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Free Online Flashcard Deck

4 Protocol and Port Practice Free Online FlashCards

Study 4 Protocol and Port Practice with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.

12 cards
01
Front

What does a port number help identify?

Back

An IP address identifies a host; a port number helps identify an application service on that host.

02
Front

What delivery properties does TCP provide?

Back

TCP is connection-oriented and provides reliable, in-order delivery of a byte stream.

03
Front

How does UDP delivery differ from TCP?

Back

UDP sends independent datagrams without TCP’s connection setup or delivery and ordering guarantees.

04
Front

Does a registered port prove which application is using it?

Back

A registered port is a useful clue, not proof of the application; services can use alternate ports.

05
Front

Which transport and port does SSH commonly use?

Back

SSH commonly uses TCP 22 for secure remote login and administration.

06
Front

Which TCP ports serve classic active-mode FTP control and data?

Back

Classic active-mode FTP uses TCP 21 for control and TCP 20 for data; passive-mode data uses a negotiated port.

07
Front

Which transports can DNS use on port 53?

Back

DNS uses both UDP and TCP on port 53; it is not limited to UDP.

08
Front

Which UDP ports do a DHCPv4 server and client use?

Back

DHCPv4 uses UDP 67 on the server side and UDP 68 on the client side.

09
Front

What is the common transport and port for HTTP?

Back

HTTP commonly uses TCP 80 for web traffic.

10
Front

How does HTTP/3 transport differ from common TCP-based HTTPS?

Back

HTTPS commonly uses TCP 443, while HTTP/3 runs over QUIC using UDP, commonly on port 443.

11
Front

What are the common TCP ports for POP3 and IMAP?

Back

POP3 commonly uses TCP 110, while IMAP commonly uses TCP 143.

12
Front

Which transport and port does NTP commonly use?

Back

NTP commonly uses UDP 123 to synchronize clocks.