Computer Networking Quiz

How do TCP and IP interact?

• IP forwards the data to the DNS server to identify which TCP to use.

• TCP hands off control to HTTP, which passes it to IP.

• TCP creates packets from the data to be sent and transfers control to IP for routing.

• IP uses the SSL in conjunction with TCP to securely send data.

How does a computer turn a domain name into an IP address?

• It asks a DNS server for the corresponding IP address

• It scans addresses until it finds the one it's looking for

• It uses a Border Gateway Protocol to get the address from a nearby computer.

• It creates an IP address for the domain, and shares it with the closest DNS.

How do Internet packets travel to their destination?

• Along the same path and always in the same order.

• Along the same path and potentially out of order.

• Along a variety of different paths and potentially out of order.

• Along a variety of different paths and always in the same order.

What does it mean when we say the Internet is redundant?

• Parts of it are unnecessary.

• If a path is down, packets can be routed a different way.

• It has a delay between the request and the response to the request.

• If there is an error, a backup system is brought online to be used.

The figure below represents a network of physically linked computers labeled A through F. A line between two computers indicates that the computers can communicate directly with each other. Any information sent between two computers that are not directly connected must go through at least one other computer. For example, information can be sent directly between computers B and D, but information sent between B and E must go through other computers. What is the minimum number of connections that must be broken or removed in the network before computer A can no longer communicate with computer F?

• 1

• 2

• 3

• 4

How do the World Wide Web and the Internet work together?

• They perform the same functionality.

• The Web using HTTP to share data and information using the Internet.

• The Internet uses the Web to connect devices to share data.

• The Internet has the "deep" net and "dark" net but the Web does not.

How does the end-to-end architecture of the Internet work?

• It's designed like a circle; so ironically, there are no "ends".

• Packets are created at the sender's end and reassembled at the receiver's end.

• It uses HTML to share documents among users when requested through their web browsers.

• It creates redundancy, so when part of the Internet is down, information can keep flowing.

Which of the following best describes the basic idea of fault tolerance?

• A system that never fails.

• If part of the system fails, the operation continues without interruption.

• A program that does not allow inputs out of a range given by the programmer.

• A program that does not allow loss of precision.

Which of the following statements are true about routers and routing on the Internet? Choose two answers.

• Protocols ensure that a single path between two computers is established before sending packets over it.

• Routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic.

• A packet traveling between two computers on the Internet may be rerouted many times along the way or even lost or "dropped".

• Routers act independently and route packets as they see fit.

When does sequential computing work better than parallel computing?

• When a task needs to be completed before another task can begin

• When you can do 2 or more tasks at the same time

• When you have run out of space on your CPU

• When you are doing the same task over and over again, sequential computing would be faster than parallel computing.