18-441/741: Computer Networks Lectures 2: Protocol Stack Swarun Kumar 1 Today’s Lecture • Network applications • Requirements • Latency and bandwidth • Internet architecture • Protocols • A layered design • Life of a packet • Network utilities 2 Applications and Application Protocols • Application: communicating, distributed processes • Running in network hosts in “user […]
FTP Server —— Final Project BUPT/QMUL 2021-5-13 Agenda ◼ Project description ◼ Demonstration ◼ Timesheet Agenda ◼ Project description ◼ Demonstration ◼ Timesheet Project description – 1 ◼ Subject:FTPServer ◼ Goals ◼ UnderstandingFTP ◼ Implement an FTP server program ◼ Using ftp command as client, and the communication between client and server could be captured
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Vulnerability Management The Vulnerability Management Process 2 Vulnerability Databases • CVE: Common Vulnerabilities and Exposures • CPE: Common Platform Enumeration • CVSS: Common Vulnerability Scoring System ― Used to score vulns for prioritization, based on ▪ Proximity of attack vector, attack complexity, privileges required, user interaction required, etc. • Mostly parts of NVD (National Vulnerability
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COMP30023 – Computer Systems Application Layer – HTTP and HTML Dr Lachlan Andrew Recap • History of the internet • Network Protocol Models (stacks) • OSI vs TCP/IP • Acknowledgement: • These slides are minor modifications of those prepared by Dr Chris Culnane © 2021 University of Melbourne 2 Summary • Top-down approach – We’llgraduallypeelawaythelayersoverthecomingweeks
COMP30023 – Computer Systems 2018 – Semester 1 – Week 7 – Lecture 1 Internet (Network) Layer – NAT, Fragmentation and Subnets Dr Lachlan Andrew © University of Melbourne 2021 Recap • Network layer services • Connectionless and connection-oriented • Forwarding tables • QoS • IP addresses © University of Melbourne 2021 3 Summary •
COMP30023 – Computer Systems Introduction to Networks & OSI Layers Dr Lachlan Andrew ©2021 University of Melbourne How to be successful • Understand the material, don’t just memorize it. • If you fall behind, try to catch up as fast as possible. • Attempt the workshop tasks every week. You should attempt the theory/tutorial questions
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Inter-Process Communication (IPC): Network Programming using TCP Java Sockets Dr. Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory School of Computing and Information Systems The University of Melbourne, Australia http://www.buyya.com 1 Agenda ◼ Introduction ◼ Networking Basics ◼ Understanding Ports and Sockets ◼ Java Sockets ◼ Implementing a Server ◼ Implementing a Client ◼
Most concepts are drawn from Chapter 11 Distributed Systems: Security Revised and Updated by: Rajkumar Buyya Chapter 2 Revision: Security Model Some Cyber Security Facts https://www.cybintsolutions.com/cyber-security-facts-stats/ 1. 95% of breached records came from only three industries in 2016 – Government, retail, and technology (high level of personal identifying information contained in their records)
Module 7: DHCPv4 Switching, Routing and Wireless Essentials v7.0 (SRWE) Module Objectives Module Title: DHCPv4 Module Objective: Implement DHCPv4 to operate across multiple LANs Topic Title Topic Objective DHCP4 Concepts Explain how DHCPv4 operates in a small- to medium- sized business network. Configure a Cisco IOS DHCP4 Server Configure a router as a DHCPv4 server.
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Module 10: LAN Security Concepts Switching, Routing and Wireless Essentials v7.0 (SRWE) Module Objectives Module Title: LAN Security Concepts Module Objective: Explain how vulnerabilities compromise LAN security Topic Title Topic Objective Endpoint Security Explain how to use endpoint security to mitigate attacks Access Control Explain how AAA and 802.1x are used to authenticate LAN endpoints
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