Spring 2011 CSCI 27

Computer Networking Course Overview

Defined networks and stand-alone computers

Described network advantages◦ Relative to stand-alone computer

Discussed peer-to-peer networks◦ Described traditional peer-to-peer networks

Discussed client/server networks Defined and compared LANs, MANs and

WANs

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Reviewed common client/server network elements

Described various network services Reviewed the networking profession Presented overview of certifications

available Skill sets required for networking positions

and projects Described advantages of joining

professional associations

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Standards and standard organizations ISO’s OSI (Open Systems Interconnection)

model◦ Seven layers

IEEE’s Project 802 Significant IEEE 802 standards

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Transmission methods◦ Analog or digital

Data modulation Multiplexing Basic data transmission concepts

◦ Full duplexing, attenuation, latency, noise Transmission flaws

◦ Noise, attenuation, latency

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Media characteristics◦ Throughput, cost, size and scalability, connectors,

noise immunity Media◦ Coaxial, Twisted pair, Fiber-optic

DTE and DCE connector cables◦ DB-9 and DB-25

Structured cabling◦ TIA/EIA joint 568 Commercial Building Wiring

Standard◦ Components

Best practices

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TCP/IP suite◦ Core protocol and subprotocol introduction

IPv4 addressing◦ Binary and dotted decimal notation◦ Subnetting

Assigning addresses: BOOTP, DHCP, APIPA IPv6 addressing Sockets and Ports Domain names, Host files, DHCP, DNS Other application layer protocols

Physical topology◦ Basic network physical layout

Logical topology◦ Signal transmission

Network backbones◦ Network foundation

Switching◦ Manages packet filtering, forwarding

Ethernet◦ Cabling specifications, data frames, PoE

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NIC interface cards◦ Types, installation, testing, IRQ use, Base I/O port use,

firmware settings, selection Repeater and hubs Bridges Switches

◦ Installation, switching methods, VLANs and trunking, STP (Spanning Tree Protocol), Content and Multilayer Switches

Router characteristics and functions, protocols Gateways and other multifunction devices

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WAN Topologies PSTN and dial-up considerations High speed digital data transmission

◦ Physical layer: ISDN, T-carriers, DSL, SONET◦ Data Link layer: X.25, frame relay, ATM◦ Physical and Data link: broadband

Remote connectivity Remote virtual computing VPNs

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WLAN Architecture characteristics Popular WLAN Physical, Data Link layer

standards Wireless signal exchange Small WLAN considerations Larger, enterprise-wide WAN formation Installing, configuring access points, clients WLAN Pitfalls MANs, WANs wireless transmission Satellite Internet Access characteristics

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Characteristics common to all NOS◦ Systems and servers, client support, identifying

and organizing network elements, sharing applications and printers, managing system resources

Windows Server 2008 network structure Unix and Linux concepts and features

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This chapter covered:◦ Designing TCP/IP-Based Networks◦ Subnetting◦ CIDR◦ Internet gateways◦ Address translation◦ TCP mail services◦ Utility commands

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Basic Terminology VoIP

◦ Analog phones, IP phones, softphones Video over IP

◦ Streaming Video, IPTV, videoconferencing Signaling protocols Session control protocols Transport protocols QoS (Quality of Service) Assurance

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Risks and auditing Security policy Network security risk points Routers Firewalls Encryption Authentication Wireless access

Methodical, logical troubleshooting methodology◦ Key to solving network problems

Troubleshooting tools◦ Tone generator and tone locator◦ Multimeters◦ Basic cable continuity testers◦ Cable performance tester◦ Voltage event recorder◦ Butt set◦ Network monitors and protocol analyzers◦ Wireless network testing tools

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System integrity and availability Malware issues

◦ Types, characteristics, protection mechanisms Fault tolerance issues and resolutions

◦ Physical environment, power techniques◦ Topology and connectivity techniques◦ Server and storage techniques

Data backup◦ Media, strategy

Disaster recovery concerns and techniques

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Network management ◦ Assessing, monitoring, and maintaining network

devices and connections Importance of network documentation and

policies Network management applications System logs and event logs, traffic shaping,

caching, asset management system Upgrade types and considerations

◦ Software, hardware