Ports with more data

Question 1

Secure Shell SSH tcp/22

Answer 1

Encrypted console login

Question 2

Domain Name Server DNS udp/53

Answer 2

Convert domain names to IP addresses

Question 3

Simple Mail Transfer Protocol SMTP tcp/25

Answer 3

Transfer mail between mail servers

Question 4

Secure FTP SFTP tcp/22

Answer 4

Secure file transfer

Question 5

File Transfer Protocol FTP tcp/20- 21

Answer 5

Sends and receives files between systems

Question 6

Trivial File Transfer Protocol TFTP udp/69

Answer 6

A very simple file tranfer application

Question 7

Telecommunication Network TELNET tcp/23

Answer 7

Remote console login to network devices

Question 8

Dynamic Host Connection Protocol DHCP udp/67- 68

Answer 8

Automated IP addressing and coniguration

Question 9

Hypertext Transfer Protocol HTTP tcp/80

Answer 9

Web server communication

Question 10

Hypertext Transfer Protocol Secure HTTPS tcp/443

Answer 10

Web server communication with encryption

Question 11

Simple Network Management Protocol SMMP udp/161

Answer 11

Gather statistics and manage devices

Question 12

Remote Desktop Protocol RDP tcp/3389

Answer 12

Graphical display of remote device

Question 13

Network Time Protocol NTP udp/123

Answer 13

Synchronize clocks

Question 14

Session Initiation Protocol SIP tcp/5060- 5061

Answer 14

VoIP signaling protocal

Question 15

Server Message Block SMB tcp/445

Answer 15

Windows file transfers and printer sharing

Question 16

Post Office Protocol v3 POP3 tcp/110

Answer 16

Receive mail ino a mail client

Question 17

Internet Message Access Protocol v4 POP3 tcp/110

Answer 17

A newer mail client protocol

Question 18

Lightweight Directory Access Protocol LDAP tcp/389

Answer 18

Communicate with network directories

Question 19

Lightweight Directory Access Protocol Secure LDAPS tcp/636

Answer 19

LDAP over SSL

Question 20

ITU Telecommunications H.32x protocol series VoIP Signaling H.323 tcp/1720

Answer 20

VoIP signaling protocal

Question 21

Internet Control Message Protocol ICMP

Answer 21

“Text messaging for your network devices” Another protocol carried by IP- not used for data transfer.

Question 22

User Datagram Protocol UDP

Answer 22

Connectionless network communication No Flow Control. No error recovery. No reordering of data or retransmissions.

Question 23

Transimission Control Protocol TCP

Answer 23

Connection-oriented network connection. Reliable delivery. Recovery from errors. Flow control.

Question 24

Address Resolution Protocol ARP

Answer 24

Resolve IP addresses to MAC

Question 25

MAC address

Answer 25

Media Access Control