comp0023-lecture6-dns The Domain Name System Stefano Vissicchio UCL Computer Science COMP0023 Today 1. The Domain Name System (DNS) 2. A Brief Word on DNS Security A name indicates what we seek. An address indicates where it is. A route indicates how we get there. Jon Postel 3 Hostnames vs. IP Addresses • Hostnames – Mnemonic name […]
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The Assignment 3 Specification and Marking Criteria Some Theoretical Issues in Distributed Systems In the assignment, you are to address some theoretical issues in the area of distributed systems or distributed computing. You will need to demonstrate your understanding of these theoretical issues or competence to apply these theoretical issues. These theoretical issues have been
Introduction to Information Retrieval Online edition (c) 2009 Cambridge UP An Introduction to Information Retrieval Draft of April 1, 2009 Online edition (c) 2009 Cambridge UP Online edition (c) 2009 Cambridge UP An Introduction to Information Retrieval Christopher D. Manning Prabhakar Raghavan Hinrich Schütze Cambridge University Press Cambridge, England Online edition (c) 2009 Cambridge UP
4.P2P_CDN_Transport_n P2P + CDN + Transport Layer Part 1 Computer Networks and Applications Week 4 COMP 3331/COMP 9331 Reading Guide: Chapter 2, 2.5, 2.6, 2.7 + Chapter 3, Sections 3.1 – 3.4 2 Application Layer: outline 2.1 principles of network applications 2.2 Web and HTTP 2.3 electronic mail • SMTP, POP3, IMAP 2.4 DNS 2.5
Application_Part2_nn Application Layer (Email, DNS) Computer Networks and Applications Week 3 COMP 3331/COMP 9331 Reading Guide: Chapter 2, Sections 2.3, 2.4 Application Layer: outline 2.1 principles of network applications § app architectures § app requirements 2.2 Web and HTTP 2.3 electronic mail § SMTP, POP3, IMAP 2.4 DNS 2.5 P2P applications 2.6 video streaming and
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Warnings…. • Format Warning: – Today’s slides are borrowed from CSE473 without being properly converted to this class’s google slides format…. • Coverage Warning – Included are some details that we have not covered the background material for so we will gloss over some areas. CSE 523S: Systems Security Computer & Network Systems Security Spring
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comp0023-lecture12-dvrouting Introduction to� Intra-Domain Routing Stefano Vissicchio UCL Computer Science COMP0023 Agenda • We delve into network layer’s main functionality 1. Setting • Context • Routing players 2. Intra-domain routing problem definition 2 Let’s consider a network with several LANs 3 host host host DNS… router router 5.6.7.0/24 5.6.7.11 host 1.2.3.156 1.2.3.48 DNS 1.2.3.19 1.2.2.0/23
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1 INTRODUCTION A modem computer consists of one or more processors, some main memory, disks, printers, a keyboard, a mouse, a display, network interfaces, and various other input/output devices. All in all, a complex system. If every application pro grammer had to understand how all these things work in detail, no code would ever get
Network Layer All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved George Parisis School of Engineering and Informatics University of Sussex Network Layer 4-2 v introduction v virtual circuit and datagram networks v what’s inside a router v IP: Internet Protocol § datagram format § IPv4 addressing § ICMP, IPv6 v routing
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Modern Information Retrieval Chapter 12 Web Crawling with Carlos Castillo Applications of a Web Crawler Architecture and Implementation Scheduling Algorithms Crawling Evaluation Extensions Examples of Web Crawlers Trends and Research Issues Web Crawling, Modern Information Retrieval, Addison Wesley, 2010 – p. 1 Introduction and a Brief History A Web Crawler is a software for downloading