blank.gif (43 bytes)

Church Of The
Swimming Elephant

Search:
4.2.5 TCP REQUIREMENT SUMMARY Connected: An Internet Encyclopedia
4.2.5 TCP REQUIREMENT SUMMARY

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1122
Up: 4. TRANSPORT PROTOCOLS
Up: 4.2 TRANSMISSION CONTROL PROTOCOL -- TCP
Prev: 4.2.4.4 Multihoming
Next: 5. REFERENCES

4.2.5 TCP REQUIREMENT SUMMARY

4.2.5 TCP REQUIREMENT SUMMARY

                                                 |        | | | |S| |
                                                 |        | | | |H| |F
                                                 |        | | | |O|M|o
                                                 |        | |S| |U|U|o
                                                 |        | |H| |L|S|t
                                                 |        |M|O| |D|T|n
                                                 |        |U|U|M| | |o
                                                 |        |S|L|A|N|N|t
                                                 |        |T|D|Y|O|O|t
FEATURE                                          |SECTION | | | |T|T|e
-------------------------------------------------|--------|-|-|-|-|-|--
                                                 |        | | | | | |
Push flag                                        |        | | | | | |
  Aggregate or queue un-pushed data              |4.2.2.2 | | |x| | |
  Sender collapse successive PSH flags           |4.2.2.2 | |x| | | |
  SEND call can specify PUSH                     |4.2.2.2 | | |x| | |
    If cannot: sender buffer indefinitely        |4.2.2.2 | | | | |x|
    If cannot: PSH last segment                  |4.2.2.2 |x| | | | |
  Notify receiving ALP of PSH                    |4.2.2.2 | | |x| | |1
  Send max size segment when possible            |4.2.2.2 | |x| | | |
                                                 |        | | | | | |
Window                                           |        | | | | | |
  Treat as unsigned number                       |4.2.2.3 |x| | | | |
  Handle as 32-bit number                        |4.2.2.3 | |x| | | |
  Shrink window from right                       |4.2.2.16| | | |x| |
  Robust against shrinking window                |4.2.2.16|x| | | | |
  Receiver's window closed indefinitely          |4.2.2.17| | |x| | |
  Sender probe zero window                       |4.2.2.17|x| | | | |
    First probe after RTO                        |4.2.2.17| |x| | | |
    Exponential backoff                          |4.2.2.17| |x| | | |
  Allow window stay zero indefinitely            |4.2.2.17|x| | | | |
  Sender timeout OK conn with zero wind          |4.2.2.17| | | | |x|
                                                 |        | | | | | |
Urgent Data                                      |        | | | | | |
  Pointer points to last octet                   |4.2.2.4 |x| | | | |
  Arbitrary length urgent data sequence          |4.2.2.4 |x| | | | |
  Inform ALP asynchronously of urgent data       |4.2.2.4 |x| | | | |1
  ALP can learn if/how much urgent data Q'd      |4.2.2.4 |x| | | | |1
                                                 |        | | | | | |
TCP Options                                      |        | | | | | |
  Receive TCP option in any segment              |4.2.2.5 |x| | | | |
  Ignore unsupported options                     |4.2.2.5 |x| | | | |
  Cope with illegal option length                |4.2.2.5 |x| | | | |
  Implement sending & receiving MSS option       |4.2.2.6 |x| | | | |
  Send MSS option unless 536                     |4.2.2.6 | |x| | | |
  Send MSS option always                         |4.2.2.6 | | |x| | |
  Send-MSS default is 536                        |4.2.2.6 |x| | | | |
  Calculate effective send seg size              |4.2.2.6 |x| | | | |
                                                 |        | | | | | |
TCP Checksums                                    |        | | | | | |
  Sender compute checksum                        |4.2.2.7 |x| | | | |
  Receiver check checksum                        |4.2.2.7 |x| | | | |
                                                 |        | | | | | |
Use clock-driven ISN selection                   |4.2.2.9 |x| | | | |
                                                 |        | | | | | |
Opening Connections                              |        | | | | | |
  Support simultaneous open attempts             |4.2.2.10|x| | | | |
  SYN-RCVD remembers last state                  |4.2.2.11|x| | | | |
  Passive Open call interfere with others        |4.2.2.18| | | | |x|
  Function: simultan. LISTENs for same port      |4.2.2.18|x| | | | |
  Ask IP for src address for SYN if necc.        |4.2.3.7 |x| | | | |
    Otherwise, use local addr of conn.           |4.2.3.7 |x| | | | |
  OPEN to broadcast/multicast IP Address         |4.2.3.14| | | | |x|
  Silently discard seg to bcast/mcast addr       |4.2.3.14|x| | | | |
                                                 |        | | | | | |
Closing Connections                              |        | | | | | |
  RST can contain data                           |4.2.2.12| |x| | | |
  Inform application of aborted conn             |4.2.2.13|x| | | | |
  Half-duplex close connections                  |4.2.2.13| | |x| | |
    Send RST to indicate data lost               |4.2.2.13| |x| | | |
  In TIME-WAIT state for 2xMSL seconds           |4.2.2.13|x| | | | |
    Accept SYN from TIME-WAIT state              |4.2.2.13| | |x| | |
                                                 |        | | | | | |
Retransmissions                                  |        | | | | | |
