Lecture 2 Power Point Notes

[Y/N] Can an access network connect directly to a global level Tier-1 ISP?

Yes

Two ways to make connections between hosts.

Circuit Switching; Packet Switching

A way to make connections between hosts that consists of reserved resources.

Circuit Switching

A way to make connections between hosts that does not consist of reserved resources.

Packet Switching

In ___, the resources needed for the communication between end systems (e.g., buffers, link transmission rates) are reserved for the duration of the session

circuit switching

a way of communicating over a network where a dedicated path is reserved between two devices for the entire communication session.

Circuit Switching

In ___, once the connection is established, that path's resources are reserved for you until the communication ends.

circuit switching

In ___, the main advantage is predictable, consistent performance because resources are reserved. The main disadvantage is inefficiency: if you're not actively transmitting anything, the reserved capacity can sit unused.

circuit switching

The internet uses _. Packets ‘figure out’ where to go next, one router at a time. No resource is dedicated for the packet’s journey

packet switching

_ is a way of sending data over a network by breaking the data into smaller pieces called packets and sending those packets through a shared network.

Packet switching

Unlike circuit switching, no dedicated path is reserved for you. Your packets share network resources with packets from many other users.

Packet Switching

When dedicated connections share time among the other connections.

Time Domain Multiplexing(TDM)

In this circuit switching method, connections take turns using the resource/link. When one connection uses the resource/link, the other connections wait.

Time Domain Multiplexing(TDM)

A technique that allows multiple users to share the same communication link by giving each user their own repeating time slot.

Time Domain Multiplexing(TDM)

_ can be used to implement circuit switching. Instead of giving one connection the entire physical link, the network reserves a specific portion of time on that link for each connection.

Time Domain Multiplexing(TDM)

When dedicated connections share frequency among connections.

Frequency Domain Multiplexing(FDM)

_ is a technique that allows multiple users to share the same communication link by giving each user a different frequency range (band).

Frequency Domain Multiplexing(FDM)

With _, all of these stations are transmitting at the same time, but because they use different frequencies, their signals don't interfere with one another.

Frequency Domain Multiplexing(FDM)

In Time Division Multiplexing(TDM), time is divided into ___ of fixed duration with each one divided into a fixed number of time slots. Each connection gets on time slot per ___.

frame(s)