Transcript CS335 Networking & Network Administration

CS335
Networking &
Network Administration
Tuesday April 27, 2010
Summary
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Basic networking
Hardware in LAN and WAN’s
Addressing and routing
Internetworking
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No single networking technology is best for
all needs
Universal service
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Allows arbitrary pairs of computers to
communicate
Incompatibilities among network hardware and
physical addressing prevent connecting bridged
networks with arbitrary technologies
Internetworking provides universal service
among heterogeneous networks
Physical network connections
with routers
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Routers have a processor and memory
Have separate I/O interfaces for each
network to which it connects
Internet architecture
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One router could connect these networks
Routers can have multiple interfaces
Redundancy improves reliability
Achieving universal service
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Goal of internetworking is universal service
across heterogeneous networks
Internet protocols make this possible
It is a virtual network made up of many small
networks
The communication system is an abstraction
TCP/IP internet protocols
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Compare this to 7 layer OSI model
IP Internet Protocol Addresses
Dotted decimal
Address classes
Special IP Addresses
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Reserved, not assigned
Example
CIDR (Classless Inter-domain
Routing)
Domain Registry
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http://www.internic.net
http://www.arin.net
http://www.networksolutions.com