Is collision possible in a star topology switch link layer ?
up vote
1
down vote
favorite
I am learning about collision detection in ethernet protocols. Since each host has its own channel to forward to the switch, is it possible for collision to happen if the switch receives two frames at the same time ?
networking ethernet switch
asked Nov 23 at 13:13
calveeen
486
add a comment |
up vote
1
down vote
favorite
I am learning about collision detection in ethernet protocols. Since each host has its own channel to forward to the switch, is it possible for collision to happen if the switch receives two frames at the same time ?
networking ethernet switch
asked Nov 23 at 13:13
calveeen
486
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I am learning about collision detection in ethernet protocols. Since each host has its own channel to forward to the switch, is it possible for collision to happen if the switch receives two frames at the same time ?
networking ethernet switch
asked Nov 23 at 13:13
calveeen
486
I am learning about collision detection in ethernet protocols. Since each host has its own channel to forward to the switch, is it possible for collision to happen if the switch receives two frames at the same time ?
networking ethernet switch
networking ethernet switch
asked Nov 23 at 13:13
calveeen
486
asked Nov 23 at 13:13
calveeen
486
asked Nov 23 at 13:13
calveeen
486
asked Nov 23 at 13:13
calveeen
486
asked Nov 23 at 13:13
calveeen
486
486
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
If we are talking about a switch, it isn't a shared medium where collision can occur.
The switch switches connections to let packets through. A packet comes in from Port 1 and wants to go to port 2. A second packet comes in on port 3 and wants to go to port 2 as well. The switch first connects Ports 1&2 letting the packet through disconnects and then connects ports 2&3 letting the 2nd packet go through.
This was an overly simplified example.
edited Nov 23 at 13:39
harrymc
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
If we are talking about a switch, it isn't a shared medium where collision can occur.
The switch switches connections to let packets through. A packet comes in from Port 1 and wants to go to port 2. A second packet comes in on port 3 and wants to go to port 2 as well. The switch first connects Ports 1&2 letting the packet through disconnects and then connects ports 2&3 letting the 2nd packet go through.
This was an overly simplified example.
edited Nov 23 at 13:39
harrymc
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
add a comment |
up vote
2
down vote
accepted
If we are talking about a switch, it isn't a shared medium where collision can occur.
The switch switches connections to let packets through. A packet comes in from Port 1 and wants to go to port 2. A second packet comes in on port 3 and wants to go to port 2 as well. The switch first connects Ports 1&2 letting the packet through disconnects and then connects ports 2&3 letting the 2nd packet go through.
This was an overly simplified example.
edited Nov 23 at 13:39
harrymc
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
If we are talking about a switch, it isn't a shared medium where collision can occur.
The switch switches connections to let packets through. A packet comes in from Port 1 and wants to go to port 2. A second packet comes in on port 3 and wants to go to port 2 as well. The switch first connects Ports 1&2 letting the packet through disconnects and then connects ports 2&3 letting the 2nd packet go through.
This was an overly simplified example.
edited Nov 23 at 13:39
harrymc
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
If we are talking about a switch, it isn't a shared medium where collision can occur.
The switch switches connections to let packets through. A packet comes in from Port 1 and wants to go to port 2. A second packet comes in on port 3 and wants to go to port 2 as well. The switch first connects Ports 1&2 letting the packet through disconnects and then connects ports 2&3 letting the 2nd packet go through.
This was an overly simplified example.
edited Nov 23 at 13:39
harrymc
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
edited Nov 23 at 13:39
harrymc
249k10257549
edited Nov 23 at 13:39
harrymc
249k10257549
edited Nov 23 at 13:39
harrymc
249k10257549
249k10257549
answered Nov 23 at 13:28
Ricardo S.
1329
answered Nov 23 at 13:28
Ricardo S.
1329
answered Nov 23 at 13:28
Ricardo S.
1329
1329
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
add a comment |
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
could you elaborate further on the connecting and disconnecting part ? does that mean that if 2 frames arrive at the switch, both destined for the same port, then the switch will buffer one frame while letting the other frame transmit to that port. And this only applies to frames that are forwarded to the same port ?
– calveeen
Nov 23 at 13:53
1
1
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
That depends on the switch, see etutorials.org/Networking/lan+switching/…
– Tarnay Kálmán
Nov 23 at 14:05
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
@calveen I don't know as much, but to reinforce Tarnay's comment, it does depends on the hardware of the switch.
– Ricardo S.
Nov 23 at 14:08
add a comment |
Thanks for contributing an answer to Super User!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1377801%2fis-collision-possible-in-a-star-topology-switch-link-layer%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
