User Datagram Protocol (UDP) Transmission Control Protocol (TCP
... " Multiple packets lost in a window " Sender out of Fast Recovery after retransmission of only one packet $# cwnd closed up # no room in cwnd to generate duplicate ACKs for additional Fast Retransmits # eventual timeout ! New Reno continues Fast Recovery until all lost packets from that window ar ...
... " Multiple packets lost in a window " Sender out of Fast Recovery after retransmission of only one packet $# cwnd closed up # no room in cwnd to generate duplicate ACKs for additional Fast Retransmits # eventual timeout ! New Reno continues Fast Recovery until all lost packets from that window ar ...
Chapter 13
... – New data is placed in the buffer, but the sender does not send until a maximum size segment is filled – If still waiting to send when an ACK arrives, send all data that has accumulated in the buffer – Apply the rule even if the user has requested a push – This is called the Nagle algorithm and req ...
... – New data is placed in the buffer, but the sender does not send until a maximum size segment is filled – If still waiting to send when an ACK arrives, send all data that has accumulated in the buffer – Apply the rule even if the user has requested a push – This is called the Nagle algorithm and req ...
Protcols for Highly-Dynamic Airborne Networks
... for reliable mode • FEC used for quasi-reliable mode ...
... for reliable mode • FEC used for quasi-reliable mode ...
TCP - WordPress.com
... – Increase window size so that sender is transmitting packets as fast as the network can carry them – Eliminates network idle time – Increases throughput (as compared to the simple positive acknowledgment protocol) ...
... – Increase window size so that sender is transmitting packets as fast as the network can carry them – Eliminates network idle time – Increases throughput (as compared to the simple positive acknowledgment protocol) ...
A Brief history of the Internet BY ZIYUN WANG
... • In 1973, the first written version of TCP/IP was distributed. • A key concept of the Internet is that it was not designed for just one application, but as a general infrastructure on which new applications could be conceived, as illustrated later by the emergence of the World Wide Web. ...
... • In 1973, the first written version of TCP/IP was distributed. • A key concept of the Internet is that it was not designed for just one application, but as a general infrastructure on which new applications could be conceived, as illustrated later by the emergence of the World Wide Web. ...
TcpIp and Firewalls
... are potentially smaller than the original transmission. • Some of the frames can be lost • If a message is fragmented and frames are lost, all frames up to the first lost frame are passed up to the receiving TCP and all subsequent frames are dropped. • TCP views this as a stream and is unaware of th ...
... are potentially smaller than the original transmission. • Some of the frames can be lost • If a message is fragmented and frames are lost, all frames up to the first lost frame are passed up to the receiving TCP and all subsequent frames are dropped. • TCP views this as a stream and is unaware of th ...
CMPT 880: Internet Architectures and Protocols
... TCP Throughput Analysis Any TCP model must capture Window Dynamics (internal and deterministic) • Controlled internally by the TCP algorithms. • Depends on the particular flavor of TCP • We assume TCP Reno (the most common) Packet Loss Process (external and uncertain) • Models the aggregate o ...
... TCP Throughput Analysis Any TCP model must capture Window Dynamics (internal and deterministic) • Controlled internally by the TCP algorithms. • Depends on the particular flavor of TCP • We assume TCP Reno (the most common) Packet Loss Process (external and uncertain) • Models the aggregate o ...
How Fast Is the Internet - Faculty of Computer Science
... Value may be set by application Default determined by operating system ...
... Value may be set by application Default determined by operating system ...
pptx
... Reduce slot != Map slot due to differing # of flows Adapt allocation as needed: Boost task that is holding back job due to congestion ...
... Reduce slot != Map slot due to differing # of flows Adapt allocation as needed: Boost task that is holding back job due to congestion ...
TCP_IP_Continued
... TCP allows programs running on different computers to connect and reliably communicate directly with each other over a shared network Communication is accomplished via information segments TCP Utilizes port numbers to disambiguate between the possibly (probably) numerous applications running on the ...
... TCP allows programs running on different computers to connect and reliably communicate directly with each other over a shared network Communication is accomplished via information segments TCP Utilizes port numbers to disambiguate between the possibly (probably) numerous applications running on the ...
Chapter 6
... – TCP Tahoe + Fast Recovery – Observation: packet loss can be inferred not only by timeouts, but also by duplicate ACKs – Widely deployed on most UNIX systems, though SACK-TCP is now gaining prominence Prof. Rick Han, University of Colorado at Boulder ...
