PACIFIC COMP 025 - Networking (25 pages)

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Networking



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Networking

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Lecture Notes


Pages:
25
School:
University of the Pacific
Course:
Comp 025 - Computers And Info. Processing
Computers And Info. Processing Documents

Unformatted text preview:

Lecture Networking What is a Network Two or More Devices Exchanging Information Networks Require 1 A physical connection medium 2 A language software protocol 3 Devices to facilitate 1 Physical Connection Telephone Network Lines Cat 3 Cat 5 Cat 5e Cat 6 T1 Cables Fiber Optic Coaxial Wireless air a physical connection is also called a medium Protocol Definition When computers communicate with each other there needs to be a common set of rules and instructions that each computer follows An agreed upon format for transmitting data between two devices A specific set of communication rules is called a protocol 2 Networking Protocols Software PPP Point to Point Protocol dial up connections Ethernet used for local area networks LANs 802 11 b g n ac short long range wireless 30 ft Bluetooth personal range wireless Wi Max Xohm Sprint Nextel Intel Comcast Time Warner 802 16 Enables usage across greater distances up to 31 mi 30 40 Mbps Distance vs Speed 2 Networking Protocols cont TCP IP Part of O S Layered or suite of protocols for all commercial and private networks TCP IP is the glue that holds the Internet and web together TCP IP for Dummies Protocols you use everyday Protocols within TCP IP DNS Resolves www address to IP address Domain Name system FTP Homework 4 File Transfers File Transfer Protocol HTTP Rules for all web pages Hypertext Transfer Protocol IMAP Rules for E Mail Internet mail access protocol IRC Internet Relay Chat AIM MySpace POP3 Incoming Email Post Office Protocol SMTP Outgoing email Simple Mail Transfer Protocol Telnet Contacting computers remotely BitTorrent P2P sharing Limewire Kaaza List of Protocols 3 Networking Devices Hubs and Switches Routers Modems Radios Wireless NICs Network Interface Card NIU Network Interface Unit 3 Networking Devices cont Hub This is the cheapest way to connect computers on a network It s basically a box with several ports on it one for each computer on the network The hub helps transfer information from one computer to the



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