Lecture 08: Networking services: there s no place like
|
|
- Jeffery McKinney
- 5 years ago
- Views:
Transcription
1 Lecture 08: services: there s no place like Hands-on Unix system administration DeCal / 22
2 About Common records Other records 2 / 22
3 About About Common records Other records Domain Name Service Internet s /etc/hosts file client software (e.g., web browser) automatically asks server for records requests passed between servers see also host, dig 3 / 22
4 Common records About Common records Other records A: IPv4 address AAAA: IPv6 address CNAME an alias for another record (Canonical Name) MX: mail server(s) for a domain (Mail Exchanger) PTR: reverse A record (Pointer) 4 / 22
5 Other records About Common records Other records SRV: service TXT: text 5 / 22
6 Too many TLAs TCP UDP NATs Port forwarding HTTP NFS 6 / 22
7 Too many TLAs Too many TLAs TCP UDP NATs Port forwarding HTTP NFS OSI reference model, we focus on application layer transport protocols: TCP, UDP ports numbered between 1 and (unsigned 16 bit integer) ports below 1024 (e.g., 22/tcp, 80/tcp HTTP), require root access on Unix 7 / 22
8 TCP Too many TLAs TCP UDP NATs Port forwarding HTTP NFS Transmission Control Protocol reliable, more overhead, stateful most network services use TCP (HTTP, SMTP,, etc.) some may use both TCP and UDP 8 / 22
9 UDP Too many TLAs TCP UDP NATs Port forwarding HTTP NFS User Datagram Protocol unreliable, simple ( fast ), stateless often used by, DHCP, TFTP, VoIP, streaming media, etc. uses TCP, however, for larger responses 9 / 22
10 NATs Too many TLAs TCP UDP NATs Port forwarding HTTP NFS Network Area Translation accomplished by home/office router rewrite packets for many computers to use one public IP address (Source NAT, IP Masquerading) private IP addresses: , , / 22
11 Port forwarding Too many TLAs TCP UDP NATs Port forwarding HTTP NFS also called Destination NAT (DNAT) forward a public IP addressed port to an internal IP addressed port required to access services behind a Source NAT 11 / 22
12 HTTP Too many TLAs TCP UDP NATs Port forwarding HTTP NFS Hyper-Text Transfer Protocol simple, text-based protocol basic web server can be implemented in a 25-line bash script with netcat popular servers: Apache, IIS, lighttpd, nginx 12 / 22
13 NFS Too many TLAs TCP UDP NATs Port forwarding HTTP NFS Network File System mounts can be defined in /etc/fstab usually need to be root to mount 13 / 22
14 About public-private Publicprivate Symmetric PAM 14 / 22
15 About About public-private Publicprivate Symmetric PAM Secure SHell different authentication mechanisms: PAM, public key, GSSAPI (Kerberos) remote encrypted terminal/console on remote machine other features: port forwarding, X forwarding, file transfer, can be combined with other protocols 15 / 22
16 public-private About public-private Publicprivate Symmetric PAM alternative to password-based authentication uses public/private key cryptography agent caches key in memory forwarding forwards key challenges 16 / 22
17 Public-private About public-private Publicprivate Symmetric PAM public key: everyone can see lock private key: one person has key encrypt with public key, decrypt with private key sign with private key, verify with public key ciphers: RSA, DSA 17 / 22
18 Symmetric About public-private Publicprivate Symmetric PAM one shared key advantage: speed, security disadvantage: often impractical to verify, especially against man-in-the-middle attacks ciphers: AES, 3DES, blowfish, arcfour 18 / 22
19 PAM About public-private Publicprivate Symmetric PAM Pluggable Authentication Modules API for authentication commonly used on Unix pam_unix: /etc/shadow password hashes 19 / 22
20 LDAP Kerberos 20 / 22
21 LDAP LDAP Kerberos Lightweight Directory Access Protocol distributed directory information service, like phone book arranged as records with attributes often used to populate user accounts across a network CalNet is an LDAP directory 21 / 22
22 Kerberos LDAP Kerberos trusted third party provides mutual authentication between machines and users arranged as principals which can be fetched as tickets to authenticate CalNet is also a Kerberos realm 22 / 22
Radius, LDAP, Radius, Kerberos used in Authenticating Users
CSCD 303 Lecture 5 Fall 2018 Radius, LDAP, Radius, Kerberos used in Authenticating Users Kerberos Authentication and Authorization Previously Said that identification, authentication and authorization
More informationMTA_98-366_Vindicator930
MTA_98-366_Vindicator930 Number: 98-366 Passing Score: 700 Time Limit: 45 min File Version: 1.0 http://www.gratisexam.com/ Microsoft Technology Associate Networking Fundamentals MTA 98-366 Exam A QUESTION
More information06/02/ Local & Metropolitan Area Networks. 0. Overview. Terminology ACOE322. Lecture 8 Network Security
1 Local & Metropolitan Area Networks ACOE322 Lecture 8 Network Security Dr. L. Christofi 1 0. Overview As the knowledge of computer networking and protocols has become more widespread, so the threat of
More informationConfigure Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) Service Settings on a Switch
Configure Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) Service Settings on a Switch Objective Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are transportation
More informationOperating Systems Design Exam 3 Review: Spring Paul Krzyzanowski
Operating Systems Design Exam 3 Review: Spring 2012 Paul Krzyzanowski pxk@cs.rutgers.edu 1 Question 1 An Ethernet device driver implements the: (a) Data Link layer. (b) Network layer. (c) Transport layer.
