Crash Course Computer Science #29 - The Internet

Computers using the ​ (a)   first connect to their ​ (b)   before connecting to ​ (c)   before ultimately connecting to ​ (d)   like for cities.

• internet
• LAN
• nearby WAN
• large scale WANs

You can see how data travels by reviewing the route data in your computer's __ program.

• routepath

• traceroute

• dataroute

• reviewroute

Data travels the internet in

• packets

• switches

• codes

• addresses

Internet packets have to conform to a standard called

• IP

• OP

• AP

• EP

IP is a little too simple, so more advanced protocols were developed that sit on top of IP. One of the simplest and most common is

• User Datagram Protocol

• User Database Program

• United Data Program

• Userbase Datagram Program

Inside the UDP header is useful, extra information like

• port number

• post number

• path number

• portal number

​ (a)   gets the packet to the right ​ (b)   , but ​ (c)   gets the packet to the right ​ (d)   .

• IP
• computer
• UDP
• program

What is the CHECKSUM in the example?

What happens if the checksum is incorrect?

• the program will seek a new, revised copy

• the program will fix the data by recalculating the sum

• the program will discard the packet

• the program with return the packet to the original sender

When it's really important for a packet to get to its destination in whole, ____ protocol is used.

• transmission control

• transfer confirmation

• total control

• telecomm communication