Network +
Tom McLaughlin
b-admin, mcse, mous, a+, net+ (mct, linux)
tom@tomax7.com
http://www.tomax7.com
1
Networking Benefits
Networking Enables:
Information
Sharing
Centralized
Administration
and Support
Hardware and Software Sharing
2
Roles of Computers in a Network
Mail Server
Database Server
Fax Server
Database
File and Print Server
Directory Services
Server
Client Computer
3
Types of Networks
Peer-to-Peer
Client-Server
4
Scope of Networks
Local Area
Network
Wide Area Network
5
Bus Topology
Segment
Terminator
Terminator
http://homepages.uel.ac.uk/u0116771/bus_topology.htm
6
Star Topology
Hub
http://www.computerhope.com/jargon/s/startopo.htm
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Ring Topology
http://www.computerhope.com/jargon/r/ringtopo.htm
8
Mesh Topology
http://www.computerhope.com/jargon/m/mesh.htm
9
Hybrid Topologies
Star-Bus
Bus
Star-Ring
http://en.wikipedia.org/wiki/Network_topology#Hybrids
10
Token Ring
Physical
Ring
MSAU
Characteristics
Logical
Ring
Description
Access Method
Token passing
Transfer Speed
4 to 16 Mbps for all cable types
http://www.webopedia.com/TERM/T/token_ring_network.html
11
Network Cables
Types of Cables
Twisted-Pair
10BaseT
Unshielded (UTP)
Shielded (STP)
Coaxial
10Base2, 10Base5
ThinNet
ThickNet
Fiber-Optics
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Wireless Communication
DevicesWireless Communication Devices
Infrared Transmission
Narrowband Radio Transmission
http://searchnetworking.techtarget.com/definition/infrared-transmission
13
Routers
Router
Router
http://www.computerhope.com/jargon/r/router.htm
14
Gateways
Ethernet
Gateway
Token Ring
http://en.wikipedia.org/wiki/Gateway
15
Infrared Data Association (IrDA)
Wireless Communication by Using IrDA
Windows
Client
Laptop
Mouse
16
IP Addresses
192.168.2.100
IP
Address
192.168.3.100
192.168.1.100
192.168.1.0
192.168.2.0
192.168.3.0
Network ID
192.168.1.100
192.168.2.101
Host ID
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The Internet
Server
Internet
Text, Audio, Video,
and Graphics Data
Connection Using
TCP/IP Protocol
Client
http://en.wikipedia.org/wiki/Internet
18
Internet Services
 Electronic
Mail (e-mail)
 World Wide Web (WWW)
 Chat
 Internet News
 File Transfer Protocol (FTP)
 Telnet
Internet
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Uniform Resource Locator (URL)
 URL
(http://example.microsoft.com/tutorial/
default.html)
– Protocol used (http://)
– DNS address (example.microsoft.com)
– Path on the server (/tutorial/default.html)
http://example.microsoft.com/tutorial/default.html
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Firewalls
Authorized
User
LAN
Internet
LAN
Firewall
LAN
Unauthorized
User
http://en.wikipedia.org/wiki/Firewall_%28computing%29
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