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CMPE 150 – Winter 2009

CMPE 150 – Winter 2009

CMPE 150 – Winter 2009. Lecture 16 March 3, 2009 P.E. Mantey. CMPE 150 -- Introduction to Computer Networks. Instructor: Patrick Mantey mantey@soe.ucsc.edu http://www.soe.ucsc.edu/~mantey/ Office: Engr. 2 Room 595J Office hours: Tues 3-5 PM, Mon 5-6 PM*

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773 views • 62 slides
The Kangaroo approach to Data movement on the Grid

The Kangaroo approach to Data movement on the Grid

The Kangaroo approach to Data movement on the Grid. Rajesh Rajamani (raj@cs.wisc.edu) June 03, 2002. Condor and the Grid. What is the Grid?. Grid applications tend to have demanding I/O needs. Process/produce large amounts of data Need for an efficient mechanism to transfer data.

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379 views • 35 slides
Checksum ‘offloading’

Checksum ‘offloading’

Checksum ‘offloading’. A look at how the Pro1000 NICs can be programmed to compute and insert TCP/IP checksums. Network efficiency. Last time (in our ‘nictcp.c’ demo) we saw the amount of work a CPU would need to do when setting up an ethernet packet for transmission with TCP/IP protocol format

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438 views • 22 slides
Checksum ‘offloading’

Checksum ‘offloading’

Checksum ‘offloading’. A look at how the Pro1000 NICs can be programmed to compute and insert TCP/IP checksums. Network efficiency. Last time (in our ‘nictcp.c’ demo) we saw the amount of work a CPU would need to do when setting up an ethernet packet for transmission with TCP/IP protocol format

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288 views • 22 slides
TCP Checksum Errors

TCP Checksum Errors

TCP Checksum Errors. What’s the Problem. As I was using my Protocol Analyzer, I noticed a bunch of packets that had TCP CRC errors. The packets were all from my PC, but everything was working fine. I noticed that there weren’t any IP checksum errors, UDP Errors or ICMP checksum errors.

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456 views • 8 slides
TCP Checksum Errors

TCP Checksum Errors

TCP Checksum Errors. What’s the Problem. As I was using my Protocol Analyzer, I noticed a bunch of packets that had TCP CRC errors. The packets were all from my PC, but everything was working fine. I noticed that there weren’t any IP checksum errors, UDP Errors or ICMP checksum errors.

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235 views • 8 slides
CSCE 515 : Computer Network Programming

CSCE 515 : Computer Network Programming

CSCE 515 : Computer Network Programming. Chin-Tser Huang huangct@cse.sc.edu University of South Carolina. Transmission Control Protocol (TCP). A connection-oriented transport layer protocol Transmit byte streams between both ends of connection Full-duplex service Provide reliable service.

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104 views • 8 slides

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