CPSC 441 STUDY GUIDE
Internet - Answers - networking infastructure that provies services to distrubuted
applications. network of networks
Applicaiton layer - Answers - user to user deals with messages i.e emials ,web objects
Transport Layer - Answers - end to end deals with sending data from segments to
correct socekt i.e multi/demultiplexic
Network Layer - Answers - host to host delivery of datagrams. Classic protocol is
internet protocol
Datalink layer - Answers - hop by hop delivery of frams i.e IP
Physical Layer - Answers - transmists bits through physical media
network protocol - Answers - hardware software message exchange
hosts - Answers - end systems running networked apps
packet switches - Answers - forward packets(chunks of data)
communication links - Answers - fiber,copper, satellite wires
badnwith - Answers - transmission rate
networks - Answers - collection od devices routers links managed by an organization
Protocols - Answers - controls ending/recieving, i.e http
internet as nuts and bolts view - Answers - a network of networks, protocols everywhere
internet as service view - Answers - infastructure that provides service to applocations,
provides programming interface to distributed applocations
LAN - Answers - local area network. Uses physical ethernet cables to connect servers
in small area
RFC - Answers - (Request for Comments) Documents are how standards and protocols
are defined and published for all to see on the IETF website.
,IETF - Answers - Internet Engineering Task Force - develops and promotes voluntary
Internet standards and protocols, in particular the standards that comprise the Internet
protocol suite (TCP/IP).
Network edges - Answers - end systems/hosts
Acess Networks, physical media - Answers - wired, wireless communication links
Network core - Answers - interconnected routers, network of networks
access network - Answers - network physically connection and end system to an edge
router
How to connect end system to edge router - Answers - residential access nets,
institutional acess netowrks, mobile access networks
mobile network access - Answers - WIFI 4G 5G
HFC - Answers - hybrid fiber coax
digital subscriber line - Answers - use existing line i.e tlephone
wireless netowrk acess entworks - Answers - shared wireless connections end system
to router
WLAN - Answers - Wireless Local Area Network. Uses wired radio waves not physical
Wide-area cellular access networks - Answers - - provided by mobile, cellular network
operator (10's km)
- 10's Mbps
- 4G cellular networks (5G coming)
reason its called cellular network - Answers - divided into zones
enterprise networks - Answers - mix of wired, wireless link technologies, connecting a
mix of switches and routers
data center networks - Answers - high bandwith links connect to 100s or servers
tranmission delay - Answers - L/R
How does host send packets of data - Answers - takes applicaiton message, breaks into
packets of legnth L, transmists packets into access network at trasmission rate R, link
transmission rate
bit - Answers - propagates between tramistter/reciever pair
, physical link - Answers - what lies between transmitter and reciever
guided media - Answers - signals propogate in solid media ie cable
unguided media - Answers - signal propogates freely i.e radio
twisted pair - Answers - two insulated copper wires
coaxial cable - Answers - - Two concentric copper conductors
- Bidirectional
- Broadband:
- Multiple channels on cable
- HFC
fiber-optic cable - Answers - glass fibers that use light to transmit information, low error
rate and high speed
Wireless radio - Answers - signal carried in various bands not physical wire, half duplex,
reflection, obstruction and interference
radio link types - Answers - wireless LAN, wide-area, bluetooth, terrestrial microwave,
satellite
packet switching - Answers - host break application layer messages into packets
forwarding - Answers - move packets from router's input to appropriate router output
routing - Answers - global action determine source destination paths taken by a packet
delay time - Answers - total time taken to send and recieve given packets
store and forward - Answers - entire packet must arrive at the router before it can be
transmitted on next link
queueing - Answers - occurs when work arrives faster then it can be serviced
packet queuing and loss - Answers - if arrival exceeds transmission rate
traceroute - Answers - program that provides delay measurement from source to router.