More informationRadius, LDAP, Radius used in Authenticating Users
CSCD 303 Lecture 5 Fall 2017 Kerberos Radius, LDAP, Radius used in Authenticating Users Introduction to Centralized Authentication Kerberos is for authentication only and provides Single Sign-on (SSO)
More informationLayer 4: UDP, TCP, and others. based on Chapter 9 of CompTIA Network+ Exam Guide, 4th ed., Mike Meyers
Layer 4: UDP, TCP, and others based on Chapter 9 of CompTIA Network+ Exam Guide, 4th ed., Mike Meyers Concepts application set transport set High-level, "Application Set" protocols deal only with how handled
More information( A ) 1. WAP is a (A) protocol (B) hardware (C) software (D) network architecture
CS 742 Computer Communication Networks Final Exam - Name: Fall 2003 Part 1: (75 points - 3 points for each problem) ( A ) 1. WAP is a (A) protocol (B) hardware (C) software (D) network architecture ( C
More informationCS519: Computer Networks. Lecture 6: Apr 5, 2004 Naming and DNS
: Computer Networks Lecture 6: Apr 5, 2004 Naming and DNS Any problem in computer science can be solved with another layer of indirection David Wheeler Naming is a layer of indirection What problems does
More informationInternet Technology. 06. Exam 1 Review Paul Krzyzanowski. Rutgers University. Spring 2016
Internet Technology 06. Exam 1 Review Paul Krzyzanowski Rutgers University Spring 2016 March 2, 2016 2016 Paul Krzyzanowski 1 Question 1 Defend or contradict this statement: for maximum efficiency, at
More informationIntroduction to TCP/IP
Introduction to TCP/IP Properties and characteristics of TCP/IP IPv4 IPv6 Public vs private vs APIPA/link local Static vs dynamic Client-side DNS settings Client-side DHCP Subnet mask vs CIDR Gateway TCP/IP
More informationChapter 7 Transport Layer. 7.0 Introduction 7.1 Transport Layer Protocols 7.2 TCP and UDP 7.3 Summary
Chapter 7 Transport Layer 7.0 Introduction 7.1 Transport Layer Protocols 7.2 TCP and UDP 7.3 Summary Transport Layer Transportation of Data Role of the Transport Layer The transport layer is responsible
More informationInternet Technology 3/2/2016
Question 1 Defend or contradict this statement: for maximum efficiency, at the expense of reliability, an application should bypass TCP or UDP and use IP directly for communication. Internet Technology
More informationApple 9L Mac OS X Security and Mobility Download Full Version :
Apple 9L0-625 Mac OS X Security and Mobility 10.6 Download Full Version : http://killexams.com/pass4sure/exam-detail/9l0-625 A. ipfw B. tcpfw C. sysctl D. Fwmgrd QUESTION: 61 A group of people are testing
More informationSecurity issues: Encryption algorithms. Threats Methods of attack. Secret-key Public-key Hybrid protocols. CS550: Distributed OS.