... – TCP Tahoe + Fast Recovery – Observation: packet loss can be inferred not only by timeouts, but also by duplicate ACKs – Widely deployed on most UNIX systems, though SACK-TCP is now gaining prominence Prof. Rick Han, University of Colorado at Boulder ...
answers - Princeton CS
... The above figure shows an Internet topology with three Autonomous Systems (AS). The LAN on the left includes a host H1. The LAN on the right uses a NAT and includes a host H2. Packets between the two endpoints are routed along the path shown, which includes an IPv4 tunnel. The various network interf ...
... The above figure shows an Internet topology with three Autonomous Systems (AS). The LAN on the left includes a host H1. The LAN on the right uses a NAT and includes a host H2. Packets between the two endpoints are routed along the path shown, which includes an IPv4 tunnel. The various network interf ...
Network Performance Troubleshooting
... (2) Kernel hands the data to the IP stack to encapsulate it in a PDU (3) Kernel puts the PDU on a transmit queue for the device in question (4) Device driver picks PDUs from the queue and copies them to the NIC (5) NIC sends the PDU over the wire (6) NIC notifies the kernel about the transmissio ...
... (2) Kernel hands the data to the IP stack to encapsulate it in a PDU (3) Kernel puts the PDU on a transmit queue for the device in question (4) Device driver picks PDUs from the queue and copies them to the NIC (5) NIC sends the PDU over the wire (6) NIC notifies the kernel about the transmissio ...
ECE544 - WINLAB
... • (CongestionWindow increase by one packet or MSS after all packets sent out during last RTT have been acked) ...
... • (CongestionWindow increase by one packet or MSS after all packets sent out during last RTT have been acked) ...
Network Coding Meets TCP
... • Devise a system that behaves as close to TCP as possible, while masking non-congestion wireless losses from congestion control where possible. – Standard TCP/wireless problem. ...
... • Devise a system that behaves as close to TCP as possible, while masking non-congestion wireless losses from congestion control where possible. – Standard TCP/wireless problem. ...
Performance Evaluation of VoIP and TCP over wireless networks
... • TCP considers the loss of packets as a signal of network congestion and reduces its window • Consequently This results in severe throughput deterioration when packets are lost for other reasons than congestion. • Non congestion losses are mostly caused by transmission errors in the wireless enviro ...
... • TCP considers the loss of packets as a signal of network congestion and reduces its window • Consequently This results in severe throughput deterioration when packets are lost for other reasons than congestion. • Non congestion losses are mostly caused by transmission errors in the wireless enviro ...
ppt
... • Drop-tail queuing leads to bursty loss – If link is congested, many packets encounter full queue – Thus, loss synchronization: • Many flows lose one or more packets • In response, many flows divide sending rate in half ...
... • Drop-tail queuing leads to bursty loss – If link is congested, many packets encounter full queue – Thus, loss synchronization: • Many flows lose one or more packets • In response, many flows divide sending rate in half ...
Vertical optimization of data transmission for mobile wireless terminals
... overhead needed to transmit a certain chunk of data. The packet length can be changed by either reducing the size of a TCP packet or introducing fragmentation at the MAC level. That basically the same conclusions apply when the focus is on energy consumption instead of ...
... overhead needed to transmit a certain chunk of data. The packet length can be changed by either reducing the size of a TCP packet or introducing fragmentation at the MAC level. That basically the same conclusions apply when the focus is on energy consumption instead of ...
Dan's slide set
... • Too large window worse than too small – Too large: dropped packets retransmitted making congestion worse – Too small: can’t send as many packets without receiving an ACK ...
... • Too large window worse than too small – Too large: dropped packets retransmitted making congestion worse – Too small: can’t send as many packets without receiving an ACK ...
Yee-Ting Li
... measurements to al other nodes Uses standard UNIX infrastructure – ssh – Should be easily adaptable to using Globus certifications once interactive processing is introduced ...
... measurements to al other nodes Uses standard UNIX infrastructure – ssh – Should be easily adaptable to using Globus certifications once interactive processing is introduced ...
Transmission Control Protocol (TCP)
... and New-Reno can retransmit only one lost packet per round-trip time What about TCP-Tahoe? SACK enables receiver to give more information to sender about received packets allowing sender to recover from multiplepacket losses faster ...
... and New-Reno can retransmit only one lost packet per round-trip time What about TCP-Tahoe? SACK enables receiver to give more information to sender about received packets allowing sender to recover from multiplepacket losses faster ...