PORTS PARTS I + II

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a list of ports that are important to know for the CCNA exam
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1

This protocol provides shared access to files, printers, and serial ports, and uses port 445

SERVER MESSAGE BLOCK (SMB)

2

Which kinds of ports can allow for many bits to be transferred at the same time?

PARALLEL PORTS

3

____________is used to open a connection between two devices, so that data can be transferred. It does this by having one device reach out to the other, and then a "handshake" between them is made to transfer data.

TCP

4

_____________does not make a handshake connection. It just transmits. It’s quicker, but less reliable, because there’s no agreement in place on how to transfer data, therefore errors happens

UDP

5

An FTP server can be placed in two different modes by an administrator. What are these modes?

ACTIVE AND PASSIVE

6

TRUE OR FALSE: On active mode on an FTP server, the server initiates the data connection with the client after the client has established a connection on the command channel.

TRUE

7

On an FTP server, the _______________ channel handles the delivery of commands and responses on TCP Port 21.

COMMAND CHANNEL

8

On an FTP server, the _____________ handles the actual transfer of files on TCP Port 20.

DATA CHANNEL

9

SSH (Secure Shell) is a method for secure remote login from one computer to another. What port does SSH use?

TCP Port 22

10

_______ helps to transfer computer files securely from a local to a remote host. It is similar to FTP but adds security and authentication with SSH.

SCP (SECURE COPY PROTOCOL)

11

What port does SCP use?

TCP PORT 22

12

_____________ is a way for transferring files between machines over a secure and encrypted connection – unlike FTP – which transfers data over an insecure and un-encrypted connection. It uses TCP PORT 22

Secure File Transfer Protocol

13

Name the three protocols that uses TCP port 22

SSH - SECURE SHELL

SCP - SECURE COPY PROTOCOL

SFTP - SECURE FILE TRANSFER PROTOCOL

14

This protocol uses TCP port 23, and allows for users to use TCP protocol for creating remote sessions.

Telnet

15

TCP port 25 is often attacked by spammers, but it's also a default port to send messages to a mail server. What is the name of the protocol that uses this port?

SMTP (Simple Mail Transfer Protocol)

16

This Cisco proprietary protocol uses TCP port 49 , and allows a remote access server to forward a users logon password to an authentication server to determine whether access can be allowed to a given system.

Terminal Access Controller Access Control System (TACACS)

17

This protocol uses UDP port 53, and is often called the "phonebook of the internet". What is the name of the protocol that uses UDP port 53?

DNS name queries

18

Any Web/HTTP client, such as a Web browser, uses TCP PORT __________ to send and receive requested Web pages from a HTTP server.

TCP PORT 80

19

____________ was an authentication protocol founded at MIT in the late-70s/80s by MIT engineers. Today, it’s the basis of Microsoft Windows security. What is the name of the protocol, and the port that the protocol uses?

Kerberos, UDP port 88

20

This protocol provides shared access to files, printers, and serial ports, and uses port 445

SERVER MESSAGE BLOCK (SMB)

21

This port uses port 443, and it's purpose is to support secure communication with websites to protect data privacy and integrity

HTTPS

22

This port uses port 1720, and it's purpose is to provide audio-visual communication sessions. It is widely used in videoconferencing.

H.323

23

Port 22 provides secure login and remote execution of commands. What's the name of the protocol associated with this port?

SSH 22

24

Port 161 is used to monitor and manage network devices. What's the name of the protocol associated with this port?

SNMP (Simple Network Management Protocol)

25

Which port number enables data connection to send an FRP file?

TCP Port 20

26

This is a popular remote access protocol for hosts and network devices that can be controlled through a terminal interface, and uses TCP port 22

SSH/Secure Shell

27

This protocol uses CLI for communication with a remote device or
server, sometimes for remote management, but also for
initial device setup, like network hardware. This protocol uses TCP
port 23

Telnet

28

SMTP uses which port?

tcp port 25

29

What does the letters in SMTP stand for?

simple mail tranfer protocol

30

What does the letters in TCP stand for?

TRANSMISSION CONTROL
PROTOCOL

31

A communication protocol used to connect network devices to the
internet, and can also be used as a communication protocol
for a private intranet or extranet.

TCP

32

What does the letters in UDP stand for?

USER DATAGRAM PROTOCOL

33

A connectionless network protocol that works
on top of the IP protocol. Popularly used for
streaming videos and games

UDP

34

HTTPS is assigned to which port?

TCP PORT 443

35

HTTP is assigned to this port

TCP PORT 80

36

This is used by TCP port 110

POP3

37

this is used by TCP port 143

IMAP

38

This protocol is designed to allow computers to
read and write files to a remote host over a local
area network (LAN).

SMB/Server Message Block

39

It's an alternative to SMB protocol, but it's not
the preferred "message block" to use in this day
and age

CIFS/Common Internet File System

40

Port number 445 is used for this common
"block"

SMB/Server Message Block

41

What does the letters in SNMP stand for?