Security issues: Threats Methods of attack Encryption algorithms Secret-key Public-key Hybrid protocols Lecture 15 Page 2 1965-75 1975-89 1990-99 Current Platforms Multi-user timesharing computers Distributed
More informationCS 470 Spring Distributed Web and File Systems. Mike Lam, Professor. Content taken from the following:
CS 470 Spring 2017 Mike Lam, Professor Distributed Web and File Systems Content taken from the following: "Distributed Systems: Principles and Paradigms" by Andrew S. Tanenbaum and Maarten Van Steen (Chapters
More informationWireless Terminal Emulation Advanced Terminal Session Management (ATSM) Device Management Stay-Linked
Wireless Terminal Emulation Advanced Terminal Session Management (ATSM) Device Management Stay-Linked Secure Communications Stay-Linked Secure Communications Guide Page 1 Rev. 10.0.0 Dated: 04/26/10 Table
More informationIndicate whether the statement is true or false.
Indicate whether the statement is true or false. 1. Packet-filtering firewalls scan network data packets looking for compliance with the rules of the firewall s database or violations of those rules. 2.
More informationCS 470 Spring Distributed Web and File Systems. Mike Lam, Professor. Content taken from the following:
CS 470 Spring 2018 Mike Lam, Professor Distributed Web and File Systems Content taken from the following: "Distributed Systems: Principles and Paradigms" by Andrew S. Tanenbaum and Maarten Van Steen (Chapters
More informationIT 341: Introduction to System
IT 341: Introduction to System Administration Private IP Addresses and the Internet Using IP Addresses to Communicate Over the Internet Network Address Translation Private IP Addresses and the Internet
More informationChapter 8. Network Security. Cryptography. Need for Security. An Introduction to Cryptography 10/7/2010
Cryptography Chapter 8 Network Security Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security An Introduction
More informationAssignment - 1 Chap. 1 Wired LAN s
Assignment - 1 Chap. 1 Wired LAN s 1. (1 Mark) 1. Draw the frame format of Ethernet. 2. What is unicast, multicast and broadcast address? 3. State the purpose of CRC field. 2. (5 Marks) 1. Explain how
More informationARP, IP, TCP, UDP. CS 166: Introduction to Computer Systems Security 4/7/18 ARP, IP, TCP, UDP 1
ARP, IP, TCP, UDP CS 166: Introduction to Computer Systems Security 4/7/18 ARP, IP, TCP, UDP 1 IP and MAC Addresses Devices on a local area network have IP addresses (network layer) MAC addresses (data
More informationUsing keys with SSH Rob Judd
Using keys with SSH Rob Judd (rjudd@mlug.missouri.edu) Introduction SSH is a drop-in replacement for telnet that allows encrypted network connections. There are two main versions, 1.5 SSH-1 and 2.0 SSH-2
More informationHow to Integrate an External Authentication Server
How to Integrate an External Authentication Server Required Product Model and Version This article applies to the Barracuda Load Balancer ADC 540 and above, version 5.1 and above, and to all Barracuda
More informationTransport Layer TCP & UDP Week 7. Module : Computer Networks Lecturers : Lucy White Office : 324
Transport Layer TCP & UDP Week 7 Module : Computer Networks Lecturers : Lucy White lbwhite@wit.ie Office : 324 1 Purpose of the Transport Layer The Transport layer provides for the segmentation of data
More informationChapter 7. Local Area Network Communications Protocols
Chapter 7 Local Area Network Communications Protocols The Network Layer The third layer of the OSI Model is the network layer. The network layer is concerned with providing a means for hosts to communicate
More informationComputer Networks SYLLABUS CHAPTER - 2 : NETWORK LAYER CHAPTER - 3 : INTERNETWORKING
i SYLLABUS UNIT - 1 CHAPTER - 1 : INTRODUCTION Uses of Computer Networks, Network Hardware, Network Software, Reference Models (ISO-OSI, TCP/IP). CHAPTER - 2 : NETWORK LAYER Network Layer Design Issues,
More informationNew Topic: Naming. Differences in naming in distributed and non-distributed systems. How to name mobile entities?
New Topic: Naming Names are used to share resources, uniquely identify entities and refer to locations Need to map from name to the entity it refers to E.g., Browser access to www.cnn.com Use name resolution
More informationCourse Outline: Linux Professional Institute-LPI 202. Learning Method: Instructor-led Classroom Learning. Duration: 5.00 Day(s)/ 40 hrs.
