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#

Secure SMTP

Answer 5

25

465

Question 6

POP3 port#

Secure POP3

Answer 6

110

995

Question 7

IMAP port#

IMAPS port#

Answer 7

143

993

Question 8

RDP port#

Answer 8

3389

Question 9

Secure Shell port#

Answer 9

22

Question 10

HTTPS port#

Answer 10

443

Question 11

NTP port# protocol

Answer 11

123 UDP

Question 12

SMB port#

Answer 12

445

Question 13

What ports can SMB also run on?

Answer 13

NetBIOS ports

Question 14

DNS port# protocols

Answer 14

53 TCP/UDP

Question 15

DHCP port# protocol

Answer 15

67/68 UDP

Question 16

What protocol uses same ports as DHCP?

Answer 16

Bootstrap protocol

Question 17

SNMPv1/2 ports# protocol

Answer 17

161 UDP 162 (Trap) UDP

Question 18

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

Answer 18

0-1023, RFC3232

Question 19

In TCP, which port defines the virtual circuit?

Answer 19

the source port number (SP) of the transmitting host

Question 20

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

Answer 20

LDAP, TCP/UDP

Question 21

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

Answer 21

636, TCP/UDP

Question 22

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

Answer 22

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

Question 23

What is SSH?

Answer 23

SSH or Secure Shell, is a cryptographic protocol that’s mainly used to administer Unix/Linux/Network equipment

Question 24

RDP is used on Unix servers, true or false?

Answer 24

False. It’s used for connecting Microsoft Windows servers

Question 25

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

Answer 25

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

Question 26

What does a SIP trunk do?

Answer 26

Connects VoIP PBX to the PSTN

Question 27

Name the SIP port#;s and protocol types

Answer 27

5060/5061 UDP/TCP

Question 28

What is the Linux equivalent of SMB?

Answer 28

Samba

Question 29

Ports are registered with which internet organization?

Answer 29

Internet Assigned Numbers Authority

Question 30

Name 4 main features of a connectionless protocol

Answer 30

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 31

What does RTP stand for and what does it do?

Answer 31

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

Question 32

Name the RTP port#'s and protocol types

Answer 32

5004/5005 TCP/UDP

Question 33

What protocol works on TCP 2427/2727?

Answer 33

Media Gateway Control Protocol (MGCP)

Question 34

What is the DHCP DORA process?

Answer 34

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 35

List the 5 key protocols (for CompTIA) and their port numbers that use UDP

Answer 35

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

Question 36

What is the range of port numbers known as ephemeral port numbers used by clients as the source port?

Answer 36

49,152 - 65,535

Question 37

What is the size of the UDP header?

Answer 37

8bits

Question 38

What is the registered port number range?

Answer 38

1024 - 49,151

Question 39

What is the ephemeral port range?

Answer 39

49152–65535

Question 40

List the secure versions of the below email transport protocols, in order of port numbers with lowest first Secure POP3 Secure SMTP IMAPS

Answer 40

Secure SMTP - 465 IMAPS - 993 Secure POP - 995

Question 41

What are the protocols for 443 and 445?

Answer 41

443 - HTTPS | 445 - SAMBA