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IST233 book

chapter 1

network system that permits different applications on different host to work together
network application app's that are based on networking-ie Obama's email app on Black berry
Web 2.0 users provide content-Wikipedia
Social Media App's designed to facilitate group relationships.-facebook
Host any device(computer, printer, toaster) connected to a network
network core central part of network
access links what users use to connect to network, may be copper wire, fiber optic cables or radio transmissions
Dumb terminal network that could only connect with central host and show ntwks on the screen. not interactive
Server/Client processing server program, on server host, provides services to a client program, on a client host, very interactive
request-response cycle online shopping- when client server sends a request of server host and receives a response from a webserver, not the direct host
P2P peer to peer networking where client and host work directly with host
cloud computing servers for internal company are being managed by outside company
bps bits per second measures speed of network
BPS Big B= bytes per second
kbps kilo 1000
Mbps Mega 1000 kbps
Gbps Giga 1000 Mbps
Tbps Tera 1000 giga
Dial up Way to connect terminals and host over llong distances, circuit is terminated after you hang up
circuit switching gives you a reservered opacity between you and other party; circuit remains even after done connecting- no matter how many people on other lines service will not be bad because you have a reserved amount of data already
bursty connection/data transmission during dail up durst of good and followed by long silence when ple are on the phone
leased line circuit relays mainly on dial up and if phone is being used then leases time on circuit switching (which is 24 hour line available line)
analog signal rises and flows in intensity, like human voice
binary transaction only 1 states in this type of connection 1 and 0- type of digital transmission
modems translate digital to analog sytems
modulation digital to analog
demod talk talk talk to 011 011
amplitude modulation one represented by a LOUD signal LLSL =1101
Clock cycle to differenate amplitude modulation i.e. two soft sounds in a row
Packet Switching saves money by multiplexing(mixing in data with phone convos) over expensive circuits
forwarding decision packet switch decides to send the message along based on it's address
physical links in packet switch network, these are between host, switchs and there routers
data links name for switches path that packets take
IMPS intereface message processors, packet switch network in ARPA net, fragmented network
NCP Network Control Program, for IMPS's in ARPA net, to deliver and rebuild packets
NWG networking working group standarized IMP connections,
RFCs Request for Comments made by NWG, i.e. need for sender and receiver address
IETF internet Engineering Task Force the new NWG
PRnet and SATnet using packet transmiting through radio packets and sateilight packets
routers/gateways Kahn and Cerf made these. ways to connect different networks into a router
internet layers higher layer of networking over different kinds of network technology
dotted decimal notation human reading of ipv address like 123.235.343.92
frames packets at the data link layer
packects packets on the internet(2 layer with ipv4 passcodes)
switches the packet switch that frame goes through in a network
routers the packet switch that a packet goes through in the internet "route"
transport layer 4th layer in internetworking right above internet only cares about what happens from host server to destination server
IP internet protcool these standards deal with your IP address purpose: to move packets around internet
TCP transport control protocol with high functionality, this fragments application message
UDP/Datagrams User Datagram Protocol- not high functionality, no fragments or error correction VoIP(voice over techonology uses this)
TCP/IP family of standards including IP TCP and UDP
What 3 networks first tried internet PRNET-stany, ARPANET AND SATNET-bayshore
AUP Acceptable Use Policy, NSNET bought this regulatory company to keep internet as strictly research, no bullying, ads
NAPs Networking Access Points different routers that allow ISP to exchange packets
supervisory standards now TCP/IP standards are more geared towards user application like Web and email standards
static IP address unchanging ip addresses that servers must have, so users can always find them.
DHCP dynamic Host Configuration Protcol gives users/Client PC ip address to surf the web
Dynamic IP address changing IP address, used by client PC's like me ;)
DNS Given by NIC (network info center) this is the human friendly name for ipaddress. like gap.com is 234.543.234.56
LANS local area network conststite inside a corporation; cheaper and can choose techolongy self inplementation speed: 100 Mbps to 10 Gbps
WANs Wide area networks, connects different networking sites within and organization speed: 256 kbps to 50 Mbps- Gov regulates this and more expensive
Carries/Right of way gov issues to WAN permission where to lay wires
wireless access router in home connects networks(i.e. mobile and regular) has an eternet switch
NAT (inhome) network Address translation; translate internal versus single IP add. given to household
Created by: 1409445916