Mixing
Data link layer acknowledgement
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I'm confused with some concepts please help me out,
- Data link layer manage flow control hop to hop. Flow control requires acknowledgement receiving but If we observe data link layer header, it does not have any ack field.
So does that mean data link layer always depend on transport layer for acknowledgement processing?
- On receiving a packet from any local nodes does router gives acknowledgement in return? If they do then how it is possible as they operate only up to network layer and ack generate in transport layer?
router ethernet osi
asked 4 hours ago
Nick
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up vote
2
down vote
favorite
I'm confused with some concepts please help me out,
- Data link layer manage flow control hop to hop. Flow control requires acknowledgement receiving but If we observe data link layer header, it does not have any ack field.
So does that mean data link layer always depend on transport layer for acknowledgement processing?
- On receiving a packet from any local nodes does router gives acknowledgement in return? If they do then how it is possible as they operate only up to network layer and ack generate in transport layer?
router ethernet osi
asked 4 hours ago
Nick
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I'm confused with some concepts please help me out,
- Data link layer manage flow control hop to hop. Flow control requires acknowledgement receiving but If we observe data link layer header, it does not have any ack field.
So does that mean data link layer always depend on transport layer for acknowledgement processing?
- On receiving a packet from any local nodes does router gives acknowledgement in return? If they do then how it is possible as they operate only up to network layer and ack generate in transport layer?
router ethernet osi
asked 4 hours ago
Nick
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm confused with some concepts please help me out,
- Data link layer manage flow control hop to hop. Flow control requires acknowledgement receiving but If we observe data link layer header, it does not have any ack field.
So does that mean data link layer always depend on transport layer for acknowledgement processing?
- On receiving a packet from any local nodes does router gives acknowledgement in return? If they do then how it is possible as they operate only up to network layer and ack generate in transport layer?
router ethernet osi
router ethernet osi
asked 4 hours ago
Nick
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
Nick
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
Nick
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
Nick
112
asked 4 hours ago
Nick
112
112
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Nick is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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1 Answer
1
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oldest
votes
up vote
3
down vote
The Data link layer in Ethernet (802.3) contains two sublayers :
- Media Access Control (MAC)
- Logical Link Control (LLC)
LLC does not provide flow control. Incorrect packets are detected and discarded, and the retransmissions rely on higher layer protocols.
The idea behind this behaviour is that wired networks have a very low error ratio, so an ACK and retransmission mechanism is unnecesary and make the network slower.
In 802.11 there is flow control and error management.
It isn't in the LLC sublayer. It is part of the CSMA/CA MAC protocol.
In CSMA/CA The receiving node sends an ACK after receiving a packet. If the ACK is not received, the packet is considered lost and the sender tries a retransmission.
Wireless networks have higher error ratios. It is necessary to have it.
answered 3 hours ago
jcbermu
3,878817
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
The Data link layer in Ethernet (802.3) contains two sublayers :
- Media Access Control (MAC)
- Logical Link Control (LLC)
LLC does not provide flow control. Incorrect packets are detected and discarded, and the retransmissions rely on higher layer protocols.
The idea behind this behaviour is that wired networks have a very low error ratio, so an ACK and retransmission mechanism is unnecesary and make the network slower.
In 802.11 there is flow control and error management.
It isn't in the LLC sublayer. It is part of the CSMA/CA MAC protocol.
In CSMA/CA The receiving node sends an ACK after receiving a packet. If the ACK is not received, the packet is considered lost and the sender tries a retransmission.
Wireless networks have higher error ratios. It is necessary to have it.
answered 3 hours ago
jcbermu
3,878817
add a comment |Â
up vote
3
down vote
The Data link layer in Ethernet (802.3) contains two sublayers :
- Media Access Control (MAC)
- Logical Link Control (LLC)
LLC does not provide flow control. Incorrect packets are detected and discarded, and the retransmissions rely on higher layer protocols.
The idea behind this behaviour is that wired networks have a very low error ratio, so an ACK and retransmission mechanism is unnecesary and make the network slower.
In 802.11 there is flow control and error management.
It isn't in the LLC sublayer. It is part of the CSMA/CA MAC protocol.
In CSMA/CA The receiving node sends an ACK after receiving a packet. If the ACK is not received, the packet is considered lost and the sender tries a retransmission.
Wireless networks have higher error ratios. It is necessary to have it.
answered 3 hours ago
jcbermu
3,878817
add a comment |Â
up vote
3
down vote
up vote
3
down vote
The Data link layer in Ethernet (802.3) contains two sublayers :
- Media Access Control (MAC)
- Logical Link Control (LLC)
LLC does not provide flow control. Incorrect packets are detected and discarded, and the retransmissions rely on higher layer protocols.
The idea behind this behaviour is that wired networks have a very low error ratio, so an ACK and retransmission mechanism is unnecesary and make the network slower.
In 802.11 there is flow control and error management.
It isn't in the LLC sublayer. It is part of the CSMA/CA MAC protocol.
In CSMA/CA The receiving node sends an ACK after receiving a packet. If the ACK is not received, the packet is considered lost and the sender tries a retransmission.
Wireless networks have higher error ratios. It is necessary to have it.
answered 3 hours ago
jcbermu
3,878817
The Data link layer in Ethernet (802.3) contains two sublayers :
- Media Access Control (MAC)
- Logical Link Control (LLC)
LLC does not provide flow control. Incorrect packets are detected and discarded, and the retransmissions rely on higher layer protocols.
The idea behind this behaviour is that wired networks have a very low error ratio, so an ACK and retransmission mechanism is unnecesary and make the network slower.
In 802.11 there is flow control and error management.
It isn't in the LLC sublayer. It is part of the CSMA/CA MAC protocol.
In CSMA/CA The receiving node sends an ACK after receiving a packet. If the ACK is not received, the packet is considered lost and the sender tries a retransmission.
Wireless networks have higher error ratios. It is necessary to have it.
answered 3 hours ago
jcbermu
3,878817
answered 3 hours ago
jcbermu
3,878817
answered 3 hours ago
jcbermu
3,878817
answered 3 hours ago
jcbermu
3,878817
3,878817
add a comment |Â
add a comment |Â
Nick is a new contributor. Be nice, and check out our Code of Conduct.
Nick is a new contributor. Be nice, and check out our Code of Conduct.
Nick is a new contributor. Be nice, and check out our Code of Conduct.
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