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Free Practice Quiz Question List

How the Internet Works Online Quiz Questions

Use this free practice quiz with 20 questions to review How the Internet Works, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: DNS itself carries the web page from the server to the browser.

  1. A

    True

  2. B

    False

02
Choose one
1 point

A laptop needs to send an IP packet to a destination outside its local subnet. Which device should normally receive the packet first on the local network?

  1. A

    The destination web server

  2. B

    The local Ethernet switch

  3. C

    The local router

  4. D

    The DNS authoritative server

03
Written response
1 point

Which protocol exchanges reachability information between Autonomous Systems?

04
Fill in the blank
1 point

An IPv4 address contains bits.

05
True or false
1 point

True or false: An application using UDP automatically receives guaranteed delivery and ordered data.

  1. A

    True

  2. B

    False

06
Choose one
1 point

What happens to a link-layer frame when an IP packet passes through a router to the next link?

  1. A

    The original frame is preserved across every link

  2. B

    The old frame is removed and a new frame is created for the next link

  3. C

    The IP packet is converted into a DNS record

  4. D

    The router sends the data as one uninterrupted signal

07
Choose all
1 point

Select all statements that describe TCP's service or mechanisms.

  1. A

    It can retransmit lost data

  2. B

    It presents an ordered byte stream to the application

  3. C

    It guarantees that every packet will arrive without any delay

  4. D

    It uses flow control and congestion control

  5. E

    It never uses sequence numbers or acknowledgments

08
Written response
1 point

For the IPv4 prefix 203.0.113.0/24, how many leading bits identify the network prefix?

09
Fill in the blank
1 point

The gateway function that commonly lets many private IPv4 devices share one public address is .

10
Choose one
1 point

Which DNS component holds the resource records for a particular domain?

  1. A

    A root name server that directs queries toward top-level domains

  2. B

    An authoritative name server that holds records for a particular domain

  3. C

    A local Ethernet switch that forwards frames

  4. D

    A backbone router that selects an IP next hop

11
Choose all
1 point

Select all examples of access networks that can connect a user or local network to an ISP.

  1. A

    Fiber-to-the-home

  2. B

    Cable broadband

  3. C

    An Ethernet switch connecting devices inside a LAN

  4. D

    A cellular network

  5. E

    An Internet exchange point connecting backbone networks

12
True or false
1 point

True or false: Routing determines or learns possible paths, whereas forwarding uses the current forwarding table to send a packet to its next hop.

  1. A

    True

  2. B

    False

13
Choose one
1 point

A server host is running several network applications at once. Which destination field helps its operating system deliver received data to the correct application?

  1. A

    The destination IP address

  2. B

    The destination MAC address

  3. C

    The destination transport-layer port

  4. D

    The IPv4 time-to-live field

14
Open ended
1 point

Explain how the Internet allows networks operated by different organizations to interconnect even when they use different equipment and internal designs. In your answer, state why the Internet does not require a single organization to control all of its networks.

15
Choose one
1 point

Which description best identifies a local area network (LAN)?

  1. A

    A connection between an ISP and a backbone provider

  2. B

    A network connecting devices in a limited location

  3. C

    A protocol used to exchange routes between autonomous systems

  4. D

    A service that maps domain names to IP addresses

16
Written response
1 point

Enter the full name of the protocol used between autonomous systems to exchange reachability information and apply routing policies.

17
Choose one
1 point

A laptop needs to send an IP packet to a destination outside its local subnet. To which device does it normally send the packet first?

  1. A

    The destination server’s MAC address

  2. B

    A DNS root server

  3. C

    The local router

  4. D

    The ISP’s BGP speaker

18
Written response
1 point

What is the technical term for the identifier that helps an operating system deliver received transport data to the correct application on a host?

19
Choose one
1 point

What normally happens to a packet’s link-layer framing when it passes through an intermediate router?

  1. A

    The original Ethernet frame is preserved unchanged across every hop.

  2. B

    The old link-layer frame is removed and a new frame is created for the next link.

  3. C

    The router converts every IP packet into a DNS resource record.

  4. D

    The router replaces the destination IP address with the next router’s IP address.

20
Choose one
1 point

A router has several forwarding entries whose prefixes all match a destination IP address. Which rule determines the entry normally used?

  1. A

    The route with the shortest prefix is always selected.

  2. B

    The route learned from the oldest protocol is selected.

  3. C

    The most specific matching route is selected.

  4. D

    The route with the largest next-hop address is selected.