Chapter Six Topics Network Types Network Types Network Components

Chapter Six Topics Network Types Network Types Network Components www.phwiki.com

Chapter Six Topics Network Types Network Types Network Components

Young, Jene’, Meteorologist and Reporter has reference to this Academic Journal, PHwiki organized this Journal Chapter Six IS Network in addition to Telecommunications Risks Topics Network in addition to Telecommunication Technologies Risks to IT Network in addition to Telecommunication Systems IT Network in addition to Telecommunication Security Auditing Network Security Network Types By Scale Local Area Network (LAN) Backbone Networks (BN) as long as linking together organizational LANs at various locations. Metropolitan Area Network (MAN) connects LANs in addition to BNs across different locations (usually leased lines) Wide Area Network (WAN) By Ownership Internet, intranet, extranet Virtual private networks (VPN)

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Network Types By Topology Star-shaped – centralized Ring – decentralized Bus – decentralized Mesh By Distribution of Functionality Client Server, Thin Client, Fat Client Network Components Computers in addition to terminals Network Operating System Telecommunications processors (network interface cards in addition to modems) Telecommunications channels – physical in addition to wireless (media) Devices (Routers, switching, hubs, etc.) Network Infrastructure Clients/Servers (Users in addition to Applications) Network Protocols in addition to Software Network in addition to telecommunications software application software (web browsers, e-mail software, etc.), network OS, networks management software, middleware

Multi-layer Network Models Network models – st in addition to ard architecture that allows different HW in addition to SW to communicate across networks Open Systems Interconnection Model (7 layer) Created by International St in addition to ards Organization (ISO) in 1984 Internet Model (5 layer) Created by DARPA originally in early 70’s Based on Transmission Control Protocol/ Internet Protocol (TCP/IP) suite Combines the “top” three layers of the OSI model into a single layer. 5-Layer Internet Model Application Layer set of utilities used by application programs Transport Layer deals with end-to-end issues such as segmenting the message as long as network transport, in addition to maintaining the logical connections between sender in addition to receiver Network Layer responsible as long as making routing decisions Data Link Layer deals with message delineation, error control in addition to network medium access control Physical Layer defines how individual bits are as long as matted to be transmitted through the network Application Software Computer Hardware System Software 1 – Data Communication St in addition to ards

Message Transmission Example 5 – Message Moving Through Layers IS Network in addition to Telecommunications Risks Social Engineering, Software Vulnerabilities (Unauthorized Access) Physical Infrastructure Threats – the elements, natural disasters, power supply, intentional human attacks (disaster) Programmed Threats – viruses, worms, Trojan horses, hoaxes, blended threats (destruction) Denial of Service Attacks (disruption)

IS Network in addition to Telecommunications Security Network security administration Authentication in addition to Access Control Encryption – secret key in addition to public key Firewalls – packet filtering in addition to stateful inspection Intrusion Detection Systems Penetration Testing – war dialing, port scanning, sniffers, password crackers Internal, Perimeter, in addition to External Networks Auditing Network Security Risk assessment in addition to best practices Benchmark tools IT audit programs as long as network security

Young, Jene' News 5 at 5 PM Sunday - WKRG-TV Meteorologist and Reporter www.phwiki.com

Young, Jene’ Meteorologist and Reporter

Young, Jene’ is from United States and they belong to News 5 at 5 PM Sunday – WKRG-TV and they are from  Mobile, United States got related to this Particular Journal. and Young, Jene’ deal with the subjects like Environment; Meteorology

Journal Ratings by Universit Blaise Pascal (Clermont-Ferrand II)

This Particular Journal got reviewed and rated by Universit Blaise Pascal (Clermont-Ferrand II) and short form of this particular Institution is FR and gave this Journal an Excellent Rating.