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e accelerator not delivered to the receiver debugging edit a packet sniffer which taps tcp traffic on a network link can be useful in debugging networks network stacks and applications that use tcp by showing an engineer what packets are passing through a link some networking stacks support the so_debug socket option which can be enabled on the socket using setsockopt that option dumps all the packets tcp states and events on that socket which is helpful in debugging netstat is another utility that can be used for debugging alternatives edit for many applications tcp is not appropriate the application cannot normally access the packets coming after a lost packet until the retransmitted copy of the lost packet is received this causes problems for real time applications such as streaming media real time multiplayer games and voice over ip voip where it is generally more useful to get most of the data in a timely fashion than it is to get all of the data in order for historical and performance reasons most storage area networks sans use fibre channel protocol fcp over fibre channel connections for embedded systems network booting and servers that serve simple requests from huge numbers of clients e g dns servers the complexity of tcp can be a problem tricks such as transmitting data between two hosts that are both behind nat using stun or similar systems are far simpler without a relatively complex protocol like tcp in the way generally where tcp is unsuitable the user datagram protocol udp is used this provides the same application multiplexing and checksums that tcp does but does not handle streams or retransmission giving the application developer the ability to code them in a way suitable for the situation or to replace them with other methods such as forward error correction or error concealment stream control transmission protocol sctp is another protocol that provides reliable stream oriented services similar to tcp it is newer and considerably more complex than tcp and has not yet seen widespread deployment however it is especially designed to be used in situations where reliability and near real time considerations are important venturi transport protocol vtp is a patented proprietary protocol that is designed to replace tcp transparently to overcome perceived inefficiencies related to wireless data transport especially in mobile communications and wireless networks data transmission may become unstable due to high latency and signal interference the tcp congestion avoidance algorithm works very well for ad hoc environments where the data sender is not known in advance if the environment is predictable a timing based protocol such as asynchronous transfer mode atm can avoid tcp s retransmission overhead udp based data transfer protocol udt is designed for high bandwidth high latency network environments particularly for large scale data transfers such as file or media streaming in networks with a high bandwidth delay product 138 udt offers advantages over tcp providing better efficiency and fairness multipurpose transaction protocol mtp ip is patented proprietary software that is designed to adaptively achieve high throughput and transaction performance in a wide variety of network conditions particularly those where tcp is perceived to be inefficient checksum computation edit further information internet checksum tcp checksum for ipv4 edit when tcp runs over ipv4 the method used to compute the checksum is defined as follows 30 the checksum field is the 16 bit ones complement of the ones complement sum of all 16 bit words in the header and text the checksum computation needs to ensure the 16 bit alignment of the data being summed if a segment contains an odd number of header and text octets alignment can be achieved by padding the last octet with zeros on its right to form a 16 bit word for checksum purposes the pad is not transmitted as part of the segment while computing the checksum the checksum field itself is replaced with zeros in other words after appropriate padding all 16 bit words are added using ones complement arithmetic the sum is then bitwise complemented and inserted as the checksum field a pseudo header that mimics the ipv4 packet header used in the checksum computation is as follows tcp pseudo header for checksum computation ipv4 offset octet 0 1 2 3 octet bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0 0 source address 4 32 destination address 8 64 zeroes protocol 6 tcp length 12 96 source port destination port 16 128 sequence number 20 160 acknowledgement number 24 192 data offset reserved flags window 28 224 checksum urgent pointer 32 256 options 36 288 data 40 320 the checksum is computed over the following fields source address 32 bits the source address in the ipv4 header destination address 32 bits the destination address in the ipv4 header zeroes 8 bits all zeroes protocol 8 bits the protocol value for tcp 6 tcp length 