ports

Question 1

Telnet

Answer 1

TCP/23
- login to devices remotely
- console access

Question 2

SSH

Answer 2

Secure Shell
TCP/22
- Encrypted communication link

Question 3

DNS

Answer 3

Domain Name System
UDP/53
- Larger transfers may use TCP/53

Question 4

SMTP

Answer 4

Simple Mail Transfer Protocol
TCP/25 (SMTP using plaintext)
TCP/587 (SMTP using TLS encryption)

Question 5

POP3

Answer 5

Post office Protocol version 3
TCP/110 (plaintext)
TCP/995 (POP over TLS)
- basic mail transfer functionality

Question 6

IMAP4

Answer 6

Internet Message Access Protocol v4
TCP/143 (paintext)
TCP/993 (IMAP over TLS)
- includes management of email inbox from multiple clients

Question 7

SFTP

Answer 7

Secure Shell File Transfer Protocol
TCP/22
provides file system functionality: resuming interrupted transfers, directory listings,
remote file removal

Question 8

FTP

Answer 8

File Transfer Protocol
TCP/20 (active mode) actually transfering the file
TCP/21 (control) tells the system which file to send
- Transfers files between systems
- Authenticates with a username and password
- full-featured functionality (lists, add, deletes, etc.)

Question 9

TFTP

Answer 9

Trivial File Transfer Protocol
UDP/69
- Very simple file transfer application
- No authentication

Question 10

DHCP

Answer 10

Dynamic Host Configuration Protocol
UDP/67
UDP/68
- Requires a DHCP server
- Automated configuration of IP address, subnet mask and other options

Question 11

HTTP

Answer 11

Hypertext Transfer Protocol
TCP/80
- Communication in the browser and other applications

Question 12

HTTPS

Answer 12

Hypertext Transfer Protocol Secure
TCP/443
-Web server communication with encryption

Question 13

SNMP

Answer 13

Simple Network Management Protocol
UDP/161
- Gather statistics from network devices
- SNMP traps: Alerts and notification from the network devices UDP/162

Question 14

Syslog

Answer 14

UDP/514
- Standard for message logging
- instead of going to each device on the network 1 by 1 and checking for alerts. This allows us to check 1 central repository where each device sends their logs

Question 15

RDP

Answer 15

Remote Desktop Protocol
TCP 3389
- Share a desktop from a remote location

Question 16

NTP

Answer 16

Network Time Protocol
UDP/123
- Switches, Routers, Firewalls, Servers, Workstations
- Every device has its own clock

Question 17

SIP

Answer 17

Sessions Initiation Protocol
TCP/5060
TCP/5061
- Voice over IP (VoIP) signaling
- Setup and manage VoIP sessions: Call, Ring, hang up

Question 18

SMB

Answer 18

Server Message Block
TCP/445
- Protocol used by Microsoft Windows
- File sharing, printer sharing
- Also called CIFS (Common Internet File System)

Question 19

LDAP/LDAPS

Answer 19

Lightweight Directory Access Protocol
TCP/389
- Store and retrieve information in a network directory

LDAPS (LDAP Secure)
TCP/636
- A non-standard implementation of LDAP over SSL

Question 20

Microsoft SQL Server

Answer 20

Microsoft Structured Query Language)
TCP/1433

Question 21

Oracle SQL *Net

Answer 21

TCP/1521
- Also called Oracle Net or Net8

Question 22

MYSQL

Answer 22

TCP/3306
- free and open-source database
- Ultimately acquired by Oracle