Network devices

Question 1

what do cables allow you to do?

Answer 1

form point to point networking connections

Question 2

What are point to point networking connections?

Answer 2

networks where only a single device at each end of the link exists.

Question 3

Point to point connections are less useful in

Answer 3

a world with billions of computers.

Question 4

the most simple network device that lets many devices communicate with each other. (fairly obsolete)

Answer 4

hub

Question 5

a physical layer device that allows for connections from many computers at once. Only lets one talk at a time, and doesn’t use csma cd.

Answer 5

Hub

Question 6

All devices connected to a____ will end up talking to all other devices at the same time

Answer 6

hub

Question 7

What do devices on the receiving end of data being sent in a hub do?

Answer 7

determine if incoming data is meant for them or ignore it if it isn’t.

Question 8

collision domain

Answer 8

a network segment where only one device can communicate at a time.

Question 9

If multiple systems try sending data at the same time

Answer 9

the electrical pulses sent across the cable can interfere with each other.

Question 10

what do devices connected to a hub need to do in a collision domain ?

Answer 10

They have to wait for a quiet period before they can try sending data again. This is super inconvenient and slow. I don’t recommend it. this is why hubs are fairly rare.

Question 11

Common way of connecting computers today

Answer 11

Network switch, switching hub.

Question 12

you can connect many devices to this so they can communicate. Data link device. Can inspect the contents of the ethernet protocol data being sent, determine which system it is intended for, and then only send that data to that one system.

Answer 12

switch

Question 13

How are collision domains reduced or eliminated on a network?

Answer 13

a switch reads the ethernet information to discover where to send the data and only sends the data to the device it is intended for. this leads to fewer transmissions and higher overall throughput.

Question 14

the primary devices used to connect computers on a single network, usually referred to as a LAN, or local area network.

Answer 14

Hubs and Switches

Question 15

A device that knows how to forward data between independent networks. This makes it so we can send data outside of LAN.

Answer 15

Router

Question 16

What layer does a router operate at?

Answer 16

the network layer, layer 3.

Question 17

What network device can inspect IP data to determine where to send things?

Answer 17

A router.

Question 18

What devices store internal tables with information about how to route traffic between lots of worldwide networks.

Answer 18

Routers

Question 19

Most common type of router? How detailed is the routing table?

Answer 19

One for a home network or small office, with less detailed routing tables.

Question 20

Purpose of most routers:

Answer 20

taking traffic originating from inside the home or office LAN and forwarding it to the ISP or internet service provider.

Question 21

What takes over when the traffic is at the ISP?

Answer 21

Core Routers.

Question 22

the backbone of the internet. directly responsible for how we send and receive data all over the internet every day. Handle a lot more traffic than a home or small office router. More complexity in making decisions about where to send traffic. Many different connections to many other routers.

Answer 22

Core ISP routers:

Question 23

How routers share data with each other

Answer 23

border gateway protocol

Question 24

Routers share data with each other via this protocol, which lets them learn about the most optimal paths to forward traffic.

Answer 24

Border gateway protocol (BGP)

Question 25

How far could web browser data have traveled when you open a browser?

Answer 25

the web browser data could have traveled over dozens of routers to get to your computer.

Question 26

Global guides for getting traffic to the right places

Answer 26

Routers.

Question 27

a device connected to the network

Answer 27

nodes

Question 28

something providing data to something requesting data. anything that can provide data to a client.

Answer 28

server

Question 29

something receiving data that a server provides.

Answer 29

client

Question 30

what can be a server or client?

Answer 30

anything. A computer, a computer program. Each node is primarily a server or a client.

Question 31

what do server or client refer to?

Answer 31

The words refer to the primary purpose of a node on a network.