Introduction Flashcards
What is the internet made out of?
Hosts, links, routers, and protocols
Network edge is the stuff on the outside of the network, like?
Applications, computers, phones, internet providers
Define client/server Model
Server is always on to provide resources for the client who is not always on the server
Define peer-to-peer model
Everybody is a client and a server
Access Network connects what
Network edge with end system
Give a cellular access network example
4G, LTE, or 3G
How is data transferred through the network?
Packet and circuit switching
What does it end to end mean in circuit switching
Making sure a direct path to both ends is fully reserved for communication
Frequency Division Multiplexing is what?
- A type of circuit switching
- FDM divides the medium into multiple distinct, static frequencies
Time Division Multiplexing is what?
- A type of circuit switching
- TDM divides the medium into multiple time slots that are reserved for users
What is packet switching?
Packet switching is dividing a packet and sending it part by part over the network
Differences between packet and circuit switching?
- Packet does not need end-to end resource reservation
- Packet does not need constant allocation of bandwidth
- Packet does not need to split bandwidth
- Circuit can not cause congestion
What is the store and forward property of routers?
Routers work and forward one bit at a time
What is an ISP and how do they connect with each other?
ISP is internet service provider and they connect through peering links
What are the four sources of packet delay?
Processing, transmission, queue, and propagation