Course Outline: Linux Professional Institute-LPI 202 Learning Method: Instructor-led Classroom Learning Duration: 5.00 Day(s)/ 40 hrs Overview: The LPI certification is a vendor-neutral Linux credential
More informationNetwork Layer, Link Layer, and Network Security Summary
CPSC 826 Internetworking, Link Layer, and Network Security Summary http://www.cs.clemson.edu/~mweigle/courses/cpsc826 1 Chapter 4, 5, 8 Topics» Forwarding and Routing» Router Architecture» Internet Protocol
More informationCCNA Exploration Network Fundamentals. Chapter 04 OSI Transport Layer
CCNA Exploration Network Fundamentals Chapter 04 OSI Transport Layer Updated: 05/05/2008 1 4.1 Roles of the Transport Layer 2 4.1 Roles of the Transport Layer The OSI Transport layer accept data from the
More information"Charting the Course... RHCE Rapid Track Course. Course Summary
Course Summary Description This course is carefully designed to match the topics found in the Red Hat RH299 exam prep course but also features the added benefit of an entire extra day of comprehensive
More informationA+ Guide to Software: Managing, Maintaining, and Troubleshooting, 5e. Chapter 8 Networking Essentials
A+ Guide to Software: Managing, Maintaining, and Troubleshooting, 5e Chapter 8 Networking Essentials Objectives Learn about the protocols and standards Windows uses for networking Learn how to connect
More informationGLOSSARY. Advanced Encryption Standard. Cisco Adaptive Security Appliance. Business-to-business. Binary Floor Control Protocol.
GLOSSARY Revised: March 30, 2012, A AES ASA Advanced Encryption Standard Cisco Adaptive Security Appliance B B2B BFCP bps Business-to-business Binary Floor Control Protocol Bits per second C CA CAPF CBWFQ
More informationCONTENTS. vii. Chapter 1 TCP/IP Overview 1. Chapter 2 Symmetric-Key Cryptography 33. Acknowledgements
CONTENTS Preface Acknowledgements xiii xvii Chapter 1 TCP/IP Overview 1 1.1 Some History 2 1.2 TCP/IP Protocol Architecture 4 1.2.1 Data-link Layer 4 1.2.2 Network Layer 5 1.2.2.1 Internet Protocol 5 IPv4
More informationFirewalls, Tunnels, and Network Intrusion Detection
Firewalls, Tunnels, and Network Intrusion Detection 1 Firewalls A firewall is an integrated collection of security measures designed to prevent unauthorized electronic access to a networked computer system.
More informationFireware-Essentials. Number: Fireware Essentials Passing Score: 800 Time Limit: 120 min File Version: 7.
Fireware-Essentials Number: Fireware Essentials Passing Score: 800 Time Limit: 120 min File Version: 7.0 http://www.gratisexam.com/ Fireware Essentials Fireware Essentials Exam Exam A QUESTION 1 Which
More informationOSI Transport Layer. objectives
LECTURE 5 OSI Transport Layer objectives 1. Roles of the Transport Layer 1. segmentation of data 2. error detection 3. Multiplexing of upper layer application using port numbers 2. The TCP protocol Communicating
More informationSpráva sítí I Bezpečnost a řízení přístupu
Správa sítí I Bezpečnost a řízení přístupu Mgr. Rudolf B. Blažek, Ph.D. Katedra počítačových systémů Fakulta informačních technologií České vysoké učení technické v Praze Rudolf Blažek 2010-2011 Moderní
More informationChapter 8. Network Security. Need for Security. An Introduction to Cryptography. Transposition Ciphers One-Time Pads
Cryptography p y Chapter 8 Network Security Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security An Introduction
More informationInformation Security CS 526
Information Security CS 526 Topic 14: Key Distribution & Agreement, Secure Communication Topic 14: Secure Communication 1 Readings for This Lecture On Wikipedia Needham-Schroeder protocol (only the symmetric
More informationAuthentication, Encryption, Transport, IP Version and VPN Routing
Authentication, Encryption, Transport, IP Version and VPN Routing VPN clients must authenticate themselves to the VPN server. A valid certificate is required for the client to verify the identity of the
More informationUnderstanding Cisco Cybersecurity Fundamentals
210-250 Understanding Cisco Cybersecurity Fundamentals NWExam.com SUCCESS GUIDE TO CISCO CERTIFICATION Exam Summary Syllabus Questions Table of Contents Introduction to 210-250 Exam on Understanding Cisco
More informationData Security and Privacy. Topic 14: Authentication and Key Establishment
