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Free Practice Quiz Question List

2 Protocols and Ports Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Protocols and Ports, test your knowledge, and prepare for your next test or exam.

20 questions
01
Fill in the blank
1 point

A browser fetching a page over ordinary HTTP commonly connects to TCP port .

02
Written response
1 point

SSH provides encrypted remote login. What TCP port is commonly associated with SSH?

03
Choose one
1 point

A device has just joined a network and needs configuration before it has a usable IP address. Which traffic pattern is most consistent with it requesting configuration through DHCP?

  1. A

    TCP ports 67 and 68, used for web requests

  2. B

    UDP port 67 for the server and UDP port 68 for the client

  3. C

    UDP port 68 for the server and UDP port 67 for the client

  4. D

    TCP port 80 for the client and UDP port 67 for the server

04
Choose one
1 point

A mail client accesses and manages messages and folders kept on a mail server using IMAP without implicit TLS. Which port is the common choice?

  1. A

    TCP port 110

  2. B

    UDP port 143

  3. C

    TCP port 143

  4. D

    TCP port 993

05
Written response
1 point

A client retrieves email using POP3 over implicit TLS. What TCP port is commonly used?

06
True or false
1 point

TCP port 53 and UDP port 53 are distinct because a port is tied to its transport protocol.

  1. A

    True

  2. B

    False

07
Choose all
1 point

Select all the correct descriptions of these email protocols.

  1. A

    SMTP sends or relays outgoing email.

  2. B

    POP3 retrieves email from a mailbox, often by downloading messages to a client.

  3. C

    IMAP lets a client access and manage messages and folders kept on a mail server.

  4. D

    IMAP is the protocol used to assign a host its IP address and default gateway.

08
True or false
1 point

If traffic uses a commonly associated service port, that alone proves which application generated the traffic.

  1. A

    True

  2. B

    False

09
Choose one
1 point

A browser uses HTTP/3. Which statement best describes why a connection to UDP port 443 could fit that traffic?

  1. A

    UDP port 443 is used only for traditional HTTP.

  2. B

    UDP port 443 may carry HTTP/3 over QUIC.

  3. C

    HTTP/3 uses TCP port 80.

  4. D

    HTTP/3 uses UDP port 53.

10
Written response
1 point

A mail app submits a message to its provider using the common message-submission service that is not the implicit-TLS service. What TCP port is commonly used?

11
Fill in the blank
1 point

To support reliable delivery, TCP data that is lost in transit.

12
Choose all
1 point

Select all the accurate statements about DNS transports and port use.

  1. A

    Ordinary DNS queries commonly use UDP.

  2. B

    DNS also uses TCP, including for zone transfers and when needed for larger responses.

  3. C

    DNS can use port 53 with either TCP or UDP.

  4. D

    DNS uses TCP port 80 for zone transfers.

13
Choose one
1 point

A network analyst wants to identify a particular network endpoint. Which set of information best matches the identifying components described in the material?

  1. A

    The IP address and application name only

  2. B

    The transport protocol and port only

  3. C

    The IP address, transport protocol, and port

  4. D

    The port and direction of travel only

14
Open ended
1 point

A network log shows one mail server initiating a connection to another server on TCP port 25. What is the likely purpose of the connection, and why should an analyst treat that interpretation as a clue rather than proof? Include one other factor to check when interpreting the traffic.

15
Choose one
1 point

A browser fetches a page using ordinary, non-encrypted web traffic over TCP port 80. Which protocol is the most likely explanation?

  1. A

    HTTP

  2. B

    SSH

  3. C

    DNS

  4. D

    SMTP

16
Choose one
1 point

An administrator connects to a remote system using TCP port 22. Which service is the most likely explanation?

  1. A

    DNS name resolution

  2. B

    Encrypted remote login using SSH

  3. C

    Automatic host configuration using DHCP

  4. D

    Web traffic using HTTP

17
Choose one
1 point

A mail client connects over TCP port 993 to manage messages and folders that remain on the mail server. Which protocol is it most likely using?

  1. A

    POP3 retrieving messages by downloading them to a client

  2. B

    SMTP relaying outgoing mail between servers

  3. C

    IMAP managing messages and folders kept on a mail server

  4. D

    DHCP providing a host with network configuration

18
Choose one
1 point

A mail app connects to its provider using TCP port 587 to send a message. What is this port most commonly used for?

  1. A

    Server-to-server mail transfer

  2. B

    A mail app submitting a message to its provider

  3. C

    Retrieving mail with POP3 over implicit TLS

  4. D

    Managing an IMAP mailbox over implicit TLS

19
Written response
1 point

A mail client retrieves messages using POP3 protected with implicit TLS over TCP. What is the common port number?

20
True or false
1 point

True or false: A port number by itself reveals the full contents and safety of a network connection.

  1. A

    True

  2. B

    False