Frequency Division Multiplexing (FDM) - Answers - -optical, electromagnetic
frequencies divided into (narrow) frequency bands
-each call allocated its own band, can transmit at max rate of that narrow band
Internet - Answers - networking infastructure that provies services to distrubuted
applications. network of networks
Applicaiton layer - Answers - user to user deals with messages i.e emials ,web objects
Transport Layer - Answers - end to end deals with sending data from segments to
correct socekt i.e multi/demultiplexic
Network Layer - Answers - host to host delivery of datagrams. Classic protocol is
internet protocol
Datalink layer - Answers - hop by hop delivery of frams i.e IP
Physical Layer - Answers - transmists bits through physical media
network protocol - Answers - hardware software message exchange
hosts - Answers - end systems running networked apps
packet switches - Answers - forward packets(chunks of data)
communication links - Answers - fiber,copper, satellite wires
badnwith - Answers - transmission rate
networks - Answers - collection od devices routers links managed by an organization
Protocols - Answers - controls ending/recieving, i.e http
internet as nuts and bolts view - Answers - a network of networks, protocols everywhere
internet as service view - Answers - infastructure that provides service to applocations,
provides programming interface to distributed applocations
LAN - Answers - local area network. Uses physical ethernet cables to connect servers
in small area
RFC - Answers - (Request for Comments) Documents are how standards and protocols
are defined and published for all to see on the IETF website.
,IETF - Answers - Internet Engineering Task Force - develops and promotes voluntary
Internet standards and protocols, in particular the standards that comprise the Internet
protocol suite (TCP/IP).
Network edges - Answers - end systems/hosts
Acess Networks, physical media - Answers - wired, wireless communication links
Network core - Answers - interconnected routers, network of networks
access network - Answers - network physically connection and end system to an edge
router
How to connect end system to edge router - Answers - residential access nets,
institutional acess netowrks, mobile access networks
mobile network access - Answers - WIFI 4G 5G
HFC - Answers - hybrid fiber coax
digital subscriber line - Answers - use existing line i.e tlephone
wireless netowrk acess entworks - Answers - shared wireless connections end system
to router
WLAN - Answers - Wireless Local Area Network. Uses wired radio waves not physical
Wide-area cellular access networks - Answers - - provided by mobile, cellular network
operator (10's km)
- 10's Mbps
- 4G cellular networks (5G coming)
reason its called cellular network - Answers - divided into zones
enterprise networks - Answers - mix of wired, wireless link technologies, connecting a
mix of switches and routers
data center networks - Answers - high bandwith links connect to 100s or servers
tranmission delay - Answers - L/R
How does host send packets of data - Answers - takes applicaiton message, breaks into
packets of legnth L, transmists packets into access network at trasmission rate R, link
transmission rate
bit - Answers - propagates between tramistter/reciever pair
, physical link - Answers - what lies between transmitter and reciever
guided media - Answers - signals propogate in solid media ie cable
unguided media - Answers - signal propogates freely i.e radio
twisted pair - Answers - two insulated copper wires
coaxial cable - Answers - - Two concentric copper conductors
- Bidirectional
- Broadband:
- Multiple channels on cable
- HFC
fiber-optic cable - Answers - glass fibers that use light to transmit information, low error
rate and high speed
Wireless radio - Answers - signal carried in various bands not physical wire, half duplex,
reflection, obstruction and interference
radio link types - Answers - wireless LAN, wide-area, bluetooth, terrestrial microwave,
satellite
packet switching - Answers - host break application layer messages into packets
forwarding - Answers - move packets from router's input to appropriate router output
routing - Answers - global action determine source destination paths taken by a packet
delay time - Answers - total time taken to send and recieve given packets
store and forward - Answers - entire packet must arrive at the router before it can be
transmitted on next link
queueing - Answers - occurs when work arrives faster then it can be serviced
packet queuing and loss - Answers - if arrival exceeds transmission rate
traceroute - Answers - program that provides delay measurement from source to router.
Frequency Division Multiplexing (FDM) - Answers - -optical, electromagnetic
frequencies divided into (narrow) frequency bands
-each call allocated its own band, can transmit at max rate of that narrow band