16 bits the length of the tcp header and data measured in octets for example let s say we have ipv4 packet with total length of 200 bytes and ihl value of 5 which indicates a length of 5 bits 32 bits 160 bits 20 bytes we can compute the tcp length as total length ipv4 header length i e 200 20 which results in 180 bytes tcp checksum for ipv6 edit when tcp runs over ipv6 the method used to compute the checksum is changed 139 any transport or other upper layer protocol that includes the addresses from the ip header in its checksum computation must be modified for use over ipv6 to include the 128 bit ipv6 addresses instead of 32 bit ipv4 addresses a pseudo header that mimics the ipv6 header for computation of the checksum is shown below tcp pseudo header for checksum computation ipv6 offset octet 0 1 2 3 octet bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0 0 source address 4 32 8 64 12 96 16 128 destination address 20 160 24 192 28 224 32 256 tcp length 36 288 zeroes next header 6 40 320 source port destination port 44 352 sequence number 48 384 acknowledgement number 52 416 data offset reserved flags window 56 448 checksum urgent pointer 60 480 options 64 512 data 68 544 the checksum is computed over the following fields source address 128 bits the address in the ipv6 header destination address 128 bits the final destination if the ipv6 packet doesn t contain a routing header tcp uses the destination address in the ipv6 header otherwise at the originating node it uses the address in the last element of the routing header and at the receiving node it uses the destination address in the ipv6 header tcp length 32 bits the length of the tcp header and data measured in octets zeroes 24 bits zeroes 0 all zeroes next header 8 bits the protocol value for tcp 6 checksum offload edit many tcp ip software stack implementations provide options to use hardware assistance to automatically compute the checksum in the network adapter prior to transmission onto the network or upon reception from the network for validation this may reduce cpu load associated with calculating the checksum potentially increasing overall network performance this feature may cause packet analyzers that are unaware or uncertain about the use of checksum offload to report invalid checksums in outbound packets that have not yet reached the network adapter 140 this will only occur for packets that are intercepted before being transmitted by the network adapter all packets transmitted by the network adaptor on the wire will have valid checksums 141 this issue can also occur when monitoring packets being transmitted between virtual machines on the same host where a virtual device driver may omit the checksum calculation as an optimization knowing that the checksum will be calculated later by the vm host kernel or its physical hardware see also edit micro bursting networking tcp global synchronization tcp fusion tcp pacing tcp stealth transport layer comparison of transport layer protocols wtcp a proxy based modification of tcp for wireless networks notes edit 1 2 added to header by rfc 3168 windows size units are by default bytes window size is relative to the segment identified by the sequence number in the acknowledgment field equivalently a pair of network sockets for the source and destination each of which is made up of an address and a port as of the latest standard http 3 quic is used as a transport instead of tcp references edit comer d e 2021 internetworking with tcp ip 6th ed pearson labrador miguel a perez alfredo j wightman pedro m 2010 location based information systems developing real time tracking applications crc press isbn 978 1 000 55680 3 vinton g cerf robert e kahn may 1974 a protocol for packet network intercommunication pdf ieee transactions on communications 22 5 637 648 bibcode 1974itcom 22 637c doi 10 1109 tcom 1974 1092259 archived from the original pdf on march 4 2016 bennett richard september 2009 designed for change end to end arguments internet innovation and the net neutrality debate pdf information technology and innovation foundation p 11 archived pdf from the original on 29 august 2019 retrieved 11 september 2017 rfc 675 russell andrew lawrence 2008 industrial legislatures consensus standardization in the second and third industrial revolutions thesis see abbate inventing the internet 129 30 vinton g cerf october 1980 protocols for interconnected packet networks acm sigcomm computer communication review 10 4 10 11 and rfc 760 ietf doi 10 17487 rfc0760 postel jon 15 august 1977 comments on internet protocol and tcp ien 2 archived from the original on may 16 2019 retrieved june 11 2016 we are screwing up in our design of internet protocols by violating the principle of layering specifically we are trying to use tcp to do two things serve as a host level end to end protocol and to serve as an internet packaging and routing protocol these two things should be provided in a layered and modular way cerf vinton g 1 april 