram services
- Uses RIP
- Is a connectionless protocol
- Limits how long a packet can exist on the network
Included in TCP/IP are also the following protocols:
- Remote Terminal Emulation -
- File Transport Protocol (FTP)
- Trivial File Transfer Protocol (TFTP).
- Simple Mail Transfer Protocol (SMTP).
- Remote Procedure Calls (RPCs).
- Routing Information Protocol (RIP).
- eXternal Data Representation (XDR).
- Network File System (NFS).
- Internet Control Message Protocol (ICMP).
- Echo Request/Reply - The PING utility uses ICMP to determine whether an IP address is reacheable and if the node is responding.
- Destination Unreachable - ICMP reports when the destination was not reached
- Time Exceeded - Reports to the sender when a packet's Time-to-Live has expired.
- Redirect - If a better route is found for the packet ICMP reports it back to the router.
- Source Quench - ICMP requests the sender to decrease the sending rate if data cannot be received fast enough.
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