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service
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... reliability, flow control, sequencing, or other services commonly
found in host-to-host protocols. The internet protocol ...
... host-to-host protocols. The internet protocol can capitalize
on the services of its supporting networks to provide various types
and qualities of service ...
... The internet protocol uses four key mechanisms in providing its
service: Type of Service, Time to Live, Options, and Header Checksum ...
... internet protocol uses four key mechanisms in providing its
service: Type of Service, Time to Live, Options, and Header Checksum.
...
...
The Type of Service is used to indicate the quality of the service
desired. The type of service ...
...
The Type of Service is used to indicate the quality of the service
desired. The type of service is an abstract or generalized set of
...
... Type of Service is used to indicate the quality of the service
desired. The type of service is an abstract or generalized set of
parameters which characterize the service choices provided in the
...
... desired. The type of service is an abstract or generalized set of
parameters which characterize the service choices provided in the
networks that make up the internet ...
... networks that make up the internet. This type of service indication
is to be used by gateways to select the actual transmission parameters
...
... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| IHL |Type of Service| Total Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification |Flags| Fragment ...
... 8 bits
The Type of Service provides an indication of the abstract
parameters of the quality of service desired. These parameters are
...
... The Type of Service provides an indication of the abstract
parameters of the quality of service desired. These parameters are
to be used to guide the selection of the actual service parameters
...
... parameters of the quality of service desired. These parameters are
to be used to guide the selection of the actual service parameters
when transmitting a datagram ...
... network. Several
networks offer service precedence, which somehow treats high
precedence traffic as more important than other traffic ...
... Throughput, and Reliability indications may
increase the cost (in some sense) of the service. In many networks
better performance ...
... of these three indications should be set.
The type of service is used to specify the treatment of the datagram
during its transmission through the internet ...
... internet system. Example
mappings of the internet type of service to the actual service
provided on networks ...
... mappings of the internet type of service to the actual service
provided on networks such as AUTODIN II, ARPANET ...
...
Type of Service
...
... The type of service (TOS) is for internet service quality selection.
The type of service is specified along the abstract parameters
...
... TOS) is for internet service quality selection.
The type of service is specified along the abstract parameters
precedence, delay, throughput, and reliability ...
... throughput, and reliability. These abstract
parameters are to be mapped into the actual service parameters of
the particular networks the datagram ...
... "standard" messages (type 0) and "uncontrolled" messages (type 3),
(the choice between single packet and multipacket messages can also
be considered a service parameter). The uncontrolled messages tend
to be less reliably delivered and suffer less delay. Suppose an
internet ...
... reliability requirements
are indicated and delay is not. More details are given on service
mappings in "Service Mappings" [8 ...
... are indicated and delay is not. More details are given on service
mappings in "Service Mappings" [8].
...
... interfaces. However, all IPs
must provide a certain minimum set of services to guarantee that all
IP implementations can support the same protocol hierarchy. This
...
... high
level languages, but this usage is not meant to rule out trap type
service calls (e.g., SVCs, UUOs, EMTs), or any other form of
interprocess communication.
...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Ver= 4 |IHL= 5 |Type of Service| Total Length = 21 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification = 111 |Flg=0| Fragment ...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Ver= 4 |IHL= 5 |Type of Service| Total Length = 472 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification = 111 |Flg=0| Fragment ...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Ver= 4 |IHL= 5 |Type of Service| Total Length = 276 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification = 111 |Flg=1| Fragment ...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Ver= 4 |IHL= 5 |Type of Service| Total Length = 216 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification = 111 |Flg=0| Fragment ...
... 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Ver= 4 |IHL= 8 |Type of Service| Total Length = 576 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification = 111 |Flg=0| Fragment ...
... Type of Service ...
... Type of Service ...
... internet header field which indicates the type (or quality)
of service for this internet datagram. ...
... Postel, J., "Service Mappings," RFC 795, USC/Information Sciences Institute, September 1981. ...