Data Security and Privacy Topic 14: Authentication and Key Establishment 1 Announcements Mid-term Exam Tuesday March 6, during class 2 Need for Key Establishment Encrypt K (M) C = Encrypt K (M) M = Decrypt
More informationModern Internet architecture, technology & philosophy Advanced Internet Services Dept. of Computer Science Columbia University
1 Modern Internet architecture, technology & philosophy Advanced Internet Services Dept. of Computer Science Columbia University Henning Schulzrinne Spring 2015 02/09/2015 2 Key concepts The concept of
More informationComputing Parable. New Topic: Naming
Computing Parable The Cow Courtesy: S. Keshav Lecture 10, page 1 New Topic: Naming Names are used to share resources, uniquely identify entities and refer to locations Need to map from name to the entity
More informationCCNA Exploration Network Fundamentals. Chapter 03 Application Functionality and Protocols
CCNA Exploration Network Fundamentals Chapter 03 Application Functionality and Protocols Updated: 27/04/2008 1 3.1 Applications: The Interface Between Human and Networks Applications provide the means
More informationLecture-4. TCP/IP-Overview:
Lecture-4 TCP/IP-Overview: The history goes back to ARPANET a research network sponsored by DoD US Govt. It eventually connected hundreds of universities and govt installations, using leased telephone
More informationPersistent key, value storage
Persistent key, value storage In programs, often use hash tables - E.g., Buckets are an array of pointers, collision chaining For persistant data, minimize # disk accesses - Traversing linked lists is
More informationPart 1 : Getting Familiar with Linux. Hours. Part II : Administering Red Hat Enterprise Linux
Part 1 : Getting Familiar with Linux Chapter 1 : Getting started with Red Hat Enterprise Linux Chapter 2 Finding Your Way on the Command Line Hours Part II : Administering Red Hat Enterprise Linux Linux,
More informationChapter 10: Application Layer CCENT Routing and Switching Introduction to Networks v6.0
Chapter 10: Application Layer CCENT Routing and Switching Introduction to Networks v6.0 CCNET v6 10 Chapter 10 - Sections & Objectives 10.1 Application Layer Protocols Explain the operation of the application
More informationSYLLABUS. osmania university CHAPTER - 3 : MEDIUM ACCESS CONTROL (MAC) SUBLAYER Standards, Bluetooth, Bridges and Routers.
Contents i SYLLABUS osmania university UNIT - I CHAPTER - 1 : INTRODUCTION Data Communication, Network Topologies : LAN, WAN, MAN, Types : Bus, Star, Ring, Hybrid, Line Configurations, Reference Models
More information06/02/ Local & Metropolitan Area Networks 0. INTRODUCTION. 1. History and Future of TCP/IP ACOE322
1 Local & Metropolitan Area Networks ACOE322 Lecture 5 TCP/IP Protocol suite and IP addressing 1 0. INTRODUCTION We shall cover in this topic: 1. The relation of TCP/IP with internet and OSI model 2. Internet
More informationKerberos. Pehr Söderman Natsak08/DD2495 CSC KTH 2008
Kerberos Pehr Söderman Pehrs@kth.se Natsak08/DD2495 CSC KTH 2008 Project Athena Started 1983 at MIT 10 000 workstations 1000 servers Unified enviroment Any user, any workstation, any server, anywhere...
More informationNetworking Revision. TCP/IP Protocol Stack & OSI reference model. Basic Protocols. TCP/IP Model ANTHONY KAO NETWORKING FINAL EXAM SPRING 2014 REVISION
Networking Revision TCP/IP Protocol Stack & OSI reference model Basic Protocols TCP/IP Model 1 OSI (Open Systems Interconnection) Model main purpose to aid in clearer understanding of the functions and
More informationHow to Add Domains and DNS Records
Configure the Barracuda NextGen X-Series Firewall to be the authoritative DNS server for your domains or subdomains to take advantage of Split DNS or dead link detection. Step 1. Make the X-Series Firewall
More informationNetwork concepts introduction & wireshark
Network concepts introduction & wireshark W0RKSH0P @KirilsSolovjovs Why am I doing this? Many people attending hacker conferences are not in fact experts, but come here to learn and have fun Opportunity
More information(2½ hours) Total Marks: 75
(2½ hours) Total Marks: 75 N. B.: (1) All questions are compulsory. (2) Makesuitable assumptions wherever necessary and state the assumptions made. (3) Answers to the same question must be written together.
