Protocols

Question 1

TCP

Answer 1

Transport Control Protocol - connection-oriented. 3-way handshake ensures the information is delivered

Question 2

UDP

Answer 2

User Datagram Protocol - connection-less - packets are transmitted, no guarantee it arrived

Question 3

SNMP

Answer 3

Simple Network Management Protocol - UDP-based, collects infrastructure info. Routers switches, servers, etc.

Question 4

SNMP port number

Answer 4

161, 162

Question 5

NTP

Answer 5

Network Time Protocol - UDP-based - Useds for time syncronization between servers

Question 6

NTP port number

Answer 6

123

Question 7

SIP

Answer 7

Session Initiation Protocol - UDP-based - for transferring voice and video

Question 8

SIP port number

Answer 8

5060 (plain), 5061 (encrypted using TLS)

Question 9

RTSP

Answer 9

Real-time streaming protocol - UDP-based, for streaming media

Question 10

RTSP port number

Answer 10

554

Question 11

FTP

Answer 11

File Transfer Protocol - TCP-based - for transferring files

Question 12

FTP port number

Answer 12

20 (for transferring data), 21 (for establsihing connection)

Question 13

TFTP

Answer 13

Trivial file transfer protocol - UDP-based - Like FTP but does not ask for username/password

Question 14

TFTP port number

Answer 14

69

Question 15

SFTP

Answer 15

Secure File Transfer Protocol - TCP-based, Like FTP but encrypted

Question 16

SFTP port number

Answer 16

22

Question 17

SSH

Answer 17

Secure Shell - TCP-based

Question 18

SSH port number

Answer 18

22

Question 19

LDAP

Answer 19

Lightweight Directory Access Protocol - UDP or TCP-based - Gets directory information such as lists of users or lists of devices - Used by Active Directory

Question 20

LDAP port number

Answer 20

389

Question 21

RDP

Answer 21

Remote Desktop Protocol - UDP or TCP-based - Windows-based, to connect in to use another computer, like SSH, including GUI

Question 22

RDP port number

Answer 22

3389

Question 23

Telnet

Answer 23

TCP-based, connect to another computer, command-line only

Question 24

Telnet port number

Answer 24

23

Question 25

SMTP

Answer 25

Simple Mail Transfer Protocol - TCP-based - Mail server to mail server communication

Question 26

SMTP port number

Answer 26

25 (plain), 465 (encrypted)

Question 27

IMAP4

Answer 27

Internet Message Access Protocol - TCP-based - retains copy of mail on server when downloaded

Question 28

IMAP4 port number

Answer 28

143 (plain), 993 (encrypted)

Question 29

POP3

Answer 29

Post Office Protocol - TCP-based - does not retain copy of mail when downloaded, local only

Question 30

POP3 port number

Answer 30

110 (plain), 995 (encrypted)

Question 31

DNS

Answer 31

Domain Name System - UDP and TCP-based - for resolving domain names to IP addresses

Question 32

DNS port number

Answer 32

53

Question 33

DHCP

Answer 33

Dynamic Host Configuration Protocol - UDP-based - Used for computer to request an IP address. DHCP server supplies it, plus subnet mask, defautl gatewat and DNS records

Question 34

DHCP port number

Answer 34

67, 68

Question 35

HTTP

Answer 35

Hypertext Transfer Protocol - TCP-based - unencrypted web transfer

Question 36

HTTP port number

Answer 36

80

Question 37

HTTPS

Answer 37

Hypertext Transfer Protocol Secure - TCP-based - encrypted web transfer

Question 38

HTTPS port number

Answer 38

443