Simple Network Management
Protocol

42

This protocol is an internet standard protocol for collecting and
organizing information about managed devices on IP networks, and
for modifying that information to change device behavior

SNMP/Simple Network Management Protocol

43

An SNMP agent receives requests on which
UDP port?

161

44

An SNMP management station receives SNMP
notifications on which UDP port?

162

45

Lightweight Directory Access Protocol (LDAP)
uses which port number?

TCP port 389

46

Dynamic Host Configuration Protocol (DHCP)
uses these ports.

UDP 67 + 68

47

Apple Filing Protocol (AFP, formerly known as
Apple Talk) uses this port

TCP 548

48

Service Location Protocol (SLP) uses this port
number

427

49

UDP port 161 is used to remotely manage and
monitor network devices, using this protocol

SNMP/Simple Network Management Protocol

50

TCP port 25 SENDS mail using this protocol,
while TCP Port 110 and TCP Port 143 retrieves
it

25 = SNMP | 110 = POP3 | 143 = IMAP

51

TCP port 23 is used to log into remote systems
via a virtual text terminal interface using this
protocol

Telnet

52

This protocol is used for remote logins to
Windows systems using what protocol?

RDP | TCP port 3389

53

a TCP port used by FTP session control uses
which port number

21

54

An FTP data transfer connection is established
through a TCP port number:

20

55

Which of the port numbers are used by FTP
over TLS/SSL (FTPS)? (2 answers)

989- + 990

56

TRUE/FALSE: Secure File Transfer Protocol
(SFTP) runs by default on port 22

TRUE

57

TRUE/FALSE: Secure shell (SSH) runs by
default on port 22

TRUE

58

Which UDP port number is used by DNS?

53

59

TRUE/FALSE: Secure Copy (SCP) runs by
default on port 22

TRUE

60

TRUE/FALSE: SSL is used for IMAPS

TRUE

61

TRUE/FALSE: IMAPS uses Transport Layer
Security (TLS)

TRUE

62

TRUE/FALSE: IMAPS uses TCP port 993

TRUE

63

Cryptographic protocols designed to provide
communications security over a computer
network is called _________

TLS/transport Layer Security

64

This protocol is defined by RFC 2408 for establishing Security
association and cryptographic keys in an Internet environment, and
also uses port 500

ISAKMP

65

This computer-network authentication protocol that works on the
basis of tickets to allow nodes communicating over a non-secure
network to prove their identity to one another in a secure manner.

Kerberos authentication

66

Kerberos authentication uses which port

88

67

Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to
support virtual private networks or as part of the delivery of
services by internet service providers. What port does it use?

1701

68

A network administrator has been asked to secure directory service
access with an SSL/TLS encryption. Which of the following TCP
ports needs to be opened to implement this change?

636

69

TCP port 119 is assigned to:

NETWORK NEWS TRANSFER
PROTOCOL/NNTP

70

Network Time Protocol (NTP) runs on UDP
port:

123
TRUE/FALSE:

71

TRUE/FALSE: POP3S encrypted
communication uses TLS, TCP port 995, and
SSL

TRUE

72

TRUE/FALSE: Point-to-Point Tunneling
Protocol (PPTP) runs on TCP port 1723

TRUE

73

TRUE/FALSE: Port 1701 is used by Layer 2
Forwarding Protocol (L2F) and Layer 2
Tunneling Protocol (L2TP)

TRUE

74

TRUE/FALSE: Hypertext Transfer Protocol
over TLS/SSL runs on TCP port 143

FALSE

75

TRUE/FALSE: Port number 88 is used by
Kerberos authentication system

TRUE

76

RADIUS uses which ports?

1812+1813

77

A network technician uses Remote Desktop Protocol (RDP) client
on their Windows OS to remotely troubleshoot a problem on
another Windows machine. Which of the following ports needs to
be opened for the built-in Windows RDP server to allow this type
of network connection?

TCP port 3389

78

Unblocking port number 22 enables what type
of traffic?

SSH _ SFTP

79

Which ports are assigned to the Session
Initiation Protocol (SIP)?

5060 + 5061

80

TRUE/FALSE: Secure File Transfer Protocol (SFTP) is an
extension to the Secure Shell protocol (SSH) and runs on TCP port
number 22.

TRUE

81

TCP port 25 is used by:

SMTP

82

TRUE/FALSE: SSL + TLS + port 465 are all
characteristic features of SMTPS

TRUE

83

An SNMP management station receives SNMP
notifications from Agents on UDP port:

162

84

An SNMP Agent receives requests on UDP
port:

161

85

The Secure Shell (SSH) protocol uses TCP
port:

22

86

A network administrator has been asked to set up a VPN link on a
connecting host with no dedicated VPN client application installed.
Which of the following ports needs to be opened

443

87

Which ports are used by syslog servers?

TCP 514 + TCP 6514

88

TACACS (Terminal Access Controller Access
Control System) runs on TCP port

49

89

Port number 23 is assigned to:

TELNET

90

Trivial File Transfer Protocol (TFTP) uses:

UDP port 69

91

This is considered one of the most common protocols used in VoIP technology, and it works with other applications layer protocols to control multimedia communication sessions over the internet.

Session Initiation Protocol (SIP)