More informationSE 4C03 Winter Final Examination Answer Key. Instructor: William M. Farmer
SE 4C03 Winter 2003 Final Examination Answer Key Instructor: William M. Farmer (1) [2 pts.] Both the source and destination IP addresses are used to route IP datagrams. Is this statement true or false?
More informationjk0-022 Exam Questions Demo CompTIA Exam Questions jk0-022
CompTIA Exam Questions jk0-022 CompTIA Academic/E2C Security+ Certification Exam Voucher Only Version:Demo 1.An attacker used an undocumented and unknown application exploit to gain access to a file server.
More informationThe OSI Model. Open Systems Interconnection (OSI). Developed by the International Organization for Standardization (ISO).
Network Models The OSI Model Open Systems Interconnection (OSI). Developed by the International Organization for Standardization (ISO). Model for understanding and developing computer-to-computer communication
More informationTotal No. of Questions : 09 ] [ Total No.of Pages : 02
CS / IT 321 (CR) Total No. of Questions : 09 ] [ Total No.of Pages : 02 III/IV B. TECH. DEGREE EXAMINATIONS, OCT / NOV - 2015 Second Semester COMPUTER SCIENCE & ENGINEERING NETWK SECURITY Time : Three
More informationHow to Configure a Remote Management Tunnel for Barracuda NG Firewalls
How to Configure a Remote Management Tunnel for Barracuda NG Firewalls If the managed NG Firewall can not directly reach the NG Control Center it must connect via a remote management tunnel. The remote
More informationImplementing Secure Socket Layer
This module describes how to implement SSL. The Secure Socket Layer (SSL) protocol and Transport Layer Security (TLS) are application-level protocols that provide for secure communication between a client
More informationWashington State University CptS 455 Sample Final Exam (corrected 12/11/2011 to say open notes) A B C
Washington State University CptS 455 Sample Final Exam (corrected 12/11/2011 to say open notes) Your name: This exam consists 13 numbered problems on 6 pages printed front and back on 3 sheets. Please
More informationNetwork+ Guide to Networks, Seventh Edition Chapter 2, Solutions
Network+ Guide to Networks, Seventh Edition Chapter 2, Solutions [C HD] Applying Concepts: Configure Address Translation Using NAT At the end of this chapter, you ll create your own NAT translation table
More informationSecurity in Distributed Systems. Network Security
Security in Distributed Systems Introduction Cryptography Authentication Key exchange Readings: Tannenbaum, chapter 8 Ross/Kurose, Ch 7 (available online) Computer Science Lecture 22, page 1 Network Security
More informationUNIT 5 MANAGING COMPUTER NETWORKS LEVEL 3 NETWORK PROTOCOLS
UNIT 5 MANAGING COMPUTER NETWORKS LEVEL 3 NETWORK PROTOCOLS NETWORK PROTOCOLS A network manager needs to be aware of a number of different protocols, especially those that exist in the Application Layer
More informationCluster Computing Spring 2004 Paul A. Farrell
Configuring & Tuning Cluster Networks Node connectivity Node visibility Networking Services Security Performance Enhancement Internet Protocol Stack and Parameters NIC/OS Driver Maximum Amount of Data
More informationSUBJECT: DATA COMMUNICATION AND NETWORK SEMESTER: V SEMESTER COURSE: BCA SUBJECT TEACHER: Dr.K.Chitra Assistant Professor, Department of Computer
SUBJECT: DATA COMMUNICATION AND NETWORK SEMESTER: V SEMESTER COURSE: BCA SUBJECT TEACHER: Dr.K.Chitra Assistant Professor, Department of Computer Science Chapter - 2 Switching and Network Architecture
More informationAuthentication Part IV NOTE: Part IV includes all of Part III!
