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3 Common UDP Ports and Services Free Online FlashCards

Study 3 Common UDP Ports and Services with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.

12 cards
01
Front

What delivery guarantees does UDP provide?

Back

UDP does not guarantee delivery, ordering, or retransmission. Applications that need these behaviors must provide them or use another transport.

02
Front

What does a familiar UDP port number tell you?

Back

A familiar port number indicates a conventional service, but does not prove that the service is running there.

03
Front

Which UDP port is commonly used for DNS queries?

Back

DNS commonly uses UDP port 53 for routine queries, including resolving domain names to IP addresses.

04
Front

Which UDP ports do the IPv4 DHCP server and client use?

Back

For IPv4 DHCP, the server uses UDP port 67 and the client uses UDP port 68.

05
Front

How do TFTP’s initial request port and transfer ports differ?

Back

TFTP requests begin at server UDP port 69; the subsequent file exchange uses transfer ports selected for that session.

06
Front

What is UDP port 123 commonly used for?

Back

NTP uses UDP port 123 to synchronize computer clocks with time servers.

07
Front

Which UDP port do managers commonly use to query SNMP agents?

Back

Network managers commonly query SNMP agents on UDP port 161.

08
Front

What kind of traffic does RTP commonly carry over UDP?

Back

RTP commonly runs over UDP to carry real-time audio and video, such as voice calls and streaming media.

09
Front

Which UDP ports do the DHCPv6 server and client use?

Back

DHCP for IPv6 uses UDP port 547 on the server and UDP port 546 on the client.

10
Front

Does DNS use only UDP port 53?

Back

DNS also uses TCP port 53, including for zone transfers and other cases requiring TCP.

11
Front

What access-control limitation should be considered when using TFTP?

Back

TFTP has no built-in login or access control, so access to it requires careful restriction.

12
Front

What is UDP port 162 commonly used for in SNMP?

Back

SNMP notification receivers commonly listen on UDP port 162 for traps or other notifications.