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Virtual Infrastructure. C27_B259,  MSCS building, UNE, Armidale, NSW, Australia on Friday, 25th May 2007 from 12 to 1pm.

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virtual infrastructure

Virtual Infrastructure

C27_B259,  MSCS building, UNE, Armidale, NSW, Australia on Friday, 25th May 2007 from 12 to 1pm.

by Dr. Charles R. WatsonSchool of Maths, Stats and Computer ScienceUniversity of New England, Armidale NSW 2351URL: http://mcs.une.edu.au/~cwatson7/I/VirtualInfrastructure.ppt

overview
Overview
  • Digital Communications Technology
  • Voice over IP
  • Integrity and Availability
  • Security
  • Discussion: cost-neutral improvement of our virtual infrastructure

Virtual Infrastructure

transmission media
Transmission Media

Virtual Infrastructure

wireless lan architecture
Wireless LAN Architecture

Virtual Infrastructure

ethernet csma cd
Ethernet: CSMA/CD

Carrier Sense Multiple Access with Collision Detection

Virtual Infrastructure

protocol analyzers
Protocol Analyzers

Traffic displayed by protocol type

Virtual Infrastructure

wide area network
Wide Area Network

Virtual Infrastructure

gateways
Gateways

Virtual Infrastructure

client server communication
Client/Server Communication

Virtual Infrastructure

satellite internet access
Satellite Internet Access

Virtual Infrastructure

satellite internet access continued
Satellite Internet Access (continued)

Dial return satellite Internet service

Virtual Infrastructure

wan technologies compared
WAN Technologies Compared

Virtual Infrastructure

voice over ip
Voice-over-IP
  • Cisco AS5300 is the core AARNet Gateway.
  • Voice card for Cisco 3660
  • Skype is a peer-to-peerInternet telephonynetwork founded by the Niklas Zennström.
    • It competes against existing open VoIP protocols such as SIP, IAX, and H.323.
    • Rapid growth in free and paid services.
    • Features include
      • free voice and video conferencing,
      • its ability to use peer to peer (decentralized) technology to overcome common firewall and NAT (Network address translation) problems

Virtual Infrastructure

voip continued
VoIP (continued)

Accessing a VoIP network from traditional telephones

Virtual Infrastructure

voip continued1
VoIP (continued)

Accessing a VoIP network from IP phones

Virtual Infrastructure

internet group management protocol
Internet Group Management Protocol
  • Network layer protocol that manages multicasting allowing one node to send data to defined group of nodes
  • Routers use IGMP to determine which nodes belong to multicast group and to transmit data to all nodes in that group
  • IGMP can be used for online video and gaming, and allows more efficient use of resources
  • UDP - User (Unreliable) Datagram Protocol is faster and more efficient than TCP for lightweight or time-sensitive purposes, e.g. IPTV, audio-visual streaming media

Virtual Infrastructure

real world example
Real world example

http://en.wikipedia.org/wiki/Streaming_media

  • One hour of video encoded at 300 kbit/s (this is a typical broadband video for 2005 and it's usually encoded in a 320×240 pixels window size) will be:
    • (3,600 s · 300 kbit/s) / 8,388.608 = 128.7 MiB of storage
  • If the file is stored on a server for on-demand streaming. If this stream is viewed by 1,000 people using a Unicast protocol, you would need
  • 300 kbit/s · 1,000 = 300,000 kbit/s = 300 Mbit/s of bandwidth
  • This is equivalent to 125.73 GiB per hour. Of course, using a Multicast protocol the server sends out only a single stream that is common to all users. Hence, such a stream would only use 300 kbit/s of bandwidth.