Authentication Part IV NOTE: Part IV includes all of Part III! ECE 3894 Hardware-Oriented Security and Trust Spring 2018 Assoc. Prof. Vincent John Mooney III Georgia Institute of Technology NOTE: THE FOLLOWING
More informationCN1047 INTRODUCTION TO COMPUTER NETWORKING CHAPTER 6 OSI MODEL TRANSPORT LAYER
CN1047 INTRODUCTION TO COMPUTER NETWORKING CHAPTER 6 OSI MODEL TRANSPORT LAYER Transport Layer The Transport layer ensures the reliable arrival of messages and provides error checking mechanisms and data
More informationCryptography - SSH. Network Security Workshop May 2017 Phnom Penh, Cambodia
Cryptography - SSH Network Security Workshop 29-31 May 2017 Phnom Penh, Cambodia What is Safely Authentication I know who I am talking with Our communication is Encrypted Telnet Servers Terminal Routers
More informationToday: Naming. Example: File Names
Today: Naming Names are used to share resources, uniquely identify entities and refer to locations Need to map from name to the entity it refers to E.g., Browser access to www.cnn.com Use name resolution
More informationStrategic Infrastructure Security
Strategic Infrastructure Security Course Number: SCPSIS Length: Certification Exam There are no exams currently associated with this course. Course Overview This course picks up right where Tactical Perimeter
More informationNetworks and Communications MS216 - Course Outline -
Networks and Communications MS216 - Course Outline - Objective Lecturer Times Overall Learning Outcomes Format Programme(s) The objective of this course is to develop in students an understanding of the
More informationKerberos and Active Directory symmetric cryptography in practice COSC412
Kerberos and Active Directory symmetric cryptography in practice COSC412 Learning objectives Understand the function of Kerberos Explain how symmetric cryptography supports the operation of Kerberos Summarise
More informationHP Instant Support Enterprise Edition (ISEE) Security overview
HP Instant Support Enterprise Edition (ISEE) Security overview Advanced Configuration A.03.50 Mike Brandon Interex 03 / 30, 2004 2003 Hewlett-Packard Development Company, L.P. The information contained
More informationINSTRUCTIONS TO CANDIDATES
NATIONAL UNIVERSITY OF SINGAPORE SCHOOL OF COMPUTING FINAL EXAMINATION FOR Semester 2 AY2012/2013 Introduction to Computer Networks April 2013 Time Allowed 2 hours INSTRUCTIONS TO CANDIDATES 1. This exam
More informationCryptography - SSH. Network Security Workshop. 3-5 October 2017 Port Moresby, Papua New Guinea
Cryptography - SSH Network Security Workshop 3-5 October 2017 Port Moresby, Papua New Guinea 1 What is Secure Authentication I know who I am talking to Our communication is Encrypted Telnet Servers Terminal
More informationSSL/TLS & 3D Secure. CS 470 Introduction to Applied Cryptography. Ali Aydın Selçuk. CS470, A.A.Selçuk SSL/TLS & 3DSec 1
SSL/TLS & 3D Secure CS 470 Introduction to Applied Cryptography Ali Aydın Selçuk CS470, A.A.Selçuk SSL/TLS & 3DSec 1 SSLv2 Brief History of SSL/TLS Released in 1995 with Netscape 1.1 Key generation algorithm
More informationCPSC 467: Cryptography and Computer Security
CPSC 467: Cryptography and Computer Security Michael J. Fischer Lecture 24a December 2, 2013 CPSC 467, Lecture 24a 1/20 Secure Shell (SSH) Transport Layer Security (TLS) Digital Rights Management and Trusted
More informationSecurity+ Guide to Network Security Fundamentals, Third Edition. Chapter 11 Basic Cryptography
Security+ Guide to Network Security Fundamentals, Third Edition Chapter 11 Basic Cryptography Objectives Define cryptography Describe hashing List the basic symmetric cryptographic algorithms 2 Objectives
More informationLPI202 - LPIC-2 Exam Prep (Course 2) (LPI202) HL966S
Course data sheet LPI202 - LPIC-2 Exam Prep (Course 2) (LPI202) HL966S Prerequisites Supported distributions Course data sheet Page 1 Detailed course outline Module 5: Maintaining a Web Server Module 6:
More informationEI 338: Computer Systems Engineering (Operating Systems & Computer Architecture)
EI 338: Computer Systems Engineering (Operating Systems & Computer Architecture) Dept. of Computer Science & Engineering Chentao Wu wuct@cs.sjtu.edu.cn Download lectures ftp://public.sjtu.edu.cn User:
More informationOperating Systems. Week 13 Recitation: Exam 3 Preview Review of Exam 3, Spring Paul Krzyzanowski. Rutgers University.