1980 final report of the stanford university tcp project cerf vinton g cain edward october 1983 the dod internet architecture model computer networks 7 5 307 318 doi 10 1016 0376 5075 83 90042 9 the tcp ip guide tcp ip architecture and the tcp ip model www tcpipguide com retrieved 2020 02 11 eddy wesley august 2022 transmission control protocol tcp ietf doi 10 17487 rfc9293 rfc 9293 internet experiment note index www rfc editor org retrieved 2024 01 21 westine a smallberg d postel j february 1983 summary of smallberg surveys ietf doi 10 17487 rfc9293 rfc 9293 robert e kahn a m turing award laureate amturing acm org archived from the original on 2019 07 13 retrieved 2019 07 13 vinton cerf a m turing award laureate amturing acm org archived from the original on 2021 10 11 retrieved 2019 07 13 1 2 3 4 5 6 7 8 9 comer douglas e 2006 internetworking with tcp ip principles protocols and architecture vol 1 5th ed prentice hall isbn 978 0 13 187671 2 1 2 3 rfc 9293 2 2 key tcp concepts rfc 791 pp 5 6 rfc 793 2 2 model of operation 1 2 3 4 rfc 9293 3 1 header format rfc 9293 3 8 5 the communication of urgent information rfc 9293 3 4 sequence numbers rfc 9293 3 4 1 initial sequence number selection change rfc 3540 robust explicit congestion notification ecn signaling with nonces to historic datatracker ietf org retrieved 2023 04 18 briscoe bob kühlewind mirja scheffenegger richard 10 march 2025 more accurate explicit congestion notification accecn feedback in tcp ietf i d draft ietf tcpm accurate ecn retrieved 2025 10 24 rfc 3168 pp 13 14 rfc 3168 p 15 rfc 3168 pp 18 19 rfc 793 1 2 3 rfc 9293 1 2 3 rfc 7323 rfc 2018 2 sack permitted option rfc 2018 3 sack option format heffernan andy august 1998 protection of bgp sessions via the tcp md5 signature option ietf doi 10 17487 rfc2385 rfc 2385 retrieved 2023 12 30 transmission control protocol tcp parameters tcp option kind numbers iana archived from the original on 2017 10 02 retrieved 2017 10 19 rfc 9293 3 3 2 state machine overview kurose james f 2017 computer networking a top down approach keith w ross 7th ed harlow england p 286 isbn 978 0 13 359414 0 oclc 936004518 cite book cs1 maint location missing publisher link tanenbaum andrew s 2003 03 17 computer networks fourth ed prentice hall isbn 978 0 13 066102 9 linux net ipv4 tcp_minisocks c at master torvalds linux github retrieved 2025 04 24 rfc 1122 4 2 2 13 closing a connection tcp transmission control protocol the transmission protocol explained ionos digital guide 2020 03 02 retrieved 2025 04 24 the tcp ip guide tcp connection termination www tcpipguide com retrieved 2025 04 24 karn partridge 1991 p 364 rfc 9002 4 2 monotonically increasing packet numbers mathis mathew semke mahdavi ott 1997 the macroscopic behavior of the tcp congestion avoidance algorithm acm sigcomm computer communication review 27 3 67 82 doi 10 1145 263932 264023 s2cid 1894993 rfc 3522 p 4 leung ka cheong li victor o k yang daiqin 2007 an overview of packet reordering in transmission control protocol tcp problems solutions and challenges ieee transactions on parallel and distributed systems 18 4 522 535 bibcode 2007itpds 18 522l doi 10 1109 tpds 2007 1011 johannessen mads 2015 investigate reordering in linux tcp msc thesis university of oslo cheng yuchung 2015 rack a time based fast loss detection for tcp draft cheng tcpm rack 00 pdf ietf94 yokohama ietf rfc 8985 cheng yuchung cardwell neal dukkipati nandita jha priyaranjan 2017 rack a time based fast loss recovery draft ietf tcpm rack 02 pdf ietf100 yokohama ietf rfc 6298 p 2 1 2 zhang 1986 p 399 karn partridge 1991 p 365 ludwig katz 2000 pp 31 33 gurtov ludwig 2003 p 2 gurtov floyd 2004 p 1 1 2 rfc 6298 p 4 karn partridge 1991 pp 370 372 allman paxson 1999 p 268 rfc 7323 p 7 stone partridge 2000 when the crc and tcp checksum disagree proceedings of the conference on applications technologies architectures and protocols for computer communication acm sigcomm computer communication review pp 309 319 doi 10 1145 347059 347561 isbn 978 1 58113 223 6 s2cid 9547018 archived from the original on 2008 05 05 retrieved 2008 04 28 cite conference cs1 maint miscellaneous url link rfc 5681 rfc 6298 rfc 1122 rfc 2018 p 10 rfc 9002 4 4 no reneging corbet jonathan 7 july 2004 tcp window scaling and broken routers lwn net archived from the original on 2020 03 31 retrieved 2016 07 21 rfc 3522 ip sysctl linux kernel documentation archived from the original on 5 march 2016 retrieved 15 december 2018 wang eve tcp timestamp is disabled technet windows server 2012 essentials microsoft archived from the original on 2018 12 15 retrieved 2018 12 15 david murray terry koziniec sebastian zander michael dixon polychronis koutsakis 2017 an analysis of changing enterprise network traffic characteristics pdf the 23rd asia pacific conference on communications apcc 2017 archived pdf from the original on 3 october 2017 retrieved 3 october 2017 gont fernando november 2008 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