Protocols and Ports

Question 1

Syslog

Answer 1

514: Logs system messages and events…. like event log.

Question 2

DHCP

Answer 2

67-68: Dynamic host configuration protocol. Layer 7 protocol closest to end user.

Question 3

TLS

Answer 3

Transport Layer Security which provides communication security over a computer network. No assigned port number. Layer 5 (session layer)

Question 4

TFTP

Answer 4

69 : Trivial file transfer protocol used when authentication and directory visibility are not required.

Question 5

Telnet

Answer 5

23: allows the connection remotely to computers over a TCP/IP network. IPsec can be used as secure means

Question 6

HTTPS/SSL

Answer 6

443: Hypertext transfer protocol/Secure socket layer. Both on the transport layer

Question 7

SFTP/SSH

Answer 7

22 : Secure file transfer protocol/Secure Shell which facilitates data transfer over a secure shell. SFTP is just an encrypted version of FTP.

Question 8

SNMP

Answer 8

161-162: Simple Network Management Protocol. Agent receives requests on 161 and manager receives notifications on 162.

Question 9

SMTP

Answer 9

25: Simple Mail Transfer Protocol. It is the internet standard for email.

Question 10

POP3

Answer 10

110: most recent version of a standard protocol for receiving email.

Question 11

NETBIOS

Answer 11

135/139: Network basic input/output system which allows applications on different computers to communicate within a LAN

Question 12

HTTP

Answer 12

80: Hypertext transfer protocol is an application that is the foundation of the world wide web.

Question 13

FTP

Answer 13

20/21: File transfer protocol transfers files between a server and client. 20=Data/21=Control

Question 14

DNS

Answer 14

53: Domain Name service associates information with a specific name.