PPT-15-440 Distributed Systems Lecture 20 – DNS and

15440 Distributed Systems Lecture 20 DNS and CDNs Copyright 200710 Carnegie Mellon University Outline DNS Design DNS Today Content Distribution Networks 2 Naming How do we efficiently locate resources DNS name IP address. Domain Name System. Steve Ko. Computer Sciences and Engineering. University at Buffalo. Last Time. Global states. A union of all process states. Consistent global state vs. inconsistent global state. EE122 Fall 2011. Scott Shenker. http://. inst.eecs.berkeley.edu. /~ee122/. Materials with thanks to Jennifer Rexford, Ion . Stoica. , Vern . Paxson. and other colleagues at Princeton and UC Berkeley. Assessing their server availability.. Quantifying their world-wide delay performance.. How to improve delay performance by adding servers.. ABSTRACT. Conduct extensive and thorough measurements that accurately characterize the performance of two large-scale commercial CDNs: Akamai and Limelight.. DoS. Attacks. Hitesh . Ballani. , Paul Francis. 1. Outline. What is DNS?. What is the . P. roblem?. Solution. Evaluation. Conclusions. 2. Domain Name System. 3. Client. DNS Resolver. Root . Nameserver. Vijay Tinnanur & Jonathan Tuliani. Azure Networking. BRK3473. Agenda . Context. DNS . services in Azure. Introducing Azure DNS . Azure DNS Deep Dive. Demo . Context. Why DNS ?. Where is . www.contoso.com. Jun Ho Huh. Research Scientist. Cybersecurity Lab. . Saurabh Verma, . Ali Hamieh, Jun Huh Ho, Siva Raj Rajagopalan, Maciej Korczynski, Nina Fefferman.. . 1. Motivation . money talks!. . 2. It’s becoming very serious!. domainfest.asia. . 20 Sep 2016 Hong Kong richard.lamb@icann.org. What’s all this I hear about the Internet of Things?. (A recent visit to CES in Las Vegas). BS or Not BS?. Does it matter?. Where do “WE” fit in?. Sylvia Ratnasamy. http://inst.eecs.berkeley.edu/~ee122. /. Material thanks to Ion . Stoica. , Scott . Shenker. , Jennifer Rexford, Nick . McKeown. , and many other colleagues. Announcements. Project 3 out on Wednesday, Oct 30. Revised 10/12/16. DNS. (What’s in a Name?). Human Involvement. If you want to…. Call someone, you need to ask for their phone number. You can’t just dial “P R O F . F N E S”. Mail someone, you need to get their address first. Sig Freund. CSC 8320 Fall . 2008. rfreund1@student.gsu.edu. Transparency in Distributed Operating Systems. Evolution of Modern Operating Systems. Centralized operating system. network access and resource sharing. Shenker. and John . Jannotti. Rodrigo Fonseca. Administrivia. Thursday: . TCP Milestone II. HW3 Out. Midterm back early next week. This week: application layer (DNS, Web). We know how to open TCP connections to a server/port:. Prof. Nalini . Venkatasubramanian. . &. Prof. Yusuf . Sarwar. Dept. of Information & Computer Science. University of California, Irvine. Intro to Distributed Systems Middleware. 2. CS 237/. NetSys. Host addresses: . e.g., 169.229.131.109. a number used by protocols. conforms to network structure (. the “where”. ). Host names: . e.g., . instr.eecs.berkeley.edu. mnemonic name usable by humans. Making Windows DNS Server Cloud Ready. ~Kumar Ashutosh, Microsoft. Windows DNS Server. Widely deployed in enterprises . Fair presence in the DNS resolver . space. Standards compliant and interoperable.