COMPTIA A+ CORE 1 NETWORKING QUESTIONS AND
ASNWERS YEAR 2025.
FTP (File Transfer Protocol) - ✅✅an internet standard that permits file uploading and
downloading to and from other computers on the internet. TCP 21
Secure Shell (SSH) Protocol - ✅✅A cryptographic network protocol for operating
network services securely over an unsecured network. The best known example
application is for remote login to computer systems by users.
TCP port 22
Telnet - ✅✅Unencrypted remote logins TCP 23
Simple Mail Transfer Protocol (SMTP) - ✅✅An Internet-standard protocol for sending
email messages between servers on IP networks. Because SMTP is generally used to
send messages from a mail client to a mail server, you should specify both the POP or
IMAP server and the SMTP server when configuring an email application.
TCP 25
Domain Name System (DNS) - ✅✅Internet service that translates domain names into
IP addresses. UDP 53
HTTP (Hypertext Transfer Protocol) - ✅✅the protocol used for transmitting web
pages over the Internet. TCP 80
POP3 (Post Office Protocol version 3) - ✅✅A protocol used from retrieving email from
a mailbox on the mail server. TCP 110
IMAP (Internet Message Access Protocol) - ✅✅a common protocol for retrieving
email messages via the Internet. TCP UDP 143
HTTPS (Hypertext Transfer Protocol Secure) - ✅✅An encrypted version of HTTP. It
uses port TCP 443.
RDP (Remote Desktop Protocol) - ✅✅The protocol used by Microsoft's Terminal
Set.vices implementations. TCP 3389
NetBIOS/NetBT - ✅✅hat allows legacy computer applications relying on the NetBIOS
API to be used on modern TCP/IP networks. 137-139
SMB/CIFS (Server Message Block and Common Internet File System) - ✅✅is a
communication protocol for providing shared access to files, printers, and serial ports
, between nodes on a network. It also provides an authenticated inter-process
communication mechanism. Port 445
SLP (Service Location Protocol) - ✅✅a service discovery protocol that allows
computers and other devices to find services in a local area network without prior
configuration.
TCP 427
UDP 427
AFP (Apple Filing Protocol) - ✅✅An outdated file access protocol used by early
editions of the Mac operating system by Apple and is one protocol in the suite of
AppleTalk networking protocols. TCP 548
DHCP (Dynamic Host Configuration Protocol) - ✅✅A network service that provides
automatic
assignment of IP addresses and other TCP /IP configuration information. UDP 67, 68
LDAP (Lightweight Directory Access Protocol) - ✅✅A communications protocol that
defines how a client can access information, perform operations, and share directory
data on a server. TCP 389
SNMP (Simple Network Management Protocol) - ✅✅An Application-layer protocol
used to exchange information between network devices. UDP 161/162
TCP (Transmission Control Protocol) - ✅✅A connection-oriented, guaranteed-
delivery
protocol used to send data packets between computers over a network like the Internet.
UDP (User Datagram Protocol) - ✅✅connectionless protocol that does not require a
connection to send a packet and does not guarantee that the packet arrives at its
destination
TCP/IP - ✅✅Transmission Control Protocol/Internet Protocol. Protocol that connects
computers to the Internet. Tells computers how to exchange information over the
Internet.
Application layer (OSI) - ✅✅-contains the networking application protocol that is used
to "Carry and present" the "payload" or data
-is the protocol that defines the data that the user views while using applications
-AKA layer 7
Presentation Layer (OSI) - ✅✅-performs 3 main functions:
-data formatting: converts data to/from standardized formats
-data compression/expansion: reduces large amounts of data into smaller file sizes
ASNWERS YEAR 2025.
FTP (File Transfer Protocol) - ✅✅an internet standard that permits file uploading and
downloading to and from other computers on the internet. TCP 21
Secure Shell (SSH) Protocol - ✅✅A cryptographic network protocol for operating
network services securely over an unsecured network. The best known example
application is for remote login to computer systems by users.
TCP port 22
Telnet - ✅✅Unencrypted remote logins TCP 23
Simple Mail Transfer Protocol (SMTP) - ✅✅An Internet-standard protocol for sending
email messages between servers on IP networks. Because SMTP is generally used to
send messages from a mail client to a mail server, you should specify both the POP or
IMAP server and the SMTP server when configuring an email application.
TCP 25
Domain Name System (DNS) - ✅✅Internet service that translates domain names into
IP addresses. UDP 53
HTTP (Hypertext Transfer Protocol) - ✅✅the protocol used for transmitting web
pages over the Internet. TCP 80
POP3 (Post Office Protocol version 3) - ✅✅A protocol used from retrieving email from
a mailbox on the mail server. TCP 110
IMAP (Internet Message Access Protocol) - ✅✅a common protocol for retrieving
email messages via the Internet. TCP UDP 143
HTTPS (Hypertext Transfer Protocol Secure) - ✅✅An encrypted version of HTTP. It
uses port TCP 443.
RDP (Remote Desktop Protocol) - ✅✅The protocol used by Microsoft's Terminal
Set.vices implementations. TCP 3389
NetBIOS/NetBT - ✅✅hat allows legacy computer applications relying on the NetBIOS
API to be used on modern TCP/IP networks. 137-139
SMB/CIFS (Server Message Block and Common Internet File System) - ✅✅is a
communication protocol for providing shared access to files, printers, and serial ports
, between nodes on a network. It also provides an authenticated inter-process
communication mechanism. Port 445
SLP (Service Location Protocol) - ✅✅a service discovery protocol that allows
computers and other devices to find services in a local area network without prior
configuration.
TCP 427
UDP 427
AFP (Apple Filing Protocol) - ✅✅An outdated file access protocol used by early
editions of the Mac operating system by Apple and is one protocol in the suite of
AppleTalk networking protocols. TCP 548
DHCP (Dynamic Host Configuration Protocol) - ✅✅A network service that provides
automatic
assignment of IP addresses and other TCP /IP configuration information. UDP 67, 68
LDAP (Lightweight Directory Access Protocol) - ✅✅A communications protocol that
defines how a client can access information, perform operations, and share directory
data on a server. TCP 389
SNMP (Simple Network Management Protocol) - ✅✅An Application-layer protocol
used to exchange information between network devices. UDP 161/162
TCP (Transmission Control Protocol) - ✅✅A connection-oriented, guaranteed-
delivery
protocol used to send data packets between computers over a network like the Internet.
UDP (User Datagram Protocol) - ✅✅connectionless protocol that does not require a
connection to send a packet and does not guarantee that the packet arrives at its
destination
TCP/IP - ✅✅Transmission Control Protocol/Internet Protocol. Protocol that connects
computers to the Internet. Tells computers how to exchange information over the
Internet.
Application layer (OSI) - ✅✅-contains the networking application protocol that is used
to "Carry and present" the "payload" or data
-is the protocol that defines the data that the user views while using applications
-AKA layer 7
Presentation Layer (OSI) - ✅✅-performs 3 main functions:
-data formatting: converts data to/from standardized formats
-data compression/expansion: reduces large amounts of data into smaller file sizes
