Packet Switching

Packet Switching

by BSN Computing

Multiple Select

In this lesson I am going to learn to ... ?

• Describe packet switching

• Explain purpose of an IP address

• Describe the role of routers

Multiple Select

What types of data might be transmitted using packets over a network?

• E-mails

• Files

• Video

• Web pages

• All types of data

Multiple Choice

The best way to visualise a data packet is to compare it to a ________

• envelope

• letter

• e-mail

• post-it note

Multiple Select

Think about sending a letter or receiving a package.

What information needs to go on the outside

of the letter so that it gets to the right place?

• Recipient's Name

• Recipient's Address

• Recipient's postal code

• Recipient's phone number

• Recipient's e-mail address

Multiple Select

Think about sending a letter or receiving a package.

If there are many packets, how does the recipient know how to reassemble them in the correct order?

• Each packet is numbered

• Each packet is labelled

• Each packet is ordered by weight

• Each packet is ordered by colour

Multiple Choice

What is the correct technical terminology to refer to the three components of a data packet?

• Header

  Payload

  Trailer

• First

  Second

  Third

• Top

  Middle

  Bottom

• Heading

  Data

  Footing

Multiple Select

Which of these might be contained in the header of a data packet?

• destination IP address

• sequence number

• error checksum

• Hop limit (TTL)

• Data to be transmitted

Multiple Choice

A web page is being downloaded from a web server to a client computer.

Which part of the data packets containing the web page would contain the destination IP address?

• Header

• Payload

• Trailer

Multiple Choice

A web page is being downloaded from a web server to a client computer.

Which part of the data packets containing the web page would contain the identifier for the type of protocol being used?

• Header

• Payload

• Trailer

Multiple Choice

A web page is being downloaded from a web server to a client computer.

Which part of the data packets containing the web page would contain the error checksum?

• Header

• Payload

• Trailer

Multiple Choice

A web page is being downloaded from a web server to a client computer.

Which part of the data packets containing the web page would contain the data for the text and images on the web page?

• Header

• Payload

• Trailer

Multiple Select

What versions of IP addresses are currently in use?

• IPv4

• IPv5

• IPv6

• IPv3

Multiple Choice

Which type of IP address is shown?

• IPv4

• IPv6

Multiple Choice

Which type of IP address is shown?

• IPv4

• IPv6

Open Ended

Use the ipconfig command in your command line interpreter to find out the IP address(es) of the device you are currently using.

Multiple Choice

Which number sequence is correct for this process?

1. Receiving device reassembles the packets into the image.

2. Image is broken up into smaller parts.

3. Server receives the request.

4. If any packets are missing they are requested to be resent.

5. Packets make their own way across the Internet to your IP address.

6. Click download button for image.

7. Parts are put into a packet with the control info added.

• 6327514

• 1234567

• 6372145

• 3672154

Multiple Choice

What does "packet switching" refer to in a network?

• Packets being forwarded by routers towards a final destination

• Packets being swapped for another one by a router

• Packets being sent in sequence, one after the other, towards their destination

• Routers switching between packets very quickly

Multiple Select

Choose all the factors that might be considered when choosing the next "hop" for a data packet from a router

• Congestion of network

• Bandwidth of connection

• Political or geo-physical boundaries

• Size of packet in bytes

Multiple Choice

Which Internet definition is this from Wikipedia:

"the principal data routes between large, strategically interconnected computer networks and core routers of the Internet"

• Router

• Backbone

• IXP

• ISP

• TTL

Multiple Choice

Which Internet definition is this from Wikipedia:

"a networking device that forwards data packets between computer networks"

• Router

• Backbone

• IXP

• ISP

• TTL

Multiple Choice

Which Internet definition is this from Wikipedia:

" common grounds of IP networking, allowing participant Internet service providers to exchange data destined for their respective networks"

• Router

• Backbone

• IXP

• ISP

• TTL

Multiple Choice

Which Internet definition is this from Wikipedia:

"an organization that provides services for accessing, using, or participating in the Internet"

• Router

• Backbone

• IXP

• ISP

• TTL

Multiple Choice

Which Internet definition is this from Wikipedia:

"a mechanism which limits the lifespan or lifetime of data in a computer or network"

• Router

• Backbone

• IXP

• ISP

• TTL

Multiple Select

In this lesson I have learned to ...

• Describe packet switching

• Explain purpose of an IP address

• Describe the role of routers

Open Ended

Thinking Hard

How does today's lesson link to another topic we have studied this year?

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it