• Introduction. • What is Software-Defined Network? • OpenFlow. • Research Problems in SDN

• What is Network Optimization? • Typical Models & Algorithms – Minimum Spanning Tree (最小(生成)树) – Minimum Arborescence (最小树形图) – Shortest Path (最短路) – Maximum Flow (最大流) – Minimum Cost Flow (最小费用流) – Matching (匹配)

Background and Motivation What is the brain network Platform and Algorithm Why and how we design accelerators Results Conclusion and future work What we can do next

• Why need networks • History of Networks • Network Classification • Layered Network Model

• Networking basics • Network threats and vulnerabilities • WiFi security • Denial-of-service attacks • Network encryption concepts and tools • Types of firewalls and what they do • Intrusion detection and prevention systems • Security information and event management tools

Motivation: Network ≈ Wireless Interference Channel Approaches: NA in the middle, Precoding-Based NA PBNA Feasibility of PBNA Conclusion

• Cloud environment & Security problems in cloud • How to protect applications against Hypervisor/OS in cloud • Intel SGX, protecting applications against OS • SCONE (OSDI’16), using Intel SGX • How to protect user data against applications in cloud • Ryoan (OSDI’16), using NaCl (S&P’09) and Intel SGX • How to verify network security in cloud • TenantGuard (NDSS’17)， verifying network isolation in cloud

Broadcast Routing Route a packet from a source to all nodes in the network Possible solutions: – Flooding: Each node sends packet on all outgoing links Discard packets received a second time – Spanning Tree Routing: Send packet along a tree that includes all of the nodes in the network

一、控制测量(control survey) 1、目的与作用 (1)为测图或工程建设的测区建立统一的平面控制网(horizontal control network)和高 程控制网(vertical control network) (2)控制误差的积累 (3)作为进行各种细部测量的基准

7.1 What is network security? 7.2 Principles of cryptography 7.3 Authentication 7.4 Integrity 7.5 Key Distribution and certification 7.6 Access control: firewalls 7.7 Attacks and counter measures 7.8 Security in many layers