How are protocols used encoded in the data send over them?
I was reading answers to this this SO question explaining how the firewall will take certain actions dependent on the protocol data was sent over (such as FTP vs HTTP, etc.). In addition, the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X.
1) Is there a standard for encoding what protocol data was sent over in the data itself?
2) Are the protocols for all layers (1-7 in the OSI model) encoded in the message, or just certain layers such as transport layer and application layer?
http networking tcp network-protocols application-layer
edited Feb 7 at 23:19
user207421
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
add a comment |
I was reading answers to this this SO question explaining how the firewall will take certain actions dependent on the protocol data was sent over (such as FTP vs HTTP, etc.). In addition, the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X.
1) Is there a standard for encoding what protocol data was sent over in the data itself?
2) Are the protocols for all layers (1-7 in the OSI model) encoded in the message, or just certain layers such as transport layer and application layer?
http networking tcp network-protocols application-layer
edited Feb 7 at 23:19
user207421
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31
add a comment |
I was reading answers to this this SO question explaining how the firewall will take certain actions dependent on the protocol data was sent over (such as FTP vs HTTP, etc.). In addition, the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X.
1) Is there a standard for encoding what protocol data was sent over in the data itself?
2) Are the protocols for all layers (1-7 in the OSI model) encoded in the message, or just certain layers such as transport layer and application layer?
http networking tcp network-protocols application-layer
edited Feb 7 at 23:19
user207421
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
I was reading answers to this this SO question explaining how the firewall will take certain actions dependent on the protocol data was sent over (such as FTP vs HTTP, etc.). In addition, the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X.
1) Is there a standard for encoding what protocol data was sent over in the data itself?
2) Are the protocols for all layers (1-7 in the OSI model) encoded in the message, or just certain layers such as transport layer and application layer?
http networking tcp network-protocols application-layer
http networking tcp network-protocols application-layer
edited Feb 7 at 23:19
user207421
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
edited Feb 7 at 23:19
user207421
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
edited Feb 7 at 23:19
user207421
264k25215363
edited Feb 7 at 23:19
user207421
264k25215363
edited Feb 7 at 23:19
user207421
264k25215363
264k25215363
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
asked Nov 15 '18 at 2:40
TheeNinjaDevTheeNinjaDev
2501314
2501314
(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31
add a comment |
(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31
(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31
add a comment |
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(1) No; (2) no; (3) the OSI model does not apply to TCP/IP; (4) off topic.
– user207421
Nov 15 '18 at 3:21
@user207421 If there is no standard, how can the protocol that the client uses be determined?
– TheeNinjaDev
Nov 15 '18 at 3:39
The protocol is associated with the port number.
– user207421
Jan 31 at 1:12
"the router will have the data rerouted differently dependent on whether it is UDP port X or TCP port X." Routers route packets based on the destination layer-3 address and its match in the routing table, not on the transport protocol address, which is not in the routing table.
– Ron Maupin
Feb 7 at 23:31