TOS meaning in Telecommunication ?

Answer: What is Type of Service mean?

The type of service (ToS) field is the second byte of the IPv4 header. It has had various purposes over the years, and has been defined in different ways by five RFCs.

Prior to the redefinition, the ToS field could specify a datagram's priority and request a route for low-latency, high-throughput, or highly-reliable service. Based on these ToS values, a packet would be placed in a prioritized outgoing queue, or take a route with appropriate latency, throughput, or reliability. In practice, the ToS field never saw widespread use outside of US Department of Defense networks. However, a great deal of experimental, research, and deployment work has focused on how to make use of these eight bits, resulting in the current DS field definition.

The modern redefinition of the ToS field, also used for the Traffic Class field in IPv6 packets, is an 8-bit differentiated services field (DS field) which consists of a 6-bit Differentiated Services Code Point (DSCP) field and a 2-bit Explicit Congestion Notification (ECN) field. While Differentiated Services is somewhat backwards compatible with ToS, ECN is not.

reference

Full Form	Category
The Oceanography Society	Academic & Science
The Obesity Society	Academic & Science
TIROS (Television Infra-Red Observation Satellite) Operational System	Academic & Science
Technical and Occupational Sciences	Academic & Science
Tromso	Airport Code
Toshiba Corporation	Business
TSO3 Incorporated	Business
Total Operating Spend	Business
Temporarily Out of Stock	Business
Time Of Sale	Business
Thunder Of Slidell	Business
Thomson Corporation	Business
Teacher Over Shoulder	Community
Tree Of Savior	Community
Star Trek, The Original Series	Community
The Original Series	Community
Time Of Service	Community
Tourism Organisation of Serbia	Community
The Outdoor School	Community
Tales Of Symphonia	Community
Theosophical Order of Service	Community
Top of Stack	Computer Assembly Language
Terminate On Save	Computer Assembly Language
Terminal Operating System	Computing
The Other Service	Computing
Technical and Office Systems	Computing
Temporary Out of Service	Computing
Tiny Operating System	Computing
The Operating System	Computing
Taligent Object Services	Computing
The Other Spammers	Computing
Trusted Operating System	Computing
Tape On Substrate	Computing
Time On Site	Computing
Teraflop Operating System	Computing
Technology and Occupational Sciences	Computing
ThingsOperatingSystem	Cryptocurrency
Atari S T Self-extracting File Archive File	File Type
Towncar Signature	General
Team Omega Squadron	General
Top Of Steel	General
Transactions on Storage	General
The Other Side	General
Tramiel Operating System	General
Terms of	General
Tolga Os Sparebank	General
Tower of Saviors	General
Taken out of Service	General
Tread over Sidewall	General
Top Of the Stack	General
Type Of Shipment	General
Thirty Obscure Schmucks	General
Terminal Operating Systems	General
Texas Ornithological Society	General
Training Objective Statement	General
Tennessee Ornithological Society	General
Top Of Sugarloaf	General
Tip Over Special	General
Tape Operating System	General
Talend Open Studio	General
Tossing Of Salad	General
Tagalog On Site	General
The Old Startrek	General
Transmission Output Speed	General
Turkiye Offroad Sampiyonasi	General
Traffic Officer Service	General
Torque Only Sensor	General
Town Of Southampton	Governmental
TOLASAMPATTI	Indian Railway Station
Tab Out Soon	Internet
Terms of service	Internet Slang
Thoracic Outlet Syndrome	Medical
Tactical Operations System	Military and Defence
Transition Operational State	Military and Defence
Taken Out and Shot	Military and Defence
Time On Station	Military and Defence
Tromso, Norway	Regional
Toasteros (operating System)	Softwares
Test Operating System	Space Science
Transfer Orbit Stage	Space Science
Taken On Strength	Sports
Temporarily Out of Service	Telecommunication
Type of Service	Telecommunication
Testing Operation System	Telecommunication