PCC: Re-architecting Congestion Control for Consistent High Performance
... In fact, today’s production networks have moved to a level of complexity beyond the assumptions embedded in any hardwired mapping: old and unreliable routers, failing wires, links from Kbps to 100 Gbps, unstable routing paths, AQMs, software routers, rate shaping at gateways, virtualization layers a ...
... In fact, today’s production networks have moved to a level of complexity beyond the assumptions embedded in any hardwired mapping: old and unreliable routers, failing wires, links from Kbps to 100 Gbps, unstable routing paths, AQMs, software routers, rate shaping at gateways, virtualization layers a ...
Running virtualized native drivers in User Mode Linux
... window simulation server Figure 2: Architecture of our wireless emulator ...
... window simulation server Figure 2: Architecture of our wireless emulator ...
Wire-Speed Total Order
... the number of circulating auxiliary control messages in the system, the ACKs are aggregated according to a configurable threshold parameter. If the system settings are such that each sender node is also a receiver, the ACK messages can be piggybacked on regular data messages. For the sake of reliab ...
... the number of circulating auxiliary control messages in the system, the ACKs are aggregated according to a configurable threshold parameter. If the system settings are such that each sender node is also a receiver, the ACK messages can be piggybacked on regular data messages. For the sake of reliab ...
lecture 03 - UniMAP Portal
... Go-Back-N significant improvement over Stop-and-Wait for large delay-bandwidth product Go-Back-N becomes inefficient as error rate increases ...
... Go-Back-N significant improvement over Stop-and-Wait for large delay-bandwidth product Go-Back-N becomes inefficient as error rate increases ...
IC3: Network Security _______________ Firewalls
... Rules specify which packets are allowed through the Firewall, and which are dropped Rules must allow for packets in both directions Rules may specify source / destination IP addresses, and source / destination TCP / UDP port numbers Certain (common) protocols are very difficult to support securely ( ...
... Rules specify which packets are allowed through the Firewall, and which are dropped Rules must allow for packets in both directions Rules may specify source / destination IP addresses, and source / destination TCP / UDP port numbers Certain (common) protocols are very difficult to support securely ( ...
Introduction to Operating Systems
... keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the all-new PTW attack, thus making the attack much faster compared to other WEP cracking tools. In fact, Aircra ...
... keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the all-new PTW attack, thus making the attack much faster compared to other WEP cracking tools. In fact, Aircra ...
Quality of Service Guarantee on 802.11 Networks
... there is no NRT traffic, the token is still passed among NRT nodes until the current cycle ends. That is, RT nodes can never send data at a higher rate than their reservation even when other RT or NRT nodes have less data to send. A nonwork-conserving model reduces the extent of data burst and thus ...
... there is no NRT traffic, the token is still passed among NRT nodes until the current cycle ends. That is, RT nodes can never send data at a higher rate than their reservation even when other RT or NRT nodes have less data to send. A nonwork-conserving model reduces the extent of data burst and thus ...
Chapter 1 - Web Services Overview
... when packet arrives to full queue, packet is dropped (aka lost) ...
... when packet arrives to full queue, packet is dropped (aka lost) ...
ppt - CSE Labs User Home Pages
... • Active measurement, incur overhead/load on routers • Not routers all respond to traceroutes • IP address aliasing problem; – Also MPLS tunnels may “obscure” real topology ...
... • Active measurement, incur overhead/load on routers • Not routers all respond to traceroutes • IP address aliasing problem; – Also MPLS tunnels may “obscure” real topology ...
7 Programming client-server communication UDP
... hosts. TCP uses session IDs to keep track of connections between two hosts. UDP doesn't have any support for sessions due to its connection-less nature. Reliability. UDP does not guarantee that only one copy of the data will be delivered to the destination. To send large amounts of data to the end s ...
... hosts. TCP uses session IDs to keep track of connections between two hosts. UDP doesn't have any support for sessions due to its connection-less nature. Reliability. UDP does not guarantee that only one copy of the data will be delivered to the destination. To send large amounts of data to the end s ...
uk-sony-v-ssh
... “123.125.0.0/16”, which matches the first sixteen bits, then it will send the IPv4 packet out on the network interface associated with that prefix. If on the other hand it has a longer prefix of say “123.125.78.0/24”, that is a prefix of 24 bits, then it will send the packet out on the network inter ...
... “123.125.0.0/16”, which matches the first sixteen bits, then it will send the IPv4 packet out on the network interface associated with that prefix. If on the other hand it has a longer prefix of say “123.125.78.0/24”, that is a prefix of 24 bits, then it will send the packet out on the network inter ...
Network Layer (4) - FSU Computer Science Department
... • The NAT box will convert the internal IP address to the real IP address of the company, and pass the packet to the gateway router. • When there is a packet destined for an internal machine arrived at the router, what should the router and NAT box do? • For IP packets carrying TCP or UDP, use port ...
... • The NAT box will convert the internal IP address to the real IP address of the company, and pass the packet to the gateway router. • When there is a packet destined for an internal machine arrived at the router, what should the router and NAT box do? • For IP packets carrying TCP or UDP, use port ...
Chapter3 Transport Layer1
... Provides an unreliable datagram service Packets may be lost or delivered out of order No buffer at sender or receiver Unreliable, but fast Application must deal with lost or corrupt packets ...
