Re-ECN - Bob Briscoe
... • ‘legacy’ ECN receiver repeats ECE for a round trip until CWR • hides second and subsequent CE per RTT • new CE counter technique in draft – uses three flags in TCP options as a 3-bit CountCE counter, modulo 8 – still safe against pure ACK losses if ack’d seqno gap ≥ 8, assume all missed ACKs marke ...
... • ‘legacy’ ECN receiver repeats ECE for a round trip until CWR • hides second and subsequent CE per RTT • new CE counter technique in draft – uses three flags in TCP options as a 3-bit CountCE counter, modulo 8 – still safe against pure ACK losses if ack’d seqno gap ≥ 8, assume all missed ACKs marke ...
61765 Computer Networks I
... Credits: 3.5; 3 lecture hours, 1 lab hour (2 hours every two weeks) Prerequisites: 61753 Algorithms in Graph Theory or 61713 Course Description This is an introductory course in computer networks and data communication methods. The TCP/IP layers are presented using a top-down approach, from the appl ...
... Credits: 3.5; 3 lecture hours, 1 lab hour (2 hours every two weeks) Prerequisites: 61753 Algorithms in Graph Theory or 61713 Course Description This is an introductory course in computer networks and data communication methods. The TCP/IP layers are presented using a top-down approach, from the appl ...
Introduction to Multimedia Systems
... – UDP (User Datagram Protocol): A simple protocol for short delay and unreliable communication. – TCP (Transmission Control Protocol): A much more complex protocol that guarantees correct data transmission. • By acknowledgement from the receiver. • Retransmission if time is out or data is corrupted. ...
... – UDP (User Datagram Protocol): A simple protocol for short delay and unreliable communication. – TCP (Transmission Control Protocol): A much more complex protocol that guarantees correct data transmission. • By acknowledgement from the receiver. • Retransmission if time is out or data is corrupted. ...
Re-ECN - Bob Briscoe
... not IETF role to pre-judge which is right answer to these socio-economic issues Internet needs all these answers – balance to be determined by natural selection ‘do-nothing’ doesn’t maintain liberal status quo, we just get more walls ...
... not IETF role to pre-judge which is right answer to these socio-economic issues Internet needs all these answers – balance to be determined by natural selection ‘do-nothing’ doesn’t maintain liberal status quo, we just get more walls ...
Reliable Networking
... Receiver: duplicate data packets when ACK lost Sender: duplicate ACKs when data believed lost but not really lost (only delayed) ...
... Receiver: duplicate data packets when ACK lost Sender: duplicate ACKs when data believed lost but not really lost (only delayed) ...
TCP in Wireless Networks
... to maintain throughput performance is to absorb the delay variability by a sufficiently large timeout value. The key idea of the delay-jitter algorithm is to increase the TCP timeout value by artificially injecting additional delay to some packets, as a means to adequately increase the mean deviatio ...
... to maintain throughput performance is to absorb the delay variability by a sufficiently large timeout value. The key idea of the delay-jitter algorithm is to increase the TCP timeout value by artificially injecting additional delay to some packets, as a means to adequately increase the mean deviatio ...
Review for midterm
... • Detect lost segments via duplicate ACKs. – Sender often sends many segments back-to-back ...
... • Detect lost segments via duplicate ACKs. – Sender often sends many segments back-to-back ...
Defense - Northwestern Networks Group
... Related Work • Myrinet – popular for cluster based supercomputers • Benefit: low latency • Cost: proprietary, host responsible for load balancing ...
... Related Work • Myrinet – popular for cluster based supercomputers • Benefit: low latency • Cost: proprietary, host responsible for load balancing ...
William Stallings Data and Computer Communications
... Standard or Nonstandard Nonstandard protocols built for specific computers and tasks K sources and L receivers leads to K*L protocols and 2*K*L implementations If common protocol used, K + L ...
... Standard or Nonstandard Nonstandard protocols built for specific computers and tasks K sources and L receivers leads to K*L protocols and 2*K*L implementations If common protocol used, K + L ...
Protocols - Computing Sciences
... A sends ‘Synchronize’ (SYN) message to B B sends ‘Synchronize Acknowledgement’ (SYN-ACK) message back to A A sends a ‘Forward Acknowledgment’ (ACK) to B Connection between A and B is now established. ...
... A sends ‘Synchronize’ (SYN) message to B B sends ‘Synchronize Acknowledgement’ (SYN-ACK) message back to A A sends a ‘Forward Acknowledgment’ (ACK) to B Connection between A and B is now established. ...
Introduction to Distributed Systems & Networking
... End-to-End Argument • If the network guaranteed packet delivery – one might think that the applications would be simpler • No need to worry about retransmits – But need to check that file was written to the remote disk intact ...
... End-to-End Argument • If the network guaranteed packet delivery – one might think that the applications would be simpler • No need to worry about retransmits – But need to check that file was written to the remote disk intact ...
PDF with Solutions
... NATs work by translating the source IP and port numbers. When a NAT device receives a packet from the internal network, it modifies the packet header and replaces the source IP address with its own IP address. The packet is then sent to the outside. The NAT device stores the original internal IP add ...
... NATs work by translating the source IP and port numbers. When a NAT device receives a packet from the internal network, it modifies the packet header and replaces the source IP address with its own IP address. The packet is then sent to the outside. The NAT device stores the original internal IP add ...
EECC694 - Shaaban
... – Used only when other congestion control methods in place fail. – When capacity is reached, routers or switches may discard a number of incoming packets to reduce their load. EECC694 - Shaaban #4 lec #8 Spring2000 3-30-2000 ...
... – Used only when other congestion control methods in place fail. – When capacity is reached, routers or switches may discard a number of incoming packets to reduce their load. EECC694 - Shaaban #4 lec #8 Spring2000 3-30-2000 ...
Chapter 3 - Department of Computer and Information Science and
... 1. estimate of how much SampleRTT deviates from ...
... 1. estimate of how much SampleRTT deviates from ...
Lec6
... : handles the movement of packets, i.e. Routing Transport Layer : provides a reliable flow of data between two hosts Application Layer : handles the details of the particular application ...
... : handles the movement of packets, i.e. Routing Transport Layer : provides a reliable flow of data between two hosts Application Layer : handles the details of the particular application ...
PDF (Updated 1/18)
... Flow control aims to eliminate the possibility of overflowing the receiver’s buffer. Receiver keeps track of two variables: ...
... Flow control aims to eliminate the possibility of overflowing the receiver’s buffer. Receiver keeps track of two variables: ...
Routing
... • Once a TCP connection has been terminated there is some unfinished business: – What if the ACK is lost? • The last FIN will be resent and it must be ACK’d. ...
... • Once a TCP connection has been terminated there is some unfinished business: – What if the ACK is lost? • The last FIN will be resent and it must be ACK’d. ...
PPT - Computer Sciences User Pages
... Provides requested service to client e.g., Web server sends requested Web page, mail server delivers email P2P is a very different model – No notion of client or server ...
... Provides requested service to client e.g., Web server sends requested Web page, mail server delivers email P2P is a very different model – No notion of client or server ...
Denial of Service Resilience in Ad Hoc Networks
... Periodic dropping attack in which attacking nodes drop all packets for a short duration (e.g., tens of ms) once per RTO Passive ...
... Periodic dropping attack in which attacking nodes drop all packets for a short duration (e.g., tens of ms) once per RTO Passive ...