'Send ack' diaporamas de présentation

Lecture 11 and 12

695 views • 62 slides

Lecture 11 and 12

710 views • 62 slides

Transport Control Protocol (TCP) (Reliable Byte-Stream)

Transport Control Protocol (TCP) (Reliable Byte-Stream). Outline. Transport Protocols (multiplexing and demul) Sliding Window Revisited Flow Control Adaptive Timeout Connection Establishment/Termination. TCP. UDP. IP. Ethernet. FDDI. ATM. Modem. Internet Protocol (IP) Graph. BGP.

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CIS 720

CIS 720. Distributed algorithms. Broadcast over a tree. Broadcast in an arbitrary graph. Initiator: num_recd = 0; sum = x init ; send bcast() to all nbrs; while (num_recd != num_nbrs) receive m from j; if m = ack(y) ? sum = sum + y; num_recd++;

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Transport Control Protocol (TCP) (Reliable Byte-Stream)

Transport Control Protocol (TCP) (Reliable Byte-Stream). Outline. Transport Protocols (multiplexing and demul) Sliding Window Revisited Flow Control Adaptive Timeout Connection Establishment/Termination. End-to-End Protocols. Underlying best-effort IP network drop messages

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Data Link Layer

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Chapter 5 TCP Sequence Numbers & TCP Transmission Control

Chapter 5 TCP Sequence Numbers & TCP Transmission Control. Networking CS 3470, Section 1. Sequence Number. SequenceNum field contains the sequence number for the first byte of data carried in segment Important for ??. Sequence Number.

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ITEC452 Distributed Computing Lecture 6 Mutual Exclusion

Hwajung Lee. ITEC452 Distributed Computing Lecture 6 Mutual Exclusion. Mutual Exclusion. CS. p0. CS. p1. CS. p2. CS. p3. Why mutual exclusion?. Some applications are: Resource sharing Avoiding concurrent update on shared data Controlling the grain of atomicity

493 views • 36 slides

ITEC452 Distributed Computing Lecture 6 Mutual Exclusion

Hwajung Lee. ITEC452 Distributed Computing Lecture 6 Mutual Exclusion. Mutual Exclusion. CS. p0. CS. p1. CS. p2. CS. p3. Why mutual exclusion?. Some applications are: Resource sharing Avoiding concurrent update on shared data Controlling the grain of atomicity

497 views • 36 slides

Data Link Layer

Data Link Layer. Data link layer. The communication between two adjacent machines. Basic property If bit A is sent before bit B, bit A will be received earlier than bit B Fundamental constraints Errors Computers have different capabilities Delay is not zero. Data link layer.

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Termination Detection

Termination Detection. Goal. Study the development of a protocol for termination detection with the help of invariants. Termination Detection. Rules: A process is either active or passive An active process can become passive at any time

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Chapter 5 TCP Transmission Control

Chapter 5 TCP Transmission Control. Networking CS 3470, Section 1. Triggering Transmission. How does TCP decide to transmit a segment? TCP supports a byte stream abstraction Application programs write bytes into streams It is up to TCP to decide that it has enough bytes to send a segment.

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Announcement

Announcement. Project 1 due last night, how is that ? Project 2 almost ready, out tomorrow, will post online Much harder than project 1, start early!. Review of Previous Lecture. Transport-layer services Multiplexing and demultiplexing Connectionless transport: UDP

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Mutual Exclusion

Mutual Exclusion. CS. p0. CS. p1. CS. p2. CS. p3. Why mutual exclusion?. Some applications are: Resource sharing Avoiding concurrent update on shared data Controlling the grain of atomicity Medium Access Control in Ethernet Collision avoidance in wireless broadcasts. Specifications.

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Mutual Exclusion Problem Specifications

Mutual Exclusion Problem Specifications. ME1 . At most one process in the CS. ( Safety property ) ME2 . No deadlock. ( Safety property ) ME3 . Every process trying to enter its CS must eventually succeed. This is called progress . ( Liveness property )

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Communication Networks

Communication Networks. Recitation 7 RDT, CLOS & DV Revisited. Reliable Transmission. How do we send a packet reliably when it can be lost and/or corrupted in the network? Mechanisms Acknowledgements Timeouts Simplest reliable protocol: Simple Stop and Wait send a packet

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Formalisms for Behaviors Specification

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MSC1

HLR for all 718-555 numbers. SS7 Network. HLR. PSTN Switch C. VLR2. PSTN Switch D. 2. VLR1. 2. 5. MSC2. 415-555. 3. MSC1. 2. 1. PSTN Switch A. 718-555. 2. PSTN Switch E. 3. 1. PSTN Switch B. 1. Link weights (used for shortest-path routing). 718-555-1234.

215 views • 2 slides