  Jacobson Slow Start algorithm                  |4.2.2.15|x| | | | |
  Jacobson Congestion-Avoidance algorithm        |4.2.2.15|x| | | | |
  Retransmit with same IP ident                  |4.2.2.15| | |x| | |
  Karn's algorithm                               |4.2.3.1 |x| | | | |
  Jacobson's RTO estimation alg.                 |4.2.3.1 |x| | | | |
  Exponential backoff                            |4.2.3.1 |x| | | | |
  SYN RTO calc same as data                      |4.2.3.1 | |x| | | |
  Recommended initial values and bounds          |4.2.3.1 | |x| | | |
                                                 |        | | | | | |
Generating ACK's:                                |        | | | | | |
  Queue out-of-order segments                    |4.2.2.20| |x| | | |
  Process all Q'd before send ACK                |4.2.2.20|x| | | | |
  Send ACK for out-of-order segment              |4.2.2.21| | |x| | |
  Delayed ACK's                                  |4.2.3.2 | |x| | | |
    Delay < 0.5 seconds                          |4.2.3.2 |x| | | | |
    Every 2nd full-sized segment ACK'd           |4.2.3.2 |x| | | | |
  Receiver SWS-Avoidance Algorithm               |4.2.3.3 |x| | | | |
                                                 |        | | | | | |
Sending data                                     |        | | | | | |
  Configurable TTL                               |4.2.2.19|x| | | | |
  Sender SWS-Avoidance Algorithm                 |4.2.3.4 |x| | | | |
  Nagle algorithm                                |4.2.3.4 | |x| | | |
    Application can disable Nagle algorithm      |4.2.3.4 |x| | | | |
                                                 |        | | | | | |
Connection Failures:                             |        | | | | | |
  Negative advice to IP on R1 retxs              |4.2.3.5 |x| | | | |
  Close connection on R2 retxs                   |4.2.3.5 |x| | | | |
  ALP can set R2                                 |4.2.3.5 |x| | | | |1
  Inform ALP of  R1<=retxs<R2                    |4.2.3.5 | |x| | | |1
  Recommended values for R1, R2                  |4.2.3.5 | |x| | | |
  Same mechanism for SYNs                        |4.2.3.5 |x| | | | |
    R2 at least 3 minutes for SYN                |4.2.3.5 |x| | | | |
                                                 |        | | | | | |
Send Keep-alive Packets:                         |4.2.3.6 | | |x| | |
  - Application can request                      |4.2.3.6 |x| | | | |
  - Default is "off"                             |4.2.3.6 |x| | | | |
  - Only send if idle for interval               |4.2.3.6 |x| | | | |
  - Interval configurable                        |4.2.3.6 |x| | | | |
  - Default at least 2 hrs.                      |4.2.3.6 |x| | | | |
  - Tolerant of lost ACK's                       |4.2.3.6 |x| | | | |
                                                 |        | | | | | |
IP Options                                       |        | | | | | |
  Ignore options TCP doesn't understand          |4.2.3.8 |x| | | | |
  Time Stamp support                             |4.2.3.8 | | |x| | |
  Record Route support                           |4.2.3.8 | | |x| | |
  Source Route:                                  |        | | | | | |
    ALP can specify                              |4.2.3.8 |x| | | | |1
      Overrides src rt in datagram               |4.2.3.8 |x| | | | |
    Build return route from src rt               |4.2.3.8 |x| | | | |
    Later src route overrides                    |4.2.3.8 | |x| | | |
                                                 |        | | | | | |
Receiving ICMP Messages from IP                  |4.2.3.9 |x| | | | |
  Dest. Unreach (0,1,5) => inform ALP            |4.2.3.9 | |x| | | |
  Dest. Unreach (0,1,5) => abort conn            |4.2.3.9 | | | | |x|
  Dest. Unreach (2-4) => abort conn              |4.2.3.9 | |x| | | |
  Source Quench => slow start                    |4.2.3.9 | |x| | | |
  Time Exceeded => tell ALP, don't abort         |4.2.3.9 | |x| | | |
  Param Problem => tell ALP, don't abort         |4.2.3.9 | |x| | | |
                                                 |        | | | | | |
Address Validation                               |        | | | | | |
  Reject OPEN call to invalid IP address         |4.2.3.10|x| | | | |
  Reject SYN from invalid IP address             |4.2.3.10|x| | | | |
  Silently discard SYN to bcast/mcast addr       |4.2.3.10|x| | | | |
                                                 |        | | | | | |
TCP/ALP Interface Services                       |        | | | | | |
  Error Report mechanism                         |4.2.4.1 |x| | | | |
  ALP can disable Error Report Routine           |4.2.4.1 | |x| | | |
  ALP can specify TOS for sending                |4.2.4.2 |x| | | | |
    Passed unchanged to IP                       |4.2.4.2 | |x| | | |
  ALP can change TOS during connection           |4.2.4.2 | |x| | | |
  Pass received TOS up to ALP                    |4.2.4.2 | | |x| | |
  FLUSH call                                     |4.2.4.3 | | |x| | |
  Optional local IP addr parm. in OPEN           |4.2.4.4 |x| | | | |
-------------------------------------------------|--------|-|-|-|-|-|--
-------------------------------------------------|--------|-|-|-|-|-|--

FOOTNOTES:

(1)  "ALP" means Application-Layer program.


Next: 5. REFERENCES

Connected: An Internet Encyclopedia
4.2.5 TCP REQUIREMENT SUMMARY

Cotse.Net

Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

 
.
www.cotse.com
Have you gone to church today?
.
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 Cotse.com.
Cotse.com is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609