Operating Systems Week 13 Recitation: Exam 3 Preview Review of Exam 3, Spring 2014 Paul Krzyzanowski Rutgers University Spring 2015 April 22, 2015 2015 Paul Krzyzanowski 1 Question 1 A weakness of using
More informationOn the Internet, nobody knows you re a dog.
On the Internet, nobody knows you re a dog. THREATS TO DISTRIBUTED APPLICATIONS 1 Jane Q. Public Big Bank client s How do I know I am connecting to my bank? server s Maybe an attacker...... sends you phishing
More informationConfiguring Firewalls for SiteProtector Traffic
IBM Proventia Management SiteProtector System Configuring Firewalls for SiteProtector Traffic Version 2.0, Service Pack 7, July 29, 2008 Overview SiteProtector cannot function properly if firewalls prevent
More informationCS 416: Operating Systems Design April 22, 2015
Question 1 A weakness of using NAND flash memory for use as a file system is: (a) Stored data wears out over time, requiring periodic refreshing. Operating Systems Week 13 Recitation: Exam 3 Preview Review
More informationInformation Network I: The Application Layer. Doudou Fall Internet Engineering Laboratory Nara Institute of Science and Technique
Information Network I: The Application Layer Doudou Fall Internet Engineering Laboratory Nara Institute of Science and Technique Outline Domain Name System World Wide Web and HTTP Content Delivery Networks
More informationNetwork Address Translation (NAT) Contents. Firewalls. NATs and Firewalls. NATs. What is NAT. Port Ranges. NAT Example
Contents Network Address Translation (NAT) 13.10.2008 Prof. Sasu Tarkoma Overview Background Basic Network Address Translation Solutions STUN TURN ICE Summary What is NAT Expand IP address space by deploying
More informationApplication Layer: OSI and TCP/IP Models
Application Layer Application Layer: OSI and TCP/IP Models The communication process between two communicating nodes is actually a communication process between two applications on these devices. Service
More informationPublic Key Infrastructure. What can it do for you?
Public Key Infrastructure What can it do for you? What is PKI? Centrally-managed cryptography, for: Encryption Authentication Automatic negotiation Native support in most modern Operating Systems Allows
More informationOverview. SSL Cryptography Overview CHAPTER 1
CHAPTER 1 Secure Sockets Layer (SSL) is an application-level protocol that provides encryption technology for the Internet. SSL ensures the secure transmission of data between a client and a server through
More informationForeword by Katie Moussouris... Acknowledgments... xvii. Introduction...xix. Chapter 1: The Basics of Networking... 1
Brief Contents Foreword by Katie Moussouris.... xv Acknowledgments... xvii Introduction...xix Chapter 1: The Basics of Networking... 1 Chapter 2: Capturing Application Traffic... 11 Chapter 3: Network
More informationCoding & Information Theory Lab.
통합인증시스템설계및구현 연세대학교전기 전자공학과정연식, 송홍엽 Coding & Information Theory Lab. Introduction Previous Works Contents Design and Implementation of Public-Key Infrastructure Design and Implementation of Single Sign-On
More information10/1/2015. Authentication. Outline. Authentication. Authentication Mechanisms. Authentication Mechanisms. Authentication Mechanisms
Authentication IT443 Network Security Administration Instructor: Bo Sheng Authentication Mechanisms Key Distribution Center and Certificate Authorities Session Key 1 2 Authentication Authentication is
More informationCSC 774 Network Security
CSC 774 Network Security Topic 2. Review of Cryptographic Techniques CSC 774 Dr. Peng Ning 1 Outline Encryption/Decryption Digital signatures Hash functions Pseudo random functions Key exchange/agreement/distribution
More informationHP Load Balancing Module
HP Load Balancing Module Load Balancing Configuration Guide Part number: 5998-4218 Software version: Feature 3221 Document version: 6PW100-20130326 Legal and notice information Copyright 2013 Hewlett-Packard
More information