... Provides an unreliable datagram service Packets may be lost or delivered out of order No buffer at sender or receiver Unreliable, but fast Application must deal with lost or corrupt packets ...
HW1 Solution
... router, and 17 on every other router. This would be of the form: • (prefix, halfbyte, unmatched) routes to the port indexed by halfbyte, where prefix is the total specified address on the parent router that points to this router on its 17th port; • default route goes to port 17; • the root router is ...
... router, and 17 on every other router. This would be of the form: • (prefix, halfbyte, unmatched) routes to the port indexed by halfbyte, where prefix is the total specified address on the parent router that points to this router on its 17th port; • default route goes to port 17; • the root router is ...
Lecture 2 - Lyle School of Engineering
... (ARQ- automatic repeat request) than correct (FECforward error correction) if bit error rate is low ARQ involves overhead cost per packet + costs for ACKs + costs for retransmissions, but retransmissions will be rare if bit error rate is low FEC requires more code bits per frame → more overhead cost ...
... (ARQ- automatic repeat request) than correct (FECforward error correction) if bit error rate is low ARQ involves overhead cost per packet + costs for ACKs + costs for retransmissions, but retransmissions will be rare if bit error rate is low FEC requires more code bits per frame → more overhead cost ...
Darwin: Customizable Resource Management for Value
... » Recover from collision by trying after random delay – Too short large number of collisions – Too long underutilization ...
... » Recover from collision by trying after random delay – Too short large number of collisions – Too long underutilization ...
SIMPLEStone - Presence server benchmarking
... presence information to the watchers. SIMPLEStone proposes a simple set of metrics for evaluating and benchmarking the performance of SIMPLE based presence system. SIMPLEStone benchmarks the presence server by generating requests based on a work load specification. SIMPLEStone proposes to measure se ...
... presence information to the watchers. SIMPLEStone proposes a simple set of metrics for evaluating and benchmarking the performance of SIMPLE based presence system. SIMPLEStone benchmarks the presence server by generating requests based on a work load specification. SIMPLEStone proposes to measure se ...
ICMP and TCP - La Salle University
... In the client/server model, a computer acting as a server typically has many services available, so the client must specify not only which computer but which port. Port numbers are from 0 to 65536. Ports 0 to 1024 are reserved for use by certain privileged services. CSIT 220 (Blum) ...
... In the client/server model, a computer acting as a server typically has many services available, so the client must specify not only which computer but which port. Port numbers are from 0 to 65536. Ports 0 to 1024 are reserved for use by certain privileged services. CSIT 220 (Blum) ...
A Platform for Unobtrusive Measurements on PlanetLab Rob Sherwood Neil Spring Abstract
... Figure 1: Sidecar is a platform for unobtrusive measurements that provides an event-driven interface and connecInternet measurement is key to optimizing performance, tion tracking to higher-level tools, e.g., artrat, sideping. building overlay topologies, developing improved transport protocols, und ...
... Figure 1: Sidecar is a platform for unobtrusive measurements that provides an event-driven interface and connecInternet measurement is key to optimizing performance, tion tracking to higher-level tools, e.g., artrat, sideping. building overlay topologies, developing improved transport protocols, und ...
lec 3 - handout3
... • AF defines 4 classes with some bandwidth and buffers allocated to them. • The intent is that it will be used to implement services that differ relative to each other (e.g., gold, silver,…). • Within each class, there are three drop priorities, which affect which packets will get dropped first if t ...
... • AF defines 4 classes with some bandwidth and buffers allocated to them. • The intent is that it will be used to implement services that differ relative to each other (e.g., gold, silver,…). • Within each class, there are three drop priorities, which affect which packets will get dropped first if t ...
"An Empirical Workload Model for Driving Wide-Area TCP/IP Network Simulations"
... of driving flow and congestion control algorithm simulations; interarrival times are themselves a function of existing flow control mechanisms. Interarrival times may be useful in characterizing interactive traffic due to its low volume. However, bulk traffic must be characterized by the amount of d ...
... of driving flow and congestion control algorithm simulations; interarrival times are themselves a function of existing flow control mechanisms. Interarrival times may be useful in characterizing interactive traffic due to its low volume. However, bulk traffic must be characterized by the amount of d ...
GNET-1の概要
... G-lambda project has been started in December 2004. Joint project of KDDI R&D labs., NTT, and AIST. We have defined a preliminary interface, and in cooperation with NICT, conducted a experiment using a JGN II GMPLS-based network test bed Live Demonstration at iGrid2005 and SC|05 ...
... G-lambda project has been started in December 2004. Joint project of KDDI R&D labs., NTT, and AIST. We have defined a preliminary interface, and in cooperation with NICT, conducted a experiment using a JGN II GMPLS-based network test bed Live Demonstration at iGrid2005 and SC|05 ...
Efficient Data Transfer Protocols for Big Data
... a number of important considerations govern the ability of RDMA-based applications to achieve expected performance over the WAN, especially as latency increases. It is well understood that the transmission of buffers over the network must be pipelined in order to keep enough data “in-flight” and sat ...
... a number of important considerations govern the ability of RDMA-based applications to achieve expected performance over the WAN, especially as latency increases. It is well understood that the transmission of buffers over the network must be pipelined in order to keep enough data “in-flight” and sat ...