Virtual Infrastructure

integrity and availability
Integrity and Availability
  • Integrity refers to the soundness of network files, systems, and connections
  • Fault tolerance is a system’s capacity to continue performing despite unexpected hardware or software malfunction
  • A UPS is a battery power source that prevents undesired features of the power source from harming the device or interrupting its services
  • Backup rotation provides excellent data reliability without overtaxing network or requiring much intervention
  • Disaster recovery is the process of restoring critical functionality and data after an enterprise-wide outage
  • Critical servers often contain redundant NICs, processors, and/or hard disks to provide better fault tolerance
  • Server mirroring involves utilizing a second, identical server to duplicate the transactions and data storage of one server
  • Clustering links multiple servers together to act as a single server

Virtual Infrastructure

redundant array of independent or inexpensive disks
Redundant Array of Independent (or Inexpensive) Disks

RAID Level 5—disk striping with distributed parity

Virtual Infrastructure

fully redundant t1 connectivity
Fully redundant T1 connectivity

Redundancy provides load balancing and fault tolerance.

Virtual Infrastructure

security
Security
  • Choosing secure passwords is one of the easiest and least expensive ways to guard against unauthorized access.
  • A security policy identifies an organization’s security goals, risks, levels of authority, designated security coordinator and team members, responsibilities for each team member and each employee, and strategies for addressing security breaches.
  • A firewall is a specialized device that selectively filters or blocks traffic between networks.
  • A proxy service is a software application on a network host that acts as an intermediary between the external and internal networks, screening all incoming and outgoing traffic.

Virtual Infrastructure

physical security
Physical Security

Badge access security system

Virtual Infrastructure

authentication
Authentication

A RADIUS server providing centralized authentication

Virtual Infrastructure

domains organizational units
Domains = Organizational Units

Virtual Infrastructure

trust relationships
Trust Relationships

Virtual Infrastructure

trust relationships continued
Trust Relationships (continued)

Explicit one-way trust between domains in different trees

Virtual Infrastructure

public key encryption
Public Key Encryption

Virtual Infrastructure

proxy servers
Proxy Servers

A proxy server used on a WAN

Virtual Infrastructure

network address translation
Network Address Translation

Virtual Infrastructure

deep packet inspection
Deep packet inspection

http://en.wikipedia.org/wiki/Deep_packet_inspection

  • Deep packet inspection (DPI) is a form of computer networkpacket filtering that examines the data part of a through-passing packet, searching for non-protocol compliance or predefined criteria to decide if the packet can pass. This is in contrast to shallow packet inspection (usually called just packet inspection) which just checks the header portion of a packet.
  • DPI devices have the ability to look at Layer 2 through Layer 7 of the OSI model. This includes headers and data protocol structures. The DPI will identify and classify the traffic based on a signature database
  • A classified packet can be redirected, marked/tagged (see QoS), blocked, rate limited, and of course, reported to a reporting agent in the network.
  • Many DPI devices identify flows rather than a packet by packet analysis.
  • DPI allows phone and cable companies to "readily know the packets of information you are receiving online--from e-mail, to websites, to sharing of music, video and software downloads"[1] .
  • DPI is also increasingly being used in security devices to analyze flows, compare them against policy, and then treat the traffic appropriately (i.e., block, allow, rate limit, tag for priority, mirror to another device for more analysis or reporting).

Virtual Infrastructure

project management
Project Management

Virtual Infrastructure

ncris
NCRIS

National Collaborative Research Infrastructure Strategy (NCRIS) projects

http://www.ncris.dest.gov.au/

    • 5.16 Platforms for collaboration
    • 5.16.1 Data access and discovery, storage and management
    • 5.16.2 Grid enabled technologies and infrastructure
    • 5.16.3 Technical expertise
    • 5.16.4 High performance computing
    • 5.16.5 High capacity communications networks

"Platforms for Collaboration" will develop our strengths in other NCRIS categories:

  • Evolving Bio-molecular Platforms and Informatics
  • Integrated Biological Systems
  • Biotechnology Products
  • Networked Bio-security Framework
  • Structure and Evolution of the Australian Continent
  • Terrestrial Ecosystem Research Network
  • Population health and clinical data linkage

Virtual Infrastructure

discussion
Discussion

Future virtual infrastructure

  • Email spam
  • voice-over-IP
  • multicasting
  • firewall configuration
  • federated identity management
  • intellectual property protection
  • cost-neutral deployment
  • rapid obsolescence

Virtual Infrastructure