Port numbers and stuff

Question 1

FTP (Data)

Port number and protocol. Explain too.

Answer 1

20 (TCP)

Used for the transfer of computer files between a client and server on a computer network.

Question 2

FTP (Control)

Port number and protocol. Explain too.

Answer 2

21 (TCP)

Used for the transfer of computer files between a client and server on a computer network.

Question 3

SSH

Port number and protocol. Explain too.

Answer 3

22 (TCP)

For operating network services securely over an unsecured network

Question 4

Telnet

Port number and protocol. Explain too.

Answer 4

23 (TCP)

Allows a user on one computer to log into another computer that is part of the same network

Question 5

SMTP

Port number and protocol. Explain too.

Answer 5

25 (TCP)

Simple Mail Transfer Protocol is a communication protocol for electronic mail transmission

Question 6

DNS

Port number and protocol. Explain too.

Answer 6

53 (TCP/UDP)

Translates domain names to IP addresses so browsers can load Internet resources.

UDP is used when you need a translation of a domain name.

TCP when DNS servers need to synchronize the information in their records. TCP will guarantee that the information is transferred and received without faults and in the correct order. (zone transfers)

Question 7

DHCP

Port number and protocol. Explain too.

Answer 7

67,68 (UDP)

Port 67 for the DHCP server and port 68 for the DHCP client

Used to provide quick, automatic, and central management for the distribution of IP addresses within a network

Question 8

TFTP

Port number and protocol. Explain too.

Answer 8

69 (UDP)

Internet software utility for transferring files that is simpler to use than the File Transfer Protocol (FTP) but less capable

Question 9

HTTP

Port number and protocol. Explain too.

Answer 9

80 (TCP)

This protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands

Question 10

POP3

Port number and protocol. Explain too.

Answer 10

110 (TCP)

Post Office Protocol

Used by e-mail clients to retrieve e-mail from a mail server

Question 11

SNMP

Port number and protocol. Explain too.

Answer 11

161 (UDP)

Simple Network Management Protocol is an Internet Standard protocol for collecting and organizing information about managed devices on IP networks and for modifying that information to change device behavior

Question 12

HTTPS SSL

Port number and protocol. Explain too.

Answer 12

443 (TCP)

HTTPS (Hypertext Transfer Protocol Secure) is basically HTTP connection which is delivering the data secured using (Secure Sockets Layer) SSL/TLS

First SSL session is established, then all HTTP data are wrapped into secured SSL packets before sending and after receiving.

Question 13

BGP

Answer 13

179 (TCP)