Ports & Protocols

Question 1

Telnet Port#

Answer 1

23

Question 2

FTP port#

Answer 2

20,21

Question 3

SFTP port#

Answer 3

22

Question 4

TFTP port# protocol

Answer 4

69, UDP

Question 5

SMTP port#

Answer 5

25

Question 6

POP port#

Answer 6

110

Question 7

IMAP port#

Answer 7

143

Question 8

RDP port#

Answer 8

3389

Question 9

TLS/SSL#

Answer 9

995/465

Question 10

SNMPv3 port#

Answer 10

161

Question 11

Secure Shell port#

Answer 11

22

Question 12

HTTPS port#

Answer 12

443

Question 13

NTP port# protocol

Answer 13

123 UDP

Question 14

SMB port#

Answer 14

445

Question 15

What ports can SMB also run on?

Answer 15

NetBIOS ports

Question 16

DNS port# protocols

Answer 16

53 TCP/UDP

Question 17

DHCP port# protocol

Answer 17

67/68 UDP

Question 18

What protocol uses same ports as DHCP?

Answer 18

Bootstrap protocol

Question 19

SNMPv1/2 port# protocol

Answer 19

161 UDP

Question 20

What port range is reserved for well-known port numbers and in which RFC are they defined?

Answer 20

0-1023, RFC3232

Question 21

In TCP, which port defines the virtual circuit?

Answer 21

the source port number (SP) of the transmitting host

Question 22

port number 389 is used for what protocol? What protocol type does it use?

Answer 22

LDAP, TCP

Question 23

Port#, and protocol types used for LDAPS (SSL)

Answer 23

636, TCP/UDP

Question 24

What is H.323 and what port# and protocol type does it use?

Answer 24

H.323 is similar to SIP and facilitates VoIP and videoconferencing over the internet. It uses TCP port 1720

Question 25

What is SSH?

Answer 25

SSH or Secure Shell, is a cryptographic protocol that’s mainly used to remotely administer Linix servers and network equipment through a text console.

Question 26

RDP is used on Unix servers, true or false?

Answer 26

False. It’s used for connecting Microsoft Windows servers

Question 27

The SIP protocol sets up and transmits voice over IP calls. TRUE or FALSE?

Answer 27

False, SIP only sets up the call and controls signalling. IT doesn’t transport the media stream.

Question 28

What does a SIP trunk do?

Answer 28

Connects VoIP PBX to the PSTN

Question 29

Name the SIP port#;s and protocol types

Answer 29

5060/5061 UDP/TCP

Question 30

What is the Linux equivalent of SMB?

Answer 30

Samba

Question 31

Ports are registered with which internet organization?

Answer 31

Internet Assigned Numbers Authority

Question 32

Name 4 main features of a connectionless protocol

Answer 32

1) NO STATE - No connection setup or connection tracking
2) NO GUARANTEE OF MESSAGE DELIVERY - Receipt of data is not acknowledged
Transmission is one-way
3) NO GUARANTEE OF ORDER DELIVERY - received data is not re-ordered if it arrives out of sequence.
4) NO CONGESTION CONTROL

Question 33

What does RTP stand for and what does it do?

Answer 33

Real-Time Transport Protocol. It’s apacket formatting standard for delivering audio and video over the internet.

Question 34

Name the RTP port#’s and protocol types

Answer 34

5004/5005 TCP/UDP

Question 35

What protocol works on TCP 2427/2727?

Answer 35

Media Gateway Control Protocol (MGCP)

Question 36

What is the DHCP DORA process?

Answer 36

DORA is the 4-step process a client takes to receive an IP address from a DHCP server.

1) Discover
2) Offer
3) Request
4) Acknowledge

Question 37

List the key protocols (for CompTIA) that use UDP

Answer 37

SNMP 161
TFTP 69
DNS 53
BOOTPS/DHCP 67,68
NTP 123