Www.ciscopress.com Copyright 2003 CCNA 2 Chapter 19 Intermediate TCP/IP By Your Name. - презентация

1 Copyright 2003 CCNA 2 Chapter 19 Intermediate TCP/IP By Your Name

2 Copyright 2003 Objectives TCP operation Transport layer ports

3 Copyright 2003 TCP/IP Operation The transport layer is responsible for the reliable transport of and regulation of data flow from source to destination.

4 Copyright 2003 TCP Three-Way Handshake/Open Connection

5 Copyright 2003 Denial-of-Service Attacks Denial-of-service (DoS) attacks are designed to deny services to legitimate hosts attempting to establish connections.

6 Copyright 2003 TCP Windowing

7 Copyright 2003 Acknowledgment Numbers

8 Copyright 2003 TCP Simple Acknowledgment

9 Copyright 2003 UDP Operation

10 Copyright 2003 Transport Layer Ports

11 Copyright 2003 Port Numbers Numbers below 255 are reserved for public applications. Numbers from 255–1023 are assigned to companies for marketable applications. Numbers above 1023 are unregulated.

12 Copyright 2003 Ports for Clients: TCP and UDP Segment Format UDP TCP

13 Copyright 2